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ZOA89-03
POOR QUALITY RECORD PLEASE NOTE: The original paper record has been archived and put on microfilm. The following document is a copy of the microfilm record converted back to digital. If you have questions please contact City of Tigard Records Department. , 7 L•' k te• r r • § - • 'r' - a ..,1_.. I .. Z a i +., - '. •..-_.:,:.. --.,,..--'....''..._-'".-,,.,,,,-..,-.'....-.,-.--:-,,,,_,.',,,-.'r',,..:-,',;....,.' . R� • r� • t 4 k n ~ F N ; I 1 r I r '' 4 a 0 AFFIDAVIT OF MAILING STATE OF OREGON ) County of Washington ) s City of Tigard ) I, lAn L l 1".-, , being first duly sworn/affirm, on oath depo e and say: (Please print) That I am a I& ((L i �a for •` The City of Tigard, Oregon. e`""a-- VA.(2.4A44) q That I FOR: That I served NOTICE OF DECISION FOR: City of Tigard Planning Director Tigard Planning Commission _Tigard Hearings Officer ____ Tigard City Council II A copy (Public Hearing Notice/Notice of Decision) of which is attached ,(Marked • - Exhibit "A") was mailed to each named persons at the a dress shown on the attached list marked exhibit "B" on the .22 day of 19 , said notice NOTICE OF DECISION as hereto ttacheda was posted on an appropriate . bulletin board on the 11 day of ,, 19 ; and deposited in the United States Mail on the ?0` day of , 19 . , postage prepaid. : ` Signature Person who posted on Bulletin Board (For Decision Only) ( AL/ I Person who delivered to .•,T O.. CL ' ::. Itj Subs ribed and sworn/affirm to me on the day of .. , e • r '! t � Wai '4°,:i'0,1).1:::,*:.✓ V O Y '' , '.r o '4;Pi.P. NOT° '`% PUBLIC OF OREGON ' jf dot ''.?�aaorc� \',!k1.'L'.' � My Coau� 4pt24sExpirea: c�-.S -tf f• bkm/AFFIDAV.BRFi � ' t" iC, f) t te , . t r d � t•, a. a �• 1 1 J 3 TOt dill County,• Planning Czgdnizatione I+AO,'tia�: Deborah,:Stut , Assistant Planner" . '.R s ` Zone Ordinance ' - ••—dent .fOA;89-03; DATES"•, Octoberr 2y; 1989 ,.;. "'In late July,,• 'state Environmental Quality'.: Coan'iasion .'adopted ; new:' regulations pertaining to non-point source pollution caused by .new de rel op The new regula ions apply ;to conetruct�,on srojectrs in the.'.Tualatin Y fiver:Basin , 'for':.which'°an application is submitted after' January 1, 1990. "Thai .City in' required,• ®, adopt 'these regulations. The. :Planni.ng Commission<.considered these amendments ,ZQA 83-03) at them.;, regu?ar r�eeti , ' � ns� on•:�ctolber .17,-; 1888 .The,;:City :�;, Cnunc3.� will l review these:amendments ,on 'November 6,, 1989:" _<*` ':The' ;EQC fie. also considering potential rules .which would :'put " iddi..-- . .l ' requirements on new developmorlte, including a• requir int for - aermanent= stogy water treatment for some developments. These raxles will' likely be considered November by they EQC and Array later be:adopted by-the City. • • Attached sate the proposed changes ("Exhibit A and S�D to Community Development Code Chapter 18.30, Environmental Performance Standards, and to:.Chapter;18 2a," ' " • 5 3 .:;New Deffnitione, 18. . F axles as found ., ®A� 340••41-45 ( D proposed wording is indicated by underlines. No wording is proposed to be d3leted'from=this chapter. Attachment • °r 1 .. I.. . . . . .. .. „ .' ''''...'.'.'...'";.: :..''''.... ..','' ',.. '1:,...:.'''. ''' / "EXHIBIT A" Chapter 18.90 EYWIRONMENTAL PERFORMANCE STANDARDS •' Sections= 18.90.010 Purpose 18.90.020 General Provisions 18.90.030 Noise 18.90.040 Visible Emissions • 18.90.050 Vibration 18.90.060 Odors 18.90.070 Glare and Heat 18.90.080 Insects and Rodents 18.90.010 Purpose 's A. The purpose of this chapter is to apply the federal and state . environmental laws, rules, and regulations to development within the City of Tigard. (Ord. 89-06; Ord. 83-S2) . • ' 18.90.020 General Provisions A. In addition to the regulations adopted in this chapter, each use, activity, or operation within the City of Tigard shall comply with the applicable state and federal standards pertaining to noise, odor, and discharge of matter into the atmosphere, ground, sewer system, or stream. 1. Regulations adopted Fbv the State Environmental Qualit�r Coaarn scion pertaining to noupoint s aurce zaollution control and contained in :. the Oregon Administrative Rules shall_bv this reference be made a - °"..' part of thIg_gligpteE2. S. Prior to issuance of a building permit, the Director may require .:—. submission of evidence demonstrating compliance with state, federal, and local environmental regulations and receipt of necessary permits. Air Contaminant Discharge Permits (ACDP) or Indirect Source . Construction Permits (ISCP). C. Compliance with state, federal, and local environmental regulations is the continuing obligation of the proAerty owner and operator. (Ord. : 89-06; Ord. 84-24; Ord. 83-52) 18.90.030 Noise A. The following additional restrictions are incorporated with the State Department of Environmental Quality (DEQ) standards for purposes of City noise regulations 1. For purposes of 'measuring permitted sound levels from noise ' generating sources under the provisions of DEQ rules any point ,,: where a noise sensitive 'building could be constructed under the provisions of this title shall apply as if such point contained a ; noise sensitive building; 2. Within the .: e industrial park (T=P) zoning district, each property or building under separate ownership from :a noise generating source shall be considered a noise sensitive property under the Provision of DEQ rules with the exception that the allowable noise levels may be increased by five db; and 3:. The construction including excavation, demolition, alteration, or .■ repair of any building, except where a special permit has been issued by the Director under the provisions of Section 18.90.020,_ other than between the hours of 7:00 a.m. and 9:00 p.m. _which_ involves any loud, disturbing, or unnecessary noise in the city, shall be deemed disorderly conduct and therefore unlawful. (Ord. 39-06; Ord. 83-52) :' 18.90.040 Visible Emissions . . ', A. Within the commercial zoning districts and the industrial park zoning • district, there shall be no use, operation, or activity which results 4 in a stack or other point source emission, other than an emission from space heating, or the emission of pure uncombined water (steam) which ,._', is visible from a property line. Department of Environmental Quality ;.. ': rules for visible emissions (340-21-015 and 340-28-070) apply. (Ord. 89-06; Ord. 84-24; Ord. 83-52) t. 18.90.050 Vibration A. No vibration other than that caused by highway vehicles, trains, and aircraft is permitted in any given zoning district which is discernible ;' without instruments at the property line of the use concerned. (Ord. A 89-06; Ord. 83-52) x = 18.90.060 Odors A. The emission of odorous gases or other matter in such quantities as to be readily detectable at any point beyond the property line of the use creating the odors is prohibited. DEQ rules for odors (340-028-090) '1. apply. (Ord. 89-06; Ord. 84-24; Ord. 83-52) 18.90.070 Glare and Heat tg , A. No direct or sky-reflected glare, whether from floodlights or from high: ';. Ili .. temperature processes such as combustion or welding or otherwise, which is visible at the lot line shall be permitted, and; 1. There shall be no emission or transmission of heat or heated air which is discernible at the lot line of the source; and - w AC4'uE: y •l t. _= x1 A 4 "• IyC 1 ♦ Y �. ,'-These r4.3gil .ana shall :not apply`Y to .,nic�ns ..or iloadlighte 3rZ parking•areas .or•conatructi on equip ent a$.,the time og conetruct .on• or excavation work otherwfee`permitted by thin title'.': Ord. "h3-5B) 18.90.080 In3ectE� and','Rodente t I►.'+ All materfi ale, ncl+ ding wacetee:ahal'l 'be at ared:"sand gall grounds..shah be , maintained in,a ,nannor which will no .a ttore.. or aid the` propagation of c. insects or rodents ':Qr create a health hazard. ' {order 89-06 83 52) j°. sip/ZOA89-03; t\LOGIN`DS$Dl3AHe Via d t ..J F 1 + *Iw4 kf �� The. followa.rsg lefinitions shall a$; ,adde to Chapter . '18.26, °Definitions, ''' according to alphabetical order.. "Y#ovelo,meat" - a building or mining operat on, making.a. material change ,in'the use `or aMnpeararnce of; a- structure or land, dividing land .iota tw©::or `are �` parcels ,i.ncludii g partitions and subdivisions ,.as .provided in .Oregon Revd sed ...: Statutes:,92. .'When used in reference to erosion control or aan erosion control• lara ,':this-!te t :. also' includes those f-'1°-: -7..'.2 activities defused in 'this Chap r nder. ''''•.4-, "Land.;foraa alteration". Erosion c®ntr•i :. „ flan" - etsall be a •l�n coni�sinin• a. list a�•/ . feet . na•:eabent, ' nract lone to be ex lied duo construction to 'control anz� Lnit eoi.l erosion:, "Jurisdicti a�n°'"� rei ors,__to any ci*v or county ada�acv. in the-Teel.atin Rive r ar►d Dews•o La ke suabbaaeins that ro• later land' develo• eat activities Within n` its. boundaries . by a rovi.n- •1-ta3': site' •lane. or. idsuin• ;smite =for and d®va�lonenent�. , '...'1•:::;....; '.*:..; ' .'. ' "Public Works P 'ject" means an land development conducted or financed `bv a local ' state or fedaral •overnmental bodes 2 a.l ys _ ,Ira .fin t, t z r .. - - ' - - '.-- ' .g.. ,..- , ,.. . HORN CAP ' 1X360 SST ACI 90TH AVE TICJRD, .OR- -97223` 3 PaRt 11875 SR-GAARDE ST :::-...;.'..... --.-.. '... . L-..' '.-'•:, '..',:,..'..,, ' ' .- ',. . ... - :: ' ' .: . '.''.. .: - ..,.. '.-' '-. '., ;-::-'..,' L.. .' ,. .. .' -. :,..-,,,%.;:`. 1.,.-..' '..'... . • ' ' . : - --'',.:\ TIGARD', °OR 97223 l DICK GEORGE, SW Dt7VALL S TIG RD, OR, 37223. ,I ' ' CRAIG HOPKIINS lr, 7430 SW VARWS ST TIG,RD c OR 97223 SUE:CARVER 10155 SW i00DVTEW DR TIGARD, GH 9'7224 =TAMES BOYLAN 4, 11€344 SW' MORNING HILL DR ,., • "- ,', : _ ;'' ,L,, ;T'. •,:,'",;?•;"'. •• • , • ; ,, - TTGARD, OR 97223 =' ':::' IlARII,Yti HARTZELL ':.':::: :7:. 10285 SW.70TH AVM I'IGARD, OR 97223 BEVUDE 12200 ERLY SW FRO BULL MT. RD �' TIGARD, OR 97223 •-� MARTEN KING ® 9403 SW 80Th AVE PORTLAND, OR 97223 1� ; • s tt ' +x.. :c 4 t • J. 4 J Y fit' a x { .:- ; , �.� � x .,� r `1 -r •4 TI ES PUBLUSIt , 6 P'NY Lega�i 7-6383 . P,O.80X 370 • PHONE.(503)684-0360 C• NotICe BEAVERTON ORE3ON 87075 lce Advertising RECEIVED 'N 0 Tearsheet Notice city of Tiga�r.d `' OCT 1'1999 • P 'O. Bo t 23387 a D. !loot()Affidavit •• Tigar'd,,OR 97223 l�1lf!3F 1(d AFFIDAVIT OF I?UBL.II Ttee. ---i ig wnit be dered by the( 1 ' , ' ',,TIle it 7�l 9'fie S 366,'; ag tb3'i 'aii iv .t�', s: ►13''5 $Tip �•oF AEQ�AFFIDAVIT �ss. eFfJaxp+ea1tr' ,y C y �D°-.Yi,, ,- 1 "' '.,.f.,,�r 1i r 9ai 1 ti;y$ COUMTti'®F 1AIASHiNOTON, FRVltBd.SIaG 11 (¢i 1 :• t /, ! r 1 I r l f r J r '',1:::= gee{, 2Cfteib•ligei mA t!114.i� ' 1: I p �'�• j !i Lie w 1, !�1'ajs{ltt<fi; ttin zN!+ �n•F. ' !�,1 , 1 ,_1,x•'k iing first duly sworn. depose and soa ;, a) a e.r. a> �• r I /:i Cxl �')t Dire tor,or his principal clerk,of the '��d ' i ': JJ •. tY ,1 ,91• 1 .X: t!1 1 .i.,. {q®l rt. �' C,1. I 1 Y �s�.1� ) a newspaper of general'Cir' 9aair t7 a8 �■e tit n 4' � t f� ' 711. 't « '' and 183.020;published at. g 1 •,. _",'a.omiattcatm-y bbt d`£W9thCC afl1 j a + . aforesaid e_r of and state;.that ,.. r infa s ,", 91..414t;!,,ortip►« f , g7 .1,54):11.,1711,0 . _.P-1�•a-�•ra'—�'Sai4'-�119,r r I 1 C f � v YtP 9t$#s�ts��•"'X,.�� �±-Iy��.^"'t t:,:::'",:.,, a rioted Cap y of which is hereto anne i . ll- s• 4j t Saar i• w N P ` SiT1 D d a A,`+ V1��Sl ,, 1. ; ,f,r- Y , . p t entire issue©f said newspaper for......—;®!) 1 .r P ( a'' 1.# * i •+�� tiif\! ! ;! v « r r ', * v � � �,�}r ; u!'.6,,,' tr ,i �,.71.11,11,`.tY-�j ��i tin" 1 II 1 11 {i t 1 1 r,Y!' cons is the following issues �� f,-,....,,, w s r-,{ y q r 1 F + a r� : _ ``T 4 !+� .tl• �\-11 k t 1'� ) l ,�.�,. S t t i.yh I 1 fPli'.1 �M�� p 4 October 5 a 1989 � 1 .!. Y�1 r � !1 1 1 1 r 1 r 0:1:j �. e T}: �4 , f+-1.- 0'� I 7'4 r,)-rtl lrT•�H N ! 4 1 1= r s � f I. s,"1 1,.;a:,"krr n. r.--„:i'' ' z n Iar ;,IZ .[a-F IJI-..�''' `1).4v+� .+- \ s ;'_c;4z 4,4 ie:in f# '1t i* y i`.`'”' + t l,'•,+ `?u � w.+r se■_ '. •rl'f-i t •' `r t !: ,. •I P I r ', ! u- 4! ' t G 7 8 i�` yt 1 ' bi y.• • ..,,,t I is 41„-,`p {,, ' ..*. a .'.t 1 P 1."f z: �t 1•.zl 1.1),1'2,. xt t M1, .£H. '' ac�,vZta r ISlt�f ,. l t��� 1 r17V ♦t p,}. } 5 •1� -...,- ,, _ Subscribed and ow' n to before rre 3h1 ! , „...;:„,,,44-,':,..' F 1, t° l r ,� t� . :I.�C � -'tA 'dC ��tA J•b4�'.k JAS `/ 1..� .� i t+•,....of �y,1.t. u ar .. -�-n�i, f 1 'zl.�.' !i .g o - .. ”,/',�'i:1•4 "L.J.y. a f:: F?,, !4 •oy d'�•bak G#'i+el.-(e 1 ',:, i, a y,^ j1,p' l A �:i " � 7 r� ,. 1 IIJ ( v t"§ t� f' �° �•.`4 l,r ,z17 i YCnri t ,4 'i"'i :,r r it rt��k=�PE'i ` ':.lz i iit,f �i"Pii i� , -t £ 1+� +... . co t.. i 7.y 1tz' r,•,..-.;;"`"....z 4.7 ,.t 1 Yh Jf `°'c,, •�' .'' i` ''M so' r i 1 iy•,it ., L y '14.,;.14:;!. >G E"c: C'�i' i "" j1 �, �! Idly CiOrt11Y113 �#cpires. /�y� 6� �� d vs �k e\r � 70I91 .''� ix. .g ti r AFFIDAVIT _ ii , .., - , ,..,,, , . , , , , ,.. ,. , , . ., , , ,, ,. , . . ,..„ , . ,,-,, „.,..,,,,, , , .., . , • ,-,,, ,,, ,,., , • „ ,,,.. ...•_. , ... : ,,,. .. ..,, ,,,...,. ,... ,_ , , ,. . , , . ,., , , ., .. .. , . , ," .OF '1..,. ., • --^ ' - • . do '' . ' . , : - ', 41P , , , ,, , , , • . , ' 1 ---01-e-,e---6--- '916-6.-----L4-----i .' .' ' . - .'' . • ::.: - ." -:-- ' That I served NOTICE OF DECISION FOR: , . ,. ... -,....."—.:i,;... A copy (Public Hearing Notice/Notice of Decision) of,which is attached (marked . ',.....-..'!..-:,:...s. attached list marked exhibit nBu on the Lirk- day of illojt)14D.g '61 o . : . '.:;.:!...,-.::: :4 said notice NOTIcE 0E DECISION as heret. ...ttachsdo was Posted on an. appropriate. . , . , , ....„:,-„,. -,- ,,,.:„.-.:.,-, bulletin board en the _____ day of .i *. . , . _,_... 19_4____i; and:drIgJellad _ , .-......, postage prepaid. L2 ___‘_____.\__k___) _________u311100,jit . fr : ' '.-. • ' -• - • '-' O. • +/7‘ . . i ..;113-C..&.6 : ' : ' - : . -..; au My Comm ss7„,,WExpires: • 1F a If t S k f •- ¢ r '.4 °� Y u 'y v r t 3 1 � t:i. t t h:l S { il f i. TO: All neighborhood Planning Organi$ onto FROM: O bah Stuart°, Assistant Planner RE s soma Ord .nance •Aden nt ZOA 89''-0 DATE:'. October b '1989 Yn late July,, the'' state'°Environmental Quality' (ofiPBi.on' adopted,• new'•regulations pertaining" o non-Point source.pollution caused.by new. deeelop me The hers"regulations apply to construction projects in` the Tualatin River,Basin' for .which 'an application. :i®. csubmittedl ^after . January e', -195®'e The City is.. ,.:.- required to, adopt these '!regulations:. .the '',Planning. 'COm scion wil consider .; these,':: n entu to Chapter 18.90, Environmental Performance. Standards, { (ZOA Sg.-O3).'at 'their regular meeting on October �7., 989'. Thy gC...is M also considering potential realer which would. put ti addition nab, 3, •. re,,, - . ents on new developments, including a requirement°for permanent t .storm :' water,:treatment for some_develo snents. "These rules will like ly be considered in Noveat by the 'fQC and may later be adopted by _the'City. If yoga would like to see a `draft of the propoa changes, You y contact. at City R�all or by Mahone at 639-4171 ext• 365 a. r • pp • • ♦s s. . . ♦ - ( , �.. 1 1 •ate r _ y� e ti 1323O SW HILL .CT,. TIGARD OR 97223. z:. - HFRMAN kPORT 11875 SW GPARDE ST TIGARD Olt 97223 Y DICK GEORGE 7435 SW DUVALL ST: j CRAIG HOPKINS 7430 SW VARNS ST TIGARD, OR 97225 R •- 10155. SW HOODVI DR ,_ � TIGA .D, OR 97224 _ :�` JAMES BOYLAN 11544 SW NRNfING HILL 'DR ''-. .-� TIGARD,''OR 97223 MAR \i`+ HARTZELL • 10285 SW 70TH AVE 10285 , OR 97223 �,;4 BEVERLY FROTJDE 12200 SW BULL MT. RD TIGARD, OR 97223 MARTEN KING 9403 SW SETH AVE TIGARD, OR 97223 ii ' gill •.. ., `..; ,;+ 'fir 4.sa ' '�' < t,• fw ' .wr 1"'2 .rt r * ' y ,.a ■ ,�: 9 ,.,..„,....h_,,....,1.0-. 11 ,y ^J® I{��y���iq/ { ' ® I •'Y ��i�t��■ Yi d/! ��ifl■M r *NY. $ .., r't,. ' ' °s'af 7 6 03 ,: r P O.BOX 370 PHONE 650 3)7 a34.0t360 3 once + t BEANERTON i. EGON 97075 `f' s , s" :L t - Pr , Legal Notice An�iertis3ng : ocr19 ) . �; City of'''./;',.' :"..s gartl • . 0 7'earsh®et Hotice P 0 Box'x23397 fYf eY` Tigard, OR 97223 o ® Duplicate AdavRt S t J J k k f: AFFIDAVIT UBLICATION STATE OF OREGaON. ° ) if a:: COUNTY OF;WAlSFi1NGTON.. ?ss Tfie folio will 1 considertrl b tlne Ti Cdiriaon an .i- A,l Ice.Au rden y. . & n issing:first etuly swore,;,depose'OcL 17,1989,at7.30�'PMatdee I"igaxadCivicCenfear Ti Wn.Hall,l3R2.5 . SW Hall Blvd;Tigard; emu.Both Dubuc o a1 and wriltenryt tti; is Clireclo�`�or hid prmcipa l clerk, 'invited.Tine public hearing on ahis'maiter wilt be in a a"newspaper mf general cirt;ul with the rules`ci Chapter 1832 elf the:Tigard Munacipal'Code,dad ttib s and 193.020;pvbiished aS .;T I d;p diirec of the.Planning Comm sron:Failure to aaiS an issw :a } afo e d co nt _ eliO d.a�te;the , - • nr by letterprechidcs ate` and failure to.: the cri'eiicn ,•, g g *. i s i e .e r'�n the C.'olimuPtty Develogrnent Code glIng.pr Y .-a..�v1 Ala 1 1 a3;-snit d.copy of which is here a comment is du±ccted PrecDudec an age bald on that enter, c Furth information,nay be bbiamed from t e Plani'.mg Division at 1312,5 SW' en tire'iasue of sac'..newspaper Uall Blvd.,Tig Oregon 97223,or by callia g 639. 171. tconsecutive in the folio wing isr PUBLIC ARINGS ` iO':tober 5P 1939 SnE.DEVEWPMENTRE W'SDR89,2OVARIANC�•�i8926 CAIN!WTM DEVELOP. NT NPO#t3,An appeal o tie Direc 's K decision to approve a"Site 13evelopmeat Review approval for corisi cdprn of a 22,27.5 square fool mixed use retail and auto service center.Also ap'4 proved was a Iarit ice fora 3,JbQt huffier zone where,lO foet,iS nOi!rally '( requi2 ! 7ON C-G(Ciener'al erciaD LOCATION 13702 and 13135 SW e��{ 2S1 31DD'tax toss 400•and 500 .. '.}. /`� :`;`7:,'' 1 .r fa C I Ott 3 `a t .,' +t...k '+,'""� !'��1 i el Mll su' I^ --* - Subscribed and s�rorf• to befog„Anarrnendinentof 1 ' ',Enviropinenta•to adopt ta;iengora.. - .Oregon AdminisD2tive Iteu1esaulated to construction '' ..:,...e activities within the',tarlatan River basin Oregon Environmental . Co� /y on it directives ire°the new rules be in effect byaannuary'1, }- �( �1 1• O Cit'wi� tg.. 1 1{:. -'''ch 3 f ,”. 'x t fry t :. • . 1v�(a Ot r"iri •a�16 '�1 S�7Yr t f Ki' u,i 7� � I.e;4.__'Sr I.C f Jatramis- - Expires: - `A OF '�' :C.. 'S n TE PP' ,-i T1ON BYNP #3` s' AFFIDAVIT Aicques.Uoraruvbew4ofa•1Di .nr' .iateipre'.�t - ',..0,1: -1S2bain4 1894 tot the :omaa arty Developn>eeateCode 1 .-. 'tan�,mau+ufactured and mobile howe'r d..tk 4 K tk- '. -: yr'''-e 1 i Yt'% ti+> 2..'� r+ a j TT6 83 1�ublishrCDrrtobe>e 5,1939' . u r �,`� t r Yr M t 1 z..„. QEt1. _ 5 1 �t , fY -`• s ti x_ iE '� k 5rt 1 �ja�� t �. + s• i 6 t - s, C Il',.;y'G S �. 7 r k t s 4 t t y 5 , •S y NOTIFICATION LIST FOR. ALL PLICATIONS , .,,, :,., 0 . .. 1. NPO, No. �t/t/(2,copies! . CPO No`e L 2. CITY DEPARTMENTS Building Ins$aector/Brad R. Parks '& Recreation Board/Curtis S. City'Recorder Police Engineering/Gary A. Other 3. SPECIAL DISTRICTS` Fire District School Dist. No. 40 (Beaverton) (Pickup box bldg.) Joy Pahi PO Box 200 ,. . Tigard W.D. Beaverton, OR. 97075 ) 8841 SW Commercial School.Dist. No. 233 (Tigard : Tigard, OR. ,97223 13137 ;SW Pacific Hwy. Tigard:, OR 97223 Metzger'W.D. 6501 SW Taylors Ferry Rd., Tigard, OR 97223 Other 4. AFFECTED JURISDICTIONS ; • Wash. Co. Land Use & Transp. Boundary Commission • 150 N. First Ave. 320 SW;Stark Room 530 Hillsboro, OR 97124 'Hillsboro, OR 97124 Brent Curtis Kevin Martin METRO - . Joann Rice 2000 SW 1st Ave. Portland, OR'97201-5398 City of Beaverton X Jiia Hendryx . PO Box 4755 ° 4755 SW Griffith Bea o n OR 97076 76 v ert State Highway Division Other Lee Gunderson PO .Box 565 L. Beaverton, OR 97075 7. SPECIAL AGENCIES General Telephone Portland General Electric - Mike McSherry/Beaverton Brian Moore 4155 SW Cedar Hills Blvd., Portland General Electric Bob Olsen 97005 14655 SW Old Scho .ls Ferry 12460 SW Main 9:x223 Beaverton, OR' 97007 Northwest Natural Gas metropolitan Area Communications Ronald D. Polvi PE, PLS Twin Oaks Technology Center 0. , , 220 NW Second Ave. 1015 NW 169th Place, S-6020 Portland, OR 97209 Beaverton, "OR 97006=4506 . Pacific Northwest Bell Other (0257P/0006P) (R-2/89) .:,..,. . ..;......:.,,,,.,. ,,..;..,....:,,,,,r.,.:,,.,,-,`,,,,:. .'''.:..,,,,'•.,;;.,r .' ::-7•••'.:_.:,''''...:..''...'S.,.". -,':,', '',...,:•:;'•1 r 10- + K y ` t � rS� A f '. 5P ;STATE: AGENCIES .,:1,,,,,•.,...,,,,i,,,,,':: }" '�� Aexonaut s Div. (ODOT) BOGANI t a. .. '. Engineer Division of State Lands ' �'":Board of Health' Commerce°.Dept. M.H. Park , .,' fish &. Wildlife-f '?` Y parks & Eecrer r `Di.v." (ODOT.) LCDC ., parkev";gion Supervisor. PBC ° Fire Marshall :.: ., Dept. of energy of` fnviron., Quality Other, n Dept.' ,•_ b. EJ) R L AGENCIES , 4 'Corps of Engineers Other Post Office ,7. OTHER i 3 Southern Pacific Transportation Company Duane ",°1.7a•Frney, PLS - P.roject Engineer 800 Duane Avenue, Room 324, ,union Station Portland, OR 97209 0257P�6006P i• h ® to /F 1,`,.,:.:.,:'-. .`r { #r r � Il� '- i r o a t 1 hF s k 4. Y S 313k Y ? rr li S>jv " & � � :''..''....-" . ..,.. 0 1 ' i s' '. i i' �� , t .P•y � f�al f P z 5'.n`'4 v i i tx, s A ';'∎ • a ftr d -0 u3 1u5' a r , ., i i i t ^s a I -.,.. Orr OF TIO BD, OREGON ORDINANCE NO. 89 -%^"7 AN ORDINANCE TO AMEND CHAPTER 18.90, ENVIRONMENTAL PERFORMANCE STANDARDS, OF A 's 'THE TIGARD COMMUNITY 'DEVELOPMENT CODE AND SETTING AN EFFECTIVE, DATE. (ZOA 03) WHEREAS, the City of Tigard finds it necessary to revise its Community • < Development Code periodically to improve the operation and implementation of the Code; and WHEREAS, the Planning staff made recommendation of findings to the City of • Tigard Planning Commission at their regular meeting on October 17, 1989; and WHEREAS, the Tigard City Council held a public hearing on. the proposed changes at its regular meeting on November 6, 1989. ° NOW THEREFORE, THE CITY OF TIGARD ORDAINS AS FOLLOWS: • . SECTION 1: Chapter 18.90 of the Tigard liunicipal Code shall be amended as . . : shown in Exhibit "A". Language.to be deleted is shown in, [BRACKETS] Language to be added is UNDERLINED. . SECTION 2: • This ordinance shall be effective on and after the 30th day after its passage by the Council, approval by the Mayor and posting by the Recorder. PASSED: By 1.J f(i rr'a rYiQg5_ vote of all Council members present after being, • read by number and title only, this(G b, day of !I vlrnhGw s 1989. her •-- Wheatley, De ity Recorder APPROVED: This (, (0 day of 'A140;0/241-1 98 Gerald R. Edwar,=, - •yor' Co ed as oo form: C y Att rney � 1t b Date ORDINANCE NO 89 _o)7 • riy...a , w p-_ , "EXHIBIT ,A" r ` Chapter 18.90 ENVIRONMENI'AI, PERFORMANCE STANDARDS. Sections: 18.90.010 Purpose .18.90.020 General Provisions 18.90.030 Noise 18.90.040 Visible Emissions 18.90.050 Vibration = a., 18.90.060 Odors 18.90.070 Glare and Heat ` ` 18.90.080 Insects and Rodents 18.9p010 Purim®as . .a A. The purpose of this chapter is to apply the federal and state environmental laws, rules, and regulations to development within the City of Tigard. (Ord. 89-06; Ord 83-52) 18.90.020 General Provisions a- A. In addition to the regulations adopted in this chapter, each use, activity, or operation within the City of Tigard shall comply with the applicable state and federal standards pertaining to noise, odor, and a . discharge of matter into the atmosphere, ground, sewer system, or stream. Y. Reaul.ationu adopted by 'the State Environmental (li,:ality CCmxi3ission rtaining to non-point source pollution control and contained in the Oregon Administrative Rules shall by this reference be made sal Part of this chapter. B. Prior to issuance - o€ a building permit, the Director may require submission of evidence demonstrating compliance with state, federal, ®, and local enviromnental regulations and receipt of necessary permits. y ': Air Contaminant Discharge Permits (AGDP) or Indirect Source CO Construction Permits (ISCP). !i C. Compliance with state, federal, and local environmental regulations is , the continuing obligation of the property owner and operator. (Ord. 4i 89-06; Ord, 84-24; Ord. 83-52) -a , 18.90.030 Noise A. The following additional restrictions are incorporated with the State Department of Environmental Quality (DEQ) .`standards for purposes .of. City noise regulations f A.ay 1. For' purposes of measuring Permitted'-,Pound-levels from , noise - generating sources under the provisions of DEQ rules any. paint where a noise sensitive building could be constructed under the provisions of this 'title shall apply as .if such point contained a ` . . noise sensitive building; 2. Within the industrial park ''(.I-'p) zoning district, each property or • _ building under separate ownership from a noise:• generating source ,- • shall be considered a >roise sensitive; property wader the 'provision • of DEQ rules with the exception that'the allowable noise'levels may be increased by five db; and 3. The construction including excavation, demolition, alteratidn, -or = . repair of any building, tsxcept where a special permit: has been R , issued by the Director under the provisions of :Section 18 90.020; other than between the hours of 7;00 a.m.' and 9:00 'p.m. which involves any loud, disturbing, or unnecessary noise in the city, >. shall be deemed disorderly .conduct., and therefore ' (Ord. " Tw 89-06; Ord. 83-52) • .� _g 18.90.040 Visible Emissions A. - within the commercial zoning districts and the industrial park- zeniiig '_. • district, there shall be no use, operation, or activity ..which. results , . , in a stack or other point: source emission, other than an emission from _ space heating, or the emission of pure uncombined water: (steato), which is visible from a property line. Department of• Environmental Quality rules for visible emissions (340-21.015 and 340--28..030) .apply. (Ord.• 89-06; Ord. 84-24; Ord. 83-52) 18.90.050 Vibration A. No vibration other than that caused by highway vehicles, trains, .and aircraft is permitted in any given zoning district•which-ie dtsce;•nible `' without instruments at the property line of the use canccerne4. ,(Ord. ; X71 89-06, Ord. 83-52) 1 18.90.060 Odors z;' - A. The emission of odorous gases or other.matter in suoh. guantities•es,"to ba readily detectable at any point beyond the property line df ;the use ' creating the odors is prohibited. DEQ rules for odors (340-028-090_) :. ;:. 9 apply. (Ord. 89-06; Ord. 84-2.4; Ord. 83-52) t i ; 18.90.030 Glare and Heat ( _ A. No direct or sky-reflected glare, whether from floodlights or flow high temperature processes such as combustion or welding or otherraiav, *which is visible at the lot line shall be permitted, :and: 1 Thera shall be no emission or- transmission '.of heat br heated air , ::Y which is discernible at the 'lot line of the source; and �;.... , ,. s � r fC y f t rp • iCf y ' f i, Ar `: r t xL r2r e �. � y: �5; � t r i A#j}; 1 r� f TY i - The° - hlll. nc* apply, tea signs or floodlights in parki ng areas or conatr�Ct.Ofl egui.pment' at the time: of construction ;or excava' on. work otherwise permitted by this title: (Ord. 89.06; Ord. f:". 18.90."(080 Insects and` Rodents n i A. All materials including wastes shall be. sto`red and all .grounds shall be maintained in-`a manner• which will not attract..or aid the;propagtation oaf insects oir :rodents ar create a health `hazard.•,`- •(0rd. 89 064 Oi d ;83-52) chi/Z0A89-09 k 1H:\L4 GIN\DEBORAHe _♦ p a f ■ , a fir D. q' fi T 1 C : I '. 1 M ! `C ` 1 i C k fa t7 • C 4 y . T /.. F. `f#v ; �l rrr ,'., d ,: ':' gX,,, ,q V w#a new?e,;e .,,� JiT � ' ",hn'Y4 1,4 rM i '• iS�, 7 n ��∎ .,,■ ,!i'f T''' u< .i a qy� ;tth14 , i ,wf4 t4i," 4 t t n ..d�21=1:19j A 6 S . a , "5 j ! . ', rti ,,,,,sy ,s6 : 3-�8 83;"t�CNleet g �, z�. ' ,i `` � 22) - t 25'p h i t ed Setre-t ry ofi Y/ r � . � n 4,,lit'.5 ' Notes. Bracketed I. 1•,material`is proposed to''be deleted.: Underlines - materials. is proposed to'be inserted. DEFINITIONS ,' 340-41. 006 ' Definitions applicable to all basins unless context requires. otherwises' (1) „Bop... means 5-day 2,0. C. Biochemical Oxygen Demand: (2) "DEQ" or "Department" means the Oregon State Department of Environmental Quality.` '1,11;•••'"7. ...... ' (3) "DO" means dissolved oxygen. • (4) "EQC" means the Oregon State Environmental Quality Commission.' (5) "Estuarine waters" means all mixed fresh and:oceanic wa`ers*in estuaries or bays':from the point of oceanic, atier `intsusign .�. ';-': • inland to a line connecting the outermost points of the headlands, or protective jetties.•(6) "Industrial waste" means.any liquid,ilgaseous ,radioactive, Pr ' -�,t . solid waste substance or a'eom.bination.•thereof resulting from any process of industry, manufacturing,. trade,,:ror business, or fraim• , . the development or recovery of any,.natural resources >' ' (7) "Marine waters"'means all oceanic, offshore waters outside •of' �' estuaries or 'bays. and within the territorial.'limits of'the 'State. of Oregon. ,i,_°„ t' G. °r�a:,~ ..° , ,•�.} a it.. t 31• ;.. (S) �.t"mg/l", means milligramsa PGr lice " tt .z r; : X41 w „f;7' 'tt tl: .-Y t 2 S 'i�, �xt111, . . :- –T� <s' ,.i�rv' A�" -'- .t'.,i. Vii. -,ri,tt�.t YiY't' -;S` t «`"''i},. y . s `. 4 ;>.$- Y { k Mft 3 R • (g) "pollution">means such,:aontr xi�iation or otlier� aleration,of,the , �.� ,, i� 'physical', 'chemical, 'or ,biological;properties,of ashy seaters og the ' t ; ;kr,� • state,` including change,'in temperature, taste, cclos, turbidity, ° ,. ,a :::-./:-':.-- : silt, or odor of the maters, or such:radioactive.or other substance into any waters. of the ;stete:,which either bye itself or R OC in connection with;-any;other substance, present;-,,;.:-..,,,,,,....t will or can x t w} 4. reasonably be:expecteal;; o;create a tpublic0 nuisance :-, r1t..der such 4r,�Aar waters harmful, :detrimental,.;or�:inju iou� tot p_b.ic,health,, , < �'�� 3 St ''t'` •. ._safety;407 C(welfare,.;for,4tO,i„,adoffiest �, comma c Vii,�z�Y1�SustL�8�,8ryr*r a w'y t t to>benefic.iLal des s- $..n< i,,,x;r� agricultural;:recre�ttiOnal st for hoC:leg- @g dHT2 "A'r1:? kt i �1.tr' 1'414 r }rt t n y #3 habitat livestock, wildlife, fish.or other aq�satic life,e or;the ,,;", ?�,k: k`' rL W habitat thereof �:t'" 7, ;,','"'11,:',.,t,,,,..:, Ft n,N h J i 3 L�'} �' ~ a 7 t i'Y• 'i x,1,13 a4k ,: f�.'t, � i ga,.vf+. ..� �n,* 5ti x•a,iF;k.. 'Y` . e r.,. `.:. yn � ear o �' u (10) "Public water"nmeans the,same as';"waters of the state"' , �_� ...,, .. - 5 ,y ( ' 4',t i�t i. rt (11) ."Sewage" means the water Ycarried `huma:a or animal" waste' from residences, buildings;: industrial establishments, or other places. ' �, , 'together with such groundwater infiltration.and surface water as°i i!: r ,, 'yt• 340-41-006 1 F`s .'- - � r� f y } 34 WH3a82� ,..,'' ''�" d .� Q J,. ? Mix � ,� F n ' -` > • ` 1 % d, t «Jr J" .,4411 has. n. a. .,s . . .... .. } . .a nt1,a,::k0 S 'yr x. rdk t b a mt <,i•'rt a h 9 kr. : + 4,` y @i'Sel14 t r i ?' ;F,� :,�c S t W.*, 'r ti t tyN r t 4aq, t% MI✓ ' ' ' ' v >M •. +..'-,•.: 4 .'"2 {, .a ' S c>. 1 '+ un, ti t 1,, a ".«t,• �. i i w 5 i r ., • c r „ may be .present. The admixture.'wit'a;sewage as„herein defined •of .: industrial wastes or wastes as 'ref red "in sectio b,in)tared (13) of thi• rule, shall also be conside , g. ui meaning of this division, (12) "SS” means suspended solids_ •::::::':.:;..'.."'' ' -. (13) "Wastes" means sewage, industrial wastes, end ell•.other_liquid, gaseous, , solid, radioactive, orcauaer Q cation of any weber os" • may cause pollution or .tend to P, the state. " , bays, �®reds, impounding .: (14) "Waters of the state" include lakes, reservoirs, springs, wells, rivers, streams, creeks, estuaries,L the 'marshes, inlets, canals, the Pacific Ocean w thin eftetrfaccio limits ,and all - underground waters, natural or artificial, inlandoroastal, ,. " fresh or salt, public or privets (e cept, .those private which de not combine or effect a junction with natural surface ,or which are wholly, or partially within or . underground waters), . .. ; - bordering the state,or within its jurisdiction: ' 5 i ' (15) "I,ow flow period" means the flows in a strew resulting Priam :, ' 'primarily groundwater discharge or baseflows augmented from lakes jf' .. '' ` a n d storage proiects during the driest period of a yeax: l'he Vii! - dry weather period varies across th.e statq,according to climate and topography Where vier the.lox flow Brio is indicated in the ement Flans, this period :has been approximated Water Quality Mang by the inclusive months. Where applicable in a waste' discharge ' permit, the low flow period ray be further defined (16) "Secondary treatment" as' the following .context magi requ';a for ' (a) "Sewage .wastes"' means the,minimum level:of.treatment, .,� , by EPA` regulatiC s pursuant to Public L.a•W X92 500,L.snandatad y 5N. off° � - " imply $ontrol �fl ,��� ., (b) e"Industrial°and other waste sources 14 } . equivalent to 'beat practicable treatment (b ) t. ®, (17) "Non' Sources" refers to diffuse.•or unconfined sources of} of be conv@yed-',4,,'Sy' ° •, ,. 1} pollution inhere wastes ',can either enter into s, ,,,a , i �' ,. the movement of to taublio waters bra wyggyt �y �i�j y q y P4 y �t,. �A 'P 'Y 4,4.4 R...Y .ia.a, ,, tl:a 1t` 41r j��t t •water .. .fit9;''" ..L... 4-,.,-:', - 1S oadinng C,}, p y IC • e greatest a cunt of lasau .4'4-• t _ d ' ,,' : ) .- 'recei y''wit'aout4violating water%quality stanoardE4 , 1 :,, i j .„ivaxt.., `3g `rA C9 y,� a `p �rtion of” a•receiving,t mater's lo• ading ` ;�f.;Y i. , (19) Load A11ocs�tion ( ) k► capacity that is attributed either to,once cf its,';exist g or, ° ; <, ' 4 future non-point sources `of p ell mien,. r to natural bac tgrOc�.nc# ,..;,,,,-,,•,.-14,,.-., ,»r sources. Load al.locati®ns :are'best estimates„°of.the loading,, {, -. • whit may range from reasonably accurate estimates to grossr ,` Y� , depending on the availability of date and appropriates • F '` , allotments, r `� -. �' �' ' �� � ° �d � ! F,S,pj.tel x• tF • � , r T a e I r t y 4 - 340 41-006. } . .t 6 r� AS �' 15+5 Sn•�t52 ^ �. h i ' k'K4 :S r �tt38 c t6 c F '� m.., r w x kx�.0 . t, ,.,:1',,,:,:,'...,..':-.4'."..,"7...- s ' 4`° 1 G• i r",(,'.,. r•.4W s�M': ,} r�: c. x 4,,y s z + :'1:t,,,, $ C"� - ��;. �f °�+' k F.' i l r S.� 1. S£ Y art P,M r 41 Y F 4 �7�7�y r(,-K IZ 1 ( C. fi 4 ! 4� Y kr k � - r '� �' k t .*rr, . ,.tea � �� }• `}1�. � t a i • .i r, ,r 1 e rr•techniques for predicting loading ? 'Wherever;Possible, natural aitd rionpcint'source. loads should'be distinguished•; t ' . ti . R .. : y ''• '':-1.',3'.,...,=.'• (20) Wasteloa�l Allocation ,(WLA) ;'Th® portion of a'receiving,wtater's ` "f :: ' loading.,--; ` pacity that is allocated:;to one of,`its 'existing or , axy a future point `sources. of :pol1utionoi' ,WJ: s constitute a type of; . ;' water'quality based effluent`limitation. (21):Total Maximum Daily Load (TflDL.) The sum of the individual Wks for point .sources'' d us f9:: ,nonpoint-sources and?background If ' • a receiving water has,only .one point.source discharger,, the T1WL is the. abet. of that'paint source, WL plek,'the, LAs,.for any nonpaint' sources of.pollution and natural background sources,..tributar,1es of adjacent,'segments. TMDLS `can be.expressed in terms;of ether mass =per tiffic,;" toxicity, or other,appropriate measure:. If.Mcest _a _• Management practices .(B iPs) 'or 'other nonpoint',source pollution . controls'make,more stringent load a11ec tion .practicable, ,teen. Y wasteload allocations can be ,made "less stria eat Thus the ;,, process provides :for nonpotht source control tzadepffs. ., rave e. e " a ,.� t srYu ed c,a e to is� x ci b ,of; t,d to' z ® . utt m• oved . ea`' esta a vi d. } '• co st tic' nst. '_at.oa '° •' e :a o '_o a bu' ..d n 'er atha s ctu a add .:,._s,: i d .,= cudi t=.. e.`at o�:, u _ . :;. that due to _a ac' s;s ed . x u. d cos c o x this be. s nay m ove�e s or use as k storage'. AYavaticri o clearn_g,. „ sd ctio.," e' .; b•as: , s o at; a • d v , ,• a = act ei es within, is bo •a, b ov r ' isuing' permits for l and dee�elno�_,_eat. . C21t1 "gyros on Co ol. ' a," s • <ia a_ , a •'.•act ce. o • du .. .� t s . o Ej and unit soil eros Et1 • �1 t 4 l25) "Pub c Wo ks act" , : ai land•'.dveloismet `condta a i�or `� ed4®ral overnmental body`, .' financed by a local. s :s'te't'. -. g ;: x :Y i � L ,�4 • j xT ,5 rl 4 t { i f � 'l i r t ,z tr L',".-4','-',.,:,:"A, rFS i„+�TX fixs rt '.' 5 r r a : � tip, n ,� � c ` v .m r i.f 1 < sxrx } fdxh;!t r �r- ', • F': :, Ery r { �� 4 ,i r� f min , el r r - x e S r£x K 'I. F t ti y F x, f la{y g,i 2r� �E >F r c S▪ 1 -,,,,-,„,,..T,,,„., r-� !q tr '4, T'C 7 v.x• .. rp �' °'cx t L ,q�r. Y� v "t aFu -340-41 Q©,6 .� H. t -h ,�.x; i y• A Fir h • „. h� '. "3, r_ ' a ,k �, `� '+'tl �d a� c 5�g?, r r� � yip. r PC'i�W 352 i k K rx J r �wcx ��y .. : .F 3x �y` sF� ,"w6 x + ✓ -T ” ' ,�d • a. 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Brackeced ..• . ,.-, eiria10'.,.., ..proposed.•,,,,..."-. ,.- 1.,-,... .adsrlio04, ,---.7..... :•,C: .i..':4'': • ..,1'1'';'1,1 %.'',';'''','':'.' :'. ' '," 4' ', '''1','.4'A.11'. '1 ; ' 1' . ''. ,L' '' •'' ........,,,,,..''..'.' ,'AND: COF11?.... -- '..-• .-.,".,-."-:',-,n.''=-:. ', ....,---_, ;-'....'..,'' -:' ''-'...:'; - '"'' -..'.n;',.';''.....; ';'.--- •- **,.., , : 2...;";.-',..' •-....ni:.-:'_-'..., -;:-...; .j.. .--:„." '....'. n'.'.' -" ' -,„. . `..--,.,.- '';-:- ''it,,I.R.BILLTILL4in . •-,." . -...'• -.''' '-='''.' - ----; -.., r".-•-;-'' ':„:,.',;:nf'.....-.......,,... ..... 2,-)..=".1-,,,-- „',..";.;-;'-...",:;- . ..: •-.-:';--- - '....•:-...---, 7.,'''''''...:....:.:',..-. '''''''' --,.2... ''.'"-"..'.-' ..0ESIGN' Pi, •- .i. o.L;..../iitor,..,. '.'. ,...-. ... ' .,:::-. ,•..,..,:,.:,', -. to... ....--::......,..•, ''.'.,....... L' ...,...,tat,aivt .. .. ..::. ..,..'.,'... .. r - . ' ' . ' .. c• - ..:. .. - . ''''.'...2':.::.':'- ' .'-'--...i-:,14044.1.-.),. . .1..-L' ,:ii4 ....',-•:-"; r;...":''.':-.'''f**L,4'. ''.• treated 04 controlled -':.-ia.' ' ''''''."....= '' ''---;.-• . be - - -.. z,_,criteria '"- -range waste from • . .h wastes' - ..following minimum-- -. -' - I. r44-.. f any -- . -- 4 u ;Stic ' ,;rhe' f0. 0- 'd s normal.;.....- •.,:. .-,- ,,,,--., ' ,,,_,,,. , - -, -* •-.',.;. .."."';',..,`: :,,:". . .. . ...r. -: Subject, . ; --discharge- 0-- River Bas- r -- with --- . .' : - ; and . A Willamette . in accordance., - --erase.condition., . A sign.criteria.-, -.,...i ,or..nea...4. ..„.- ,... ... .... , . .,„ .=, -..'---.-.• -...,„'-',' .' .,„, ',... of iities designed.,,,, nt facilities,4_,, establishing.,‘.!. h,uld'oPeF. i --.- - .'.',..-..,-' .• ' ' ,. 'im;,,fao- 7 rtre4......e-- - ' used ,.n - --tion.s--.--, pr.e.i,z1,ithont:4de,s gL-I,,_.,--.,,,.,,..-,:, ,); ,..,r., ..,:trs,... ,,,,...,.,. .,•....:,,,,,,.. .,,,i, . -.--....`-' .,-.:....n.' designing' ' oners13!.Y •placed in operation operate•-var-r-s moiste _ ' ,.4ine,- but- '.-..tch 'ate, . , i treatment" . ce-.....- = the, ,... bleb w4 7---. '- 4.lagiaa'''' established bY., facility - ' -,t most 04- r variables. .,,,,,/. for,b...0 -- h' -esto- .... , .. ... :•-.----.,• ,,',,' ' ,-. -,....., --. sip,: limit 'times due -ct ; -', l'u'r ' -. • ' - iiasd to.. e.r..•. .fotriniP,tlee,...7. --, - --- • -n,,--: .. n. '.'nn ' '. level may at times be less than the dstgu.-..,--.. '::-..,.!,,..'..... ...-",, ihe:,dc ., limit at PA. ... - Art..1,0te- r'. actual performance Per- -.. . '..-- ' ;- -..... -..., • . .:. , - n- '-'. . - ' •- ."..:---'. ' n .. - riteris.'L "'This is particularly 1.- ,,, limits .. . .- ihat.,the. -C.- -uncontrollable.' ' 'actual' operating ea. -- gmise.... .- - ),,,(1) Sewage wastes: ... -: (A) Wi1leette- Lit: (approximately May . -.. --t,iii...., average (A) During periods of low stream-"-..'n''•:. . - ''' ' ' ' - • . .to -: ..- ' 4 4,1stct - -- ...•:., , ' . . '• ' ,g.f.i.terit concentrations g . i 0C111-7r .....'..,-;.... , -. _. , effluent-. /1, of S- 0 , ;....i-,-.. . ,, ,,, ..,.. . ...-flintirox.,,,,..;,. -, -,-„:„'..:7;.;;•.':',-' :.•;:,,Y.:'.:4';.'-'r..;;.•..1:4;'.i-t.t&‘`,.• • ' -.,. ' ' ''.. ' • ' • and 10 11641 ,i1 141,, 14i4iley:4;,ir'',4,-'-i-.:,-. '',,;,..''..',.‘,.. ' 7'..2:-.',2.'(1'.-'''.''' . _. .. • ',period iii hi.g.,.-i-,-,.-7,,-- ----1: i"0. , 7-';',7,--'.' il.,'kitiPe.'-'!",';'4.;;'''''. ''',.", ' .." .- ' • 1 Iittr3.0g-':!. . ' ' ''Aiiiiil-'..3„....--' ,. 14aitk ...'-`e-F,1„.„.... ..A\::,operation- - .......,-,,-,. ....„...,,..,-- (B. ,- . .• -ei 1 tp.. .,.. ,Litit?.(4.01.,-,.....,.„-., -. ---;tn.,tert ..i!..., .•••,,• ''''• iiiiiii-:''','..!:-.,'`c,;,,••'•'''.'''':'.'••`'.'.',.',',.-,'"?''' ' •Neoper ..,.,iiic .equil74 ..4 !it.,'?e,this'.',popilc-.--ii.iii-a.,-;,-iit ,,,.,..:..,,. .. ,,.,,,--;...-:-iii:',L'z'''',' ,;.'..'-',...;i'd..,.. . ......-.-.... .- 2.-.., L.. .' .. ' , r .. -l.".,;,,',',:,.....,. •--. 4-.,.--.:'',',, .*.4trio'fitut.e..1.._ ;-,e,2'uthOt, -12......411,'''it:',-70.a.i'lee'');,'''.f.i.,iL.,..,... .....:7"...sti,‘"-*--,ae..,''.,'st..4.,::::"..2"!;.,...;,\,..,.. '-: \.;.-..-.`....'":**--.,,,-;.--.,--'":„.1',....;,,,,''''''.,.';`,‘?'".'"-i,'),''';'4I,“--,.;','..I;',' • '' . specifically--; -t trest4- ". T,61-affeP ...,,-.. .. ,,,,...etis..- : ; ,..-„,. . .... -•:',..'...•....-. - . - ' ' ' . 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'F1..••,.`,'".1,"...•.••`;..,..':'..'.'..:";".".',',,-':i.,.:';'',.:'..;-::';''.,:-!';.:'''i•;‘,..L'.4.;'.",4'•.•:1••['';,\,0''1'''.''','','i''','3i.:'`.':.i',r',....:'",:•.••..j.L;''4',J,',,-:':.•i..'";-•':',:'=,';I.:.rC`;:',.-'"'.7,:-)`!.:,;,,.-:,,.':',,,,iNr*'.g4i.',,7t':''3I-.'.:-'•:':'-:•,-'"J:,7'1t';1ZV.1t-;.;%`;1;-.:,]•'',;?::t"c,.!'-''J..'..1,r;;4,..,'•,,Z'I.Y„`c;,:',11...51.,.:;-3•.',:,^p.t,•4''',:'.1i,-,;,7.,-',7),.%41/4:•4.'i',5f.2•j4=4`'''.''`•_f.`-.7`.,,3•;f-',.,./",k.t"3.".%':'.',:'v;-,'A,i•,.V:•'..r?,,.,A'".)",P1;.'•••,••''.,.•.',1'••••i':.'.E',;,,..•4';4 4i--1'y';.'',‘1f.!4";'.:.'',''..'t','''''d`.,;.,;,,,•"iy.,i-..''':.:,.. - .. '.'', . - --; - -- ,-.--. -- . ,.-.'-'?..'--,..-5:-....-,,..;.-.-,=.---,.....,:,...,,---,..-•-:,,,....„';1;-,,....,-_,,.!_,.,.;,-,,,,,,-;,,,,,,,,.,..,, ,,,.....i. _ .. . . .- .. ''..:-=';',74-:--,.-1. :,''-,,-- • ---- • .. . s.us •'�h ..y < , .k . ry, -s. .`.Y`r:�' ..,4 -~ .ig;" i.i, ,'� i+'Y �n%t' eda "•., t r'+ '°'$ `d ,g r aft t`n n ar54 ryeewf rk • . ^ �° a s wt` . $ 4.1•!'''..,'iG...•. r hwti. �':n' rl. 'ta:i i w,1 r;rr tr 5-{` e i-r;:' k,'4 v.[+ ��r .. Li +...r ,• ^�r':t j'• tk p r �;T#7�:. - : ' ��'' .:. (G) Main` . .ems ''Tlatin River :above.'rGaston (river mile al' tribeabaries to ttsa Tualatin paves 'Treatment resulting _• ' in monthly average effluent concert adonis not to exceed :5 mg/1. of BOD and .5. sag%1 of:SS or equi sa�lent control (d), Tualatin River :Subbasino •The` dissolved. Oxygen,level in,the dischar� d effluents Shall not "less than 6,rig/l , (a) Maim stem: Columbia River: (A) . taring summer (May 1 to 0otober 31)3 . Treatment resulting in monthly: average,.aff].uent concentrations not -to exceed 20 mg./l'of BOD and 20, , , .. of SS; or '. equivalent control. (B) During winter ('November 1 to April ,30) A minimum o= secondary treatment or .equivaieft contro3. and.=unless . otherwise`spec fi'cal y authorised by:;the `Depar- - ••.' ;, • operation;'of .all waste treatment end control' facilities-. . ,: r' at maximum practicable efficie c)r an• effectteen eSS `so a3 to minimize ze.waste, discharges: to--pi, blic waters (f) Effluent BOD concentrations in mg/l9 ,divided by the dilution ';•' factor (ratio of receiving stream flow to .e£fluent.:flow) f:::''..''''..'7'...':::.1 '' . : .' :.. ' ' shall not exceed one. (i.) u4sleas •otherwise specifically.- ;- ` apps=red' by the one (4.mental ]icy 'Coismission. _- (g) Sewage wastes ••••' ' ' be disinfected., after. treatmen equivalent to thorough,mixiag frith, sufficient +chloriane to• .provide,a residual of at least I j�lart•peg mill ion a tar 60 fi:'' minute3 of;contact time.:•u�sless`„etYherur3se .specifieal1y authorized by pent. L F E (h .I'ositi�re..;protectioxs-shall ba provided to ;prevent bypassing .,, raw,or4,ix adequately treated aewaagen to pu sl,ic waters un• less i z t otherwise.approved.,,by• the•Degai test where elfi�mianat Lox} m£ .� Y • inflows and infiltration would,.e"rw essary bait_not.•presenxtly '• practicable. v4 . ` p . (i) gore stringent waste treatment•acrd 'cc�trd X requirements say ) be-imposed where .spacial conditions map require r a ftx ` 4 (2) • Industrial wastes: k f' ,{ , 4 ,. �• 1 �` :F 1 ��`ya s a t,fr it E'k� d 't h �� � g�{. ' f.5.: '`{t s - „� ; .. '{`F fir r e r nl ^`” s etk •r�F w S r ku r sr� t t t � :. t- 1.t',+ ,;il ,c `(a), After1maximum,;practicable,J�nplant control, a mini of r� , secondab . treatment or egar ivalent control,( 6ducgion c o£ r = t ra ; 'y r _ , > a x,1 r � �� , Fro az - suspended,solids"and orga'��tic 11..!••"."'.ersal where present; iaa, s�� u J t Significant quantities,. 'eoffecve .d si�afection wher• �a c }t of; `r +' ¢;, ` bacterial erganis�3 of p�i;blic health �ignificatnce are s, �, , g t }: s toxic ;or ether deleterious `4 resent and' control of r . F{� a� , t 1 -4 fiC$ .� � }4 w 4>. •substances)• A # 4a y e4 } rls � i r �. s P" a r'▪ rgt' t t . r z.",5raz gg + t r t*' 48 cy rti . 't 1c s( a .'s.' l{a,,r 'S ° f1'l ::.: ,� _ ° .f d 4"-4‘•'4.''''''Br j, rr F'7�e t `�eft s %t ` :0 �f'K5* ., ,'�, , i .atit. tL 7 g r,'1""y'�''J ,r . ,e ^�%,, 1 "'r9`y.`,.,■d' r 14. . r t,grt ' r'iiV :.- i K5• F:%1: a C �I :„∎ r4,, s t ',r r '• .;r .{ t t 4!.{ p ,t v:, a. K N.: .:i k r s • C r' �E 4 .� a 340-41-455 r 2 -; =cr r7,,,-,:':`•','I ni n>r.�-n �t:'�+Ue ° r ��,,a i �fr. ,T -`�s`{ E� '"Prx. Y��p�1 i • r'". 4441,14,1,:e�'a^t tf ,�,„a i n ,r r�jS ,.•r "1 3�.x,t F'M\tJFi3581 'r' r ' �t x. a r - 'c3 t,iS Z,.1rw l �- 1�'"', 4 +.F4�;;?. p� s s j �, ( aa,� 7 t�''r'i { 3� 3.r, �� ' N tC . -� '. t t!Y y„ k '%nus + i����,,�,,, $ ,1'-3 a k j yA-•Cit4 te r �;.. � ��+ � sz�� t� w ryw s x s'`+"1''�'t�r-�e�'"�', n x az�i a�p�.� �r}} , r{ s" ,r, 't srzi ``v`r kf `+, r .* �t . p F,.y-,, �af : _ �'� { �'7y e .�1rr:Y ah% �,�4,iti k�`hy r�YtF�.'b f'�Y,bA'M"!��;�' �'t�'t,�:{{?���t➢#J''l. .ter,�.• _Q ° t , y ° t M` , S (b) Sp ,.. ,, ; -.;. ecific industrial waste treatment, requirements shall be determined. on an individual bases, in accordance with the previsions o£ this plan, applicable federal requirements, and the followings (A) the uses which are or may`'likely be made o£ the � i receiving stream, , ' (B) The size and nature f the receiving stream;' quantity and quality of wastes to be .treated, and (I)) The presence or absence of other sources of pollution on tche same watershed. t. .'" : : (c) Where industrial, commercial, Or agricultural•efflucnts contain significant quantities of potentially to elements, treatment requirements shall be determined utilizing appropriate bioassays. . ., • (d) Industrial cooling waters containing significant heat toads ,:" shall be subjected to offstream cooling or ,):eat recovery prior to discharge to public waters. '' . ..1'' ' (a) positive protection shall bet provided to prevent bypassing of raw or inadequately treated industrial wastes to any public waters. (f) Facilities shall be provided to prevent and.`contain spills of potentially toxic or hazardous materials anti a positive. • program for contain ent and cleanup of such` spill.s should they occur shall be developed End mantained. Nas-► •i:h sou a of ut,q t canto n t e` .t_.1 we.' sub as;Ix Ja 1989. � � ay► aar��a Band Vie, o .,o�w �: ub.eatox.- f.- � ue r � over and gswego l e__�n deve ®i '.- w.th. t1 f .. � h ba ex eat t o _ dews o _e +t` w f • - • , date /f • • ,e0. to .a. . 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Y---,'',';`1..''::•:..".'.:1.';:.1!'f7';'-'2,7--1'-'-'15•: ". .,,;,,,..„.4,4:„..,„?=,,,,,,•„1,•1.-:;;;:e:•:;..:.:-, ,,,:. :, „.:•,..:t :,..;:..,::::.:.2'..--'•!,,,i,:. ,;,,,.:,•.-.•' .95;7.„.,,.,..:,•:•55:,..-,,,,:<•,,i,I.,,;:•,•:!:.,•,,,,..,.11..,•••,,,..,'.:--•.:.;•--; .,•,-.•:.•,..,,,,•.,,,,,,,•••••:.2,',..-r:'-'•:•, - -, -.. ,,„,y1:1.,•,,,....•;,I. :l.;•:;,!:. ,=',,,,:- -:,:::-.;,.:•:,...; -,-;.iy.:?-..':!.,',:i:c.,:,:: ••,••••••:.': .7, • ...,?..::. .,P:,,,.-••••:.,....-.........• -,;.:„...r. .1... .,..,,.,.. .-..c. ;,..,.j..,(.:.,••••,,.i:,.. -•,,,,,...i,„... .- coNrPNS •. , ', .-. - - . • ' • • • , , - • , ,., .:• : . .,'', ' . . . . , .. , .• . , .. ... , , : -, , , . . - , -, .• . . , • . - - • . . . ... L • " ' - . • •, . . .- - • • . , .. , ., .., • ■ . . , .. . . . , . ■ ._ . , , . . +.. . • ' , • ••.. ,.... •tkivarsal soil Loss Equation .., ,,,. . .. • , , . : Table 2 Cour. , :. . • R.', V- ue , Tila . • ...- - .. . ,- . . ' • - • • . . ' . . of'tlt R d <1 l62.c S 411 Group- -1 ..... , ' . ... - • • .: • ', . . . ,„ . . , ... . Table 4. . ., . , - • , 4 • .. ' . • '. ., . • . . Table 5 "d" Valtha Z IVIA14'• - 1 • '. • • . !•' *. , • • - . . . . . . - . _ . . . - . - :• '.. ''':-: ' ..;;:rt:;: 'Table 6 . "Cn Valus ..„... ..,„ ... Figure 1. Interceptor Swale , ,- • ' . " : ' - : , •::.,. ,. ., ._ • .-'-... • • . .• -. '..-.....,:. - pter Dikes , , ,, . , • ,, , , , . .. . . . ., .. , „ T re0 TemporarY -I.k -'' • , -.• 1' . .}. . . Figure 2 • , , , .. . , • . . . ,. • , , • . , „, - . , • . . . . - . „ .. • 5 . • • • . . . . . . . . , . . • . , . , . . _.,,,,- - , , • .. ,,... . ., . sediment Trap .! • '. , • • ., - . , , , . ,_ . . . ' Figure 4 „..... , - F :. :-. . • igure -c , ' .. • ......• . - . Pipe Slope Draln-1 ' .... • , . . . . , , I,- '.......!.. • , t_on, ••• • , -. - , . , • _. Stabilized Constr...st, . , E a'FigtIre 6 . • . . -• • • . . , ei. '.• . . . . , ,. • . _ . 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' • • ° — . „. .. , ,..,••• . . . _ „ , _ , .. , ... - . c et k s L t r , ,� z, ,, k�, y x Y ii 4+ ... > t F �'x 1 > "' < < G -G ;y Sxr Y�} i R r4 T` 2 X �n,,r3:1,-7, i:'▪ a 'ic. + " . ` 'i ''rt si'.'- z t Q f P't K- °4 tidy. , f,;!:r - l F ..; z K f�ta ,� �s;y.' -4 p;1.. 1 a +• �" i rjX> t k4't S � �tT, 0israca 1 y 4 TA8LL UNNEASr1L SOIL LOSS EOUATIC? - 3 The sediment"storage voi'ume nate,red is the volume ` j �; o -, - ;, nine ttte sell-- " slate •@ vQiumg, -1:,,,,--, required to cantaln me annual sediment yield tCm a(I P a tlepa•tment o rg+cuicur@ Unit' ssal So'! l.oss'Equation (LISLE) dev?l6ped. ,y Where A , annual sedtrraant yield in tans r acre t ` R a rainfall'erosion Inde'x'. sail ' "'ditty factor. from:T'able det�rmin::, by;fib and laboeatory.le g.by`a gecO91St. sail scienur$. or geot@osulc:engoneer: 'LS •: leng h.S 0pe'factor,;frdrftr'fable (note. lengtl :. ;7\,,.' ' • . . ' . :,r '.. '. .r '...' ''.2.' ® view • measured are,horzpntel distanCe tram a plaie ) coy-es faceor. use 1.0 which represents nd grourt •duet. dosing the constFUCtlort;.prroe5. TAe1.f::5 an 3 ♦ ,� erasion C Pn 'factor;use 0;9--w h rdpresen s �� dcwn•slope. (Doze•cleat mar9�d • trecicvrellang up'area! -7 f' parallel to c®ntaurs) -r o Annual sdirgter�t yield • c oaf ca. st bYy-s eP P are' s obt g tEti® � i�a!ue tram the 2��tear/.d -l>our.lsopfwr al Mcnw s, Compute the in TABLE 3 y K b, Divide the site`into areas at ho mogeneous$ . self yp and a ttnrfanae slope acrd, a lgngth. Vi: - s�ls',r.>ha for eactt Bali type. C. iGrigt the K value from the Std chart, able '3 r f I. Determine the l,S value for each uniform area l4ee Table 4 ).• e. Compute the annual sediment yield(A) in tans"per acre far ea,...,_., hoc agenegiaajunefosrre 5 r 9G area by multiplying R tunes the i�and l S velaes Icr each area. t-- - • f, area by ate@ anrsu.�!sEStir Bent• yield (�) for'each area by,the,". ,ie„to ba racla (only ` die cite total annual that area .e be Geare`dl of each area Sum the r @sulYS to centp . ,, sediment load (in tong)'11G line t•�P (�-,� ' x �' ,. Is then determined by dividing th@ rota-"--teal sedia;aent load v _ 3' a The sediment storac�vealue den:) far.the sediment dapascted use 005 tan pct•cubcc'foot. .' w M: (in tons) average oensity �' r tr t S -T ','',.,'''''d..1 i{° s 3 =' r e j T� ,6�A ' .� i, STN. 4 • 7 t h S { , r, + s� t -t . Cd Lf4 - ;{ !nt t Y 5 1 � y 1• ` 1 } 4 ..g F• r.} Y .t � ^ 1rC �. .- . e • ° couniv ;e5`jfi►C 7 ; r sl 6, k7 ` , ° ° 4yo j ► ,-t115J' lips* O .. , -n t1flASt11i1Gt0t0 COtiYtY ass �- --ea; � �•�:/*/ .% ----' -. i(L - i 4 I - : I LOCATION• • p 3�`.. r r i' `,\.•, 'ter ��jl $ < MS , 1 yam' alysr nee` ''. •b ti F Y pp it..,a.t• =I.:•!. l 5 . — d C Y r x # _ 1 r ^t h i \ 1 . ` 9 j� _ � ' "- Z .t ! 1 `may 4 w ..i..,..4-...-7 ` , Gs boa `s k,, •..',---\'' a n t , C r t if w�/gy p ' � • �Y t i X r y I A a h t (�.� .�. ," , , $ )• ' `foN C( 11N v I" ° 9RE-Qty „0 a ' x r x ,x k __ ,5 I 1 90.40D a;�� x N` s _ 5 ';•.`.`c;:-:-`-'•:'''[rFin ; r . _ t r S-t a :� r 3 + �xY- ' ' tb a�- • •R, f v/ wit -rb. ' TABLE 9 HYDROLOGIC SOIL GROUT'OF THE SOILS V�1ASiilIMGT QidJPiYY ' Soil soil Hydro- Erod- Hydro- Er"ud- •, t(ap logic - "o'1 •• y Map logic ib 1 ity • Soil Group Symool Group Factor, "Y Soil roue tlit2 i Group F r acto , ALOHA 1 C 0.43 HUBEktLY 22 U 0 37, AliITY 2 C . 0.32 JO{IY 23 C 0.2 ASTORIA 3 8 u.24 KILCHIS 24 C 0.15 * . E 0.28 KLICKIT:>,T 24G 8 0.1 :,. ,a- BR I�UddELL 4 BRIEDVIELL• S, 8 0.17 KIJAPPA 26 8 0.37 1"" CARLTON 6 3 0.32 LABISH 27 U 0.2 CASCADE 7 ' C 0.37 'LALIRELWOOU 28 8 0.43 C'rtEHALEM t3 C 0.37 MCSEE 30 8 0,28 CHEHALIS 9 U 0.24 MELBOURNE 31 B 0.24 CHEHALIS 10 B 0.37 14r1s LBY . 32 C 0.32 , CORNELIUS 11 C U.37 uLY IC 34 B 0.32 . j,:. KINTON 118 C 0.43 PERVINA 36 C 0.24 CORNELIUS QUA:TM'Ua 37 C 0.37 VARIANT 12 C 0.37 SAUI'i 38 C 0.32 COVE 13 U 0.28 TOLKE 39 - 8 0.28 COVE 14 U 0.17 lit:IFLUVENTS 40 a 0.17 - q l�aYTOId 15 , U 0.43 VERBUORtT 42 U 0.28 I. _ --44:ENA 16 U 0.43 WAPATO 43 U 0.32 , GOBLE 17 C 0.37 'el ILLAI4ETTE ' 44 B 0.32 -.* GOBLE 1 H' C - 0.37 WO0i0BUkN 45 C 0.32 HELVETIA 19 C 0.37. XEROCHREPTS 46 B 0.43 HEMBIIE 20 8 0.32 HAPLOXEROLLS 401= C 0.32 HILL SBOitO 21 8 0.49 XERUl:HRl<PTS • 47 0 0.02 RUCK OUTCROP 47U NA 0.02- HYORCi CGtC SOIL.GROUP CLASSIFICATIONS ° ;, It wetAd.and C°6143, t gag F! A. (taw runoff paAenuall• Sods havlagg high Infiltration rates.even he en tndroughty !°' cruelly of deep.wall-to-exoes�ely drained sands c gravels, These sods have a huh rate of water Irartsms „ ralOderate infiltration rates wrtan thorough ly•wetted•"and d S. (Moderately low rttu Qtf�tattely Sods tetitures. These sods r eve a rttodertt®.Fete a:f usistutg ettte�y al moderately tlrta tt!r„odetatut+y;soars® 0 water tRafls ThS5 Oe. ~ fii $Oils h virtg stow lnlieirattt3tt rates wttett tttoraugszsy wBiLed.Snit ; -•I C. cons eratly rigtt ntrtotf p wet t a l ea downward reteaere cu of water ar s wrttt moderately cans�tunq chiefly tat sm��ssre as�y�that�ttped � , line to line texiwes. These sods Qtav®a slow rate al waist trartstau vet* slow rates wen tttorougnty welted artd con. n1,3 , F e) :.: 0. (High runoff Potential). Said€eavueg / . '''',.'it' cruelly a!day sods wort a tAgh swelling potential, sods with a partnartant'nigh water taut., SOBS wet?a i w Sods over n arlt/.I perviOsus t+tateival. These yod4 s ! hardtsart or clay layer at of near flee stuface•and stsa�tW f � water transmission. , "_ have a very stow'raid of � From SCS '' P a' k A' t y .c' sip-" d it 21•. r u n k 1\ L t � t t Y llY ri• ZA 1Z LJ V J U i�0* 2018.2 ORB+c0ii ti • • t 5F: it 1 ..11411A1 A i? - v if • r .0.- Jk li,q:y ya • Revised•Febs+sesy 1986 ' SR.0P1L IL.R7IGIE lH FMY37' 22Q0 2400 . 260�J , SOQ 1000 1200 1300 1400 1600 1800 2000. - 500 550 600 700 __ 0.135 0.14 0.14 0:14 • 0 145 1 0.10 0.105 0.11 x.11' 9.115 0.12 0.1.2 0.1.25 0.13 0.13 J 0.•135 r 0.14 9.14 0.17.5 0.15 0:18 .0.185 7.11 0.11 0.1.15 Q.12 0.125 0.13 0.13. 0.16 16 0.17 '0.1,7 0. 0.34 e X0.27 0.28 0.-28 0.30 0.31 ©. 2 0.51 0.52• n: J.13 0.13 0.14 0.14 0,1w 0.15 ,..0.16.--�1� 0:53 • 3.21. 0.22 0.34 0.23 Q.24 0 0 26 .1 4 0.44 0.46 0.48 0.-- 0.76 1.33 0.33 0.34 ^Q, 0 r 2.40 0.42 0. t9 0.62 0.63 1.21 1.27 1.32 1•38 1.42 1.47 }.46 0.48 0.49 j• 0.51 0.54 0•57 0.60 .08 1.12 1.115 2•.27 2:39. :62 . 2.73 0.76 0.79 !0.82 0.87 0.92 1.00 1.93 2.00 2.14 2.51' 2 1.2^ -•1.25 1.31 1.41 1.51 1.631 1.85 3.29 3:42 �.'2 2.33 2.42 2.51 2.69 2.85 3.00` 3.55 " 4.03• 4,20 ' 1...9.9:-.! "1.57 1.65 1.78 1.33 2x97 3.08 3.29 3.49 3.68• . 4.64 5.05 184 , 1.93 2.02 2.18 2.30 2.60 23..4653 3.57 3.70, . 3.96 4.20 4.43 .6 5 97' 2.62 2.32,1 2,.42 2.62 2.10 3.10 4.06 4.22 4•38 ' 4.68 4.97 5.23' 5. 9.` 2.62 2:75 _ 2.87-.,_._3.10 3.83 6 28 4.69 5.42 5.75 6:06` 6:36. ..+56,u76'43,,___ 6.91 3. 1 58 3.83 4:28 4.69 3..03 la 3.32 ' ? 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'"- s : t' ''.5'4-...•,': T•y {/:` �I• + ,r.Rti p dry. r . {!- t t[ 1 r: a p m',. fi vs' a .0. ° . -' .&'' Yi . � { ,, .` ;-. w •.:ni . ss�'+ "' *t,c '..$ is � ' .t rF l in"l';tf,la�X 'krNis ;,-. rd ,{r ,ti C .,-- '3 �nr,l c�' ` fit+" j� t t araT:.Ace t9 ar ' xr r;o , rNry .", ,r4 9 K. +a tif+f,�I''a t,il ,., a. > r 1 yY I } C � d r""�k 4. e,n ,t y ''C' �l.tlLUES MU4.C1�1 FACTORS " t-� Type aF. Mukn Loud Facto' Length mulch Rote lose G limit Tons por acre 2erc�ni' FraP None 0 x'411' 1.0 straw .ar.':hay, 1.0 15 0:20' 200 tied do.rn by oncltaring and tacking, 1.5 1.5 12 300` . equipment'• 1.5 610 :12 X13'0 pp, 2.0 •1�5 Aid 400 : ., 2'.0 6.10 .as ,:aoo " W S 2.0 11x15 .07 150 2.0' 16>20 .1�.1 100 2.0 2125 :14 75 2 0 26.33 .17 50 s+ 2.0 34-50.. .20 35 '� Crushed stone, 135 x:16 .05 300 ;. x !i to 1?2 in .135 16.20 .05 •150 >. � •135. ,11:33 .05 ,•100• . .. J +,. 135. 3.4°50 •05 75 ,rn 00. 240 X21 .02 200 .*,, • 240 21-33 .07 200 Z4 _ :150 r - - -- ° 'illiaod chips 7 �<!6 . � 7 16-20 .0 50• .. s 12 "<16 .03 r,,150 '•0®. 12 16;,20' .15 100 ti' Oa. 25 <16 :0 00 ,$ r 4 �•t' 0 25 16.20. .02 1513 aa" ' , 25 31 33 .02 100 - �_ 25 3.-S0 .02 75 � ' tram Meyer and Parts (24). Oavelapad,by an,In4�eragt:n�o 4 shop group on the basis of bola:elsereestc+e cne' limit'ttdt reseo 7,,.,i;,r`�rt s r, ,.;." 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' .vr , ,' , r• f '''bs {" w ° ')4ia��"!it x 1,+,Y i a ' f 0' .x ,•� c. rC }" f it 'z v4'7, xJ^ .S ',)1 a r ..r r F r= >ti ▪ Y ''. i�' rat S{ ' r(•• rh 1 -1" .4^,XV F( .* i•w, .Y i r qy '• .r`-i f- o Ycs b s �F Jy..mkt,YF.r3 s 5� P ik ! !+'r l"` * t rr' ti. t 1 ''4, z •t y -st, «u Id 4;ro g ^�«4' : �' 4,;,,,t,...,;.1 , u..y. t "tFStr 14 �y� i of r� r �$eta °� � ,a t,.r,. � • s..ef.t�#t�i' Aa."-.' '4. .:�`��'.t Wit. ,t:, :� • t .• ,a - - .� a a.. . .. . v n t i '!J4 ' '• H .>w {C .. j S i ",. altt 4 3 t 7. Y f+ u J r ,f).,,,•,,,‘,!,,..,'Gw v t :� G ✓ ) r/ x b$e i # a Lt'r.1 :"44) t n ai�er nt?of,tha e, l8 a O,n J • rlE i> CUIfB Se : :t ' t ?ra3:y S tY. '' Rau les related. to C nmerit n activities witl in the Tualatin ,River }Masan t O on 1" Ea 'a ra l;�, ) Quality assign dixr %ves t e es> ' be.'in effect,by January 1, 1990. I cation: City-wade. a. Public hearing urns v 5., There were no declarati '' lenges., c, eni er rla L.den, s ized '' item. ,Tn late July,` tt .State irc xrt-,al -,qty;, sloe (EQC) :adopted new regulations'pertaining;to non-Po a pollution caused new develo Buent. ; The ; ;.regulations fly to .construed 2 7 ,in the l ialatin Ri Basin'.four which alp ;i a Lion � sulrmutted after January 1, 1990. . ' lie .'• to add ,the regulations, >>' 'he Pla c sion cousideted (Z( 89-03) at t eir r t ing on ber 17', 1989. The 89C is alp ac i .pots rules :which { d additional r on new ' l s, including a rdditio ernt for peen water hart far s de el o} tt�enth.' d. Public Test xcny: None. ;• er. S'taff re tm ended ci 1, - amendment as. ` recc m by tine Pl;anni c i sign. f. Public 'heariing was clod. g consideration by mil' ORDINANCE NO. 89-27 `I0 GiAPT R . .18.90, P FOF C� S'I'AM lRDS, OF ' � S7 MC. ' D ' �DFfiik3d2 E AND SEE AN .�+ : �? Y�A`�?E. (AAA 89-03) Tuition by Councilor J Qne seconded filar F4don,.,` ► adopt Ordi nay No. 89-27.. The aiaticn apg ed a., unam s of council present to !Sea 44 - q' p li,v a. • D'I'Y aGYTi�t� Y 3G F�Ai3 ll' - . 6._.•,,198 9 }- P. ','.� " 4 ." t „f 1 L r n .,�uh ,k t f s t! 4 • :r/ ,ifs tit i:,t.'., F � i a 999999 } 5 , , -- , . . . . .. CITY OF TIGARD, OREGON COUNCIL AGENDA ITEM SUMMARY �� -� AGENDA OF November 6, 1989 DATE SUBMITTED October 27, 1989 , ISSUE/AGENDA TITLE: Zone 'Ordinanc- PREVIOUS ACTION:Plannin• commission ‘)]A Amendment ti 4.•.'g ,24 ;&?1.. ',^ / I hearing on 10/17/89 ;, 111114 l PREPARED B :7 .1 e*.rah:Stu i �( i. �� ti DEPT MEAD o'`I►\ CITY ADMIN ON d/1/// REQUESTED 16q— --_------it rmi i� ---__=-- P'LICY ISSUE Should the Tigard Comprehensive pla., volume 3, the Community Development Code be amended to incorporate recently adopted state law pertaining to non-point ' . ' source pollution caused by new development? JJ 6-0E-44-1'�`" ,= e-----====--= = =re=st-===e=(ate.---- =================== .: � INFORMATION SUMMARY In late July, the state Environmental Quality Commission (EQC) adopted new regulations pertaining to non-point source pollution caused by new development. . The new regulations apply to construction projects in the Tualatin River Basin for which an application is submitted after January 1, 1990. The City is required to adopt these regulations. The Planning Commission considered these amendments (ZOA 89-03) at their regular meeting on October 17, 1989. - The EQC is also considering potential rules which would put additional : e requirements on new developments, including a requirement for permanent storm, ''' water treatment for some developments. These rules will likely be considered in November by the EQC and may later be adopted by the City. The present rules can be found in OAR 340-41-455(3) Attached are the proposed changes ("Exhibit A") to Community Development Code ..' Chapter 18.90, Environmental Performance Standards; an ordinance adopting the { amendment; and a copy of the state regulations (attachment B). New proposed wording is indicated by underlines. No wording is proposed to be deleted from e this chapter. -_____ ====__== =====---====m===--====== -====s------_,- ': ALTERNATIVES CONSIDERED m 1. Adopt the proposed amendment as recommended by the Planning Commission. W+ 2. Modify the proposed amendment. 3. Deny the proposed amendment. �. -- - -.••_ r =a================= =- __ - - FISCAL:. IMPACT. These regulations affect the cost of development, as well as the costs of': maintaining public streets and storm water facilities. t , SUGGESTED ACT/ON 1. Adopt the proposed amendment as recommended by the Planning Commission. - , 1 .. ._ . .. .: ., � ,. ,. ., . 1 : .. .. ®� :tea . spa 1 . ' Ai R.ORIBTNANCE 'TO AMIENP3.,CdiRPTTER 18.:90,••Et/"IRfiNME&T,AL:'pEY�*?K)(2M.'�NCE•STAND. .- . T RUNITY''DEVELOPMENT: C ODE °2 D 'SET'T'ING ;AN EFFECTILTE .DATE. t , THS..�TG�lIdD .CON!! is AS : :.'.the• Cit o€... Tigard. f ixidf3. it :necessary:'' �o..Bevis :-:csts .;co ►iaiite::.' .: ": :: .• - ii�RE o. . . Y , DevelopaioEt Cone "neriodiaiFlly. tca improve; the operataon 'and' ic�plernehtation of . , , '•k. • the Code F aid ,• ndin ga'':'i6.-.::t'�e•,C3.ty'`.=of.:. .: :• :• .d 6iHEFtEF1S,. ;the. s'�'�nning:.:etaf'f made recommendation. i.• € g Tisgara. p .area�is:g'•Canmr►ise3.on at. t�:eir rer�.niar meeting' on October 17•s 1989,•• 'and . ;.. •_ F�iERS2�, t4�e' Tigard'Cit;�.•Courc�il teed. a: pix�l3.c.;h'ea'r3:slg c�ra •ti�ae�pz�olsor��d ohaaajee :,, ,'..::.,"'";',"!..,.7:,. at'z.th r 'gu:lar meetins� a�n •November 6, .1989. ' • ' Not:•TF a1 'O!8E., T E: CI`l'Y' OF TIGA12� O12DAINS AS 'FOLLOWS . y •.. . SISCTION. 1: -.Chapter 178.90 of the Tigard M4snicLp31 `Code•shall ale amended as'•-i ' '• shown in, Exhibit "A's. -Lan uago to Vie' deleted '3 s ehowai" in c.h (BUAOKETS]. .Language .to be•added is';g,D 31GlZLIR*E1.3 a . H. SEC`bION 2:. This ordinance thall be e€ ective�,.on and. after1:a,�;�3OU1 shay.; ..•after its• passage by that •Couneilt.:.......,: ppro al. by fibs:.liayor and, `: , posting by. file ,Rocorc!er: PASS D': • �y I-, vats,of .all .Council 'uiembex s present' ai r be .ng . :: • read by •nuzaber and title only, thiii dy.•o€ . ' .. . 1 , tber ate.;Wheatleiy; Deputy Citg: t rder 2 PRO Th3 a day o€ • Geralrl.'R., Edwards;.Mayor • z Approved ,a0..to form: r ifi o , �p� e .:' :, :..'.. t A4.torn . Y ...•16.1 ' �� Date .: .'' - arc:`: ORDINANCE wo 89 - .}'. 1 r r k .'M1,•r.r • i : • , —.••••'.% 7''tir,. k — r•ih I ' F'tr,a.�-,`.Yi _ _ i� •i. 7 y._ .. r�k 3 , .:..,-.-„,,_. ..:: ,' ' j',' .,-,. .:',,,-.-. , '+',.,„ ,,''.'.'-', -1:::..,:....,', ' .. - -, 4. - ., , ' ' '". '. '' "—!'-'..,'.. ..,-, ..- ‘-',,'.,.....',7'''.-.,,AW''''.'Yr "` C t h h Y °EXIST"' pig N Chapter "18` 90 lj • 7, Ct, ENVII 0NMENTAL PERLOR2+ANCE dT NDABDS Sections• r1 18:"90,010 Purpose 18.90.07O General Rrovisions 18.90.0D0 Noise x,8.90.©'40• Visible Emissions', ' 38.90.050 Vibration 18.90.060 Odors 18.90...050 Glare 'and Heat. 8.90.080 3 nsects seed Roue A 1 u 6:901.010 prpose " A. The purpose of this" chapter is. to. apply the federal and estate onviresnmental laws, "rules,. and regulations. to."'development within tLU7; ,: " Gitiy of'Tigard, (Ord.. .89-06; Ord. 83-52) " r 18.90.020 General "Provisl ons A. In addition to the regulations adopted ,in; this "chapter, ;each 'use, ' activity, or operatio�s,<�xithin .the;City of Tigard' "shall comp .y ;with the' applicable state and federal standards pertaining .'to Heise; odor, and" ' discharge of matter into the atmosphere, ,-.groa�nd, sewer tryst , ,;or f stream. • 1: Rey lotions ado.ted b the "State "Environmental . • al,t• ' OomnY+�ssioY pertain'ina to non-mint. source s�bllatios► eo�atro3 and contgined in the Oregon Administrative Rules" shall,by th ,s. refeicencca sm de a -art of.this chapter. ' B. Prior to issuance of a building :permit,", the Direcrtor ' Yay require submission of evidence demonstrating compliance.;with 'state, federal,;; and local environmental l regulations and receipt" 'of Ynerlaaary permiis t .:,,,,,,,t,,,,::.:„,,,,:,...., Air Contaminant Discharge Permits'' (AcDP' sr '' .X' dir,act '-solitve 0., Construction Permits .(YSCR). F t 4 ";` C. compliance with state, federal,' ,and local envixsin aental regulati.ca as is: ' ;` -4;''. -.. a thee continuing obligation csf the property'�oaaner and op®rat®r.� dOrci. i. u 89-06; Ord. 84-24; Ord. 83-52p i'` s k J 18.90.030 Noise t a . A. The following additional restrictions are. incorporated with the State • Department of Environmental Quality (DEQ) ::standards 'for..purposss df 4 x R•,L rJ ^' ,,t .f City noise regulation: +�, +s + f il { srr $ ' r �� . dr { F + ; 7 �r x' rte�1i h +rk`�Sr� +�F: t n J' a) r ' tX yil .j �. Y, t . !,� ti: nµs 1 "r o n t zi .. (! k t f ,";,,. r; a y4. a'e 4?dt`'+ h t , . .i rho k,q• b 3 t , iq' S� ,..;, n 'v.Gig`� � 1st �;u t 'S4F, F ri.' is - '�� 1�1 l''''''''': '� 4frk h 1 by Y t k f {I l o'` `Far .purposes o� rneasuri.ng, 'permLtted '`Bound, leveli3 from noise generating .sources under the: pro.ieions, of DEQ rules any .poet where noise sensitive;` lsuildthg `.could be 'constructed under the provisions of this .title!: shall apply as If.`'such point contained a`, noise sensitive ,buiiding; 2. Within the' °industrial park (.I-F) zoning ,d1r.str3;ot, each property or;, ri a building:° under ae arate`.:,ovnershi ` from..°;a noise generating source-::. ,ehal'l be;considered a noise�'-.sensiti.ve property under the provision of DEQ'rules with the exception th t the alloyv.able' ...levels ms:�' E be increased by five db; ;and 4 3 The' .construction including excavation, demolition,.' alter_atio , or repair' of any building, except where a special .perm�� hays ,_been ' issued by the Director under the provin;ones of`,sections ''18-.90u.020, other than betwe en the hours of '7;00 ,a.m. and 9 0iB p.m. which involves any loud, disturbing, or unnecessary r:ci ie in the. city, shall be deemed disorderly conduct_ and there€ore unlawful. (Ord. 89=-;06 F Ord. 18.90.040 _ Visible Emissions . A. Within the commercial zoning districts anti the industrial. `park ,zoning district, there shall 'be no 'use, alteration,,'. or activity -zhich results; - , in a stack or other point source,'emissioa., other than an,emission`fray► ' 'space 'heating, or the emission ai pure unca�nbinecl water. (steam) s hich: is visible from a property line. 'Department of F�nvizonmasita7l: Quality.? rules for visible emissions (340-21-01.5 and. 340-28-070) .apply'. (Ord. 89-06; Ord. 84-24; Ord. '83-a2) 18.90.050 `libration A. Na vibration other than that caused by highhrray ,.vehicles, trains, and-. aircraft is permitted-in any given zoning district which,i.s."discerthible without instruments at the property line of the use concerned. . (•rd 89-06; Ord. 83-52) Y 18.90.060 Odors A. The emission of odorous gases or Other matter in,;such quantities es to �' be readily detectable at any point beyond, the' ra y y po y. 3P y .iris of the see°`- N creating the odors is prohibited.'. DEQ. rul es for odors (340 028..-090)4'; apply (Orel. 89-06; Ord. 84-24; Ord. 83-52);• r ` .18.90.03( Glare and Feat A. No direct or, sky-reflected glare, whether •fram floodlights r from.hie�h {'t' temperature processes such as combustion or welding or ,otherwise, whi®b . ,,, ; in visible at the lot line. »hall' be paermitted, ,and k7j i „ 1. There shall be no 'emission; or transmis ice of heat or heated lair • which is discernible at the lot'.line,of 'the sox1rceF� and } rt 1 AG, kXY ' �, r 7 zw 4 i . t- -r a r } �r�g , ' h , t r rf .:c s- 1i , rr 4 3 , y_ �,,-S 4q K � M r it ''',,,,,'-'1.: 1 r c t s !k«' � �' x `y`.� xaY 4 '� e =tf a 7t+', 1 So t,," xrV.taA ' 't } i '.,9+ ? 1 '4','..,',',1.1.',;i:417 '�t- A?C,S� G 2 tf'h ti x r .i ..;,,x' -. s.-,...., s :.sp:'..,v . ..-',,," ,.,:'..:,' ,....,1'.'`.1...:.,;•:.,....s1,;''. 1'..:''':,'1.: ',:-: .--',..' ''.:' ,...,- , •.,-. . 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'�c��.lect��` . 1S��13-k�eY. . to be rtra�cispo ff - :eat �. � r,,.• �i�ras�:�A rY.• .. .. . ... . ' se�dlmle�tt..tl . ::: , :. - . , . ,: y .: . , ,, - o�errtf3l; ]: ts .. Wtall :.., ... 6Y1G - e ,�1�Y1..'Ch . COC9.a.tL7s' eAt' A, A�': �]E:r- ri ;�tha;'sedlfm base - ' eAtisii.' g�rcd - .. -. .. -. rite' _.•p �e :'tea , .. _ be reu�oved:. _ .- .• ... : . .:. .. s ' .can. asui ". ... t;b:lS�.IIS• Ge lie. , P" Cl3Ata,,. L' • . .. YeveAt erosion.• &Y'tfl. OT ''�. r: es� :.: trf9C.. derv. r • ��,� •A soil.'.er®sf ,�� ��� `riri:5i�:c�sari Ax: �� .. _ y 'sofa. ;mot _on` `ax.t3r ppY .;-•ova .':� ,:.. tni ..,. tae p , � . tecaYy actor mi)dify pp y odl' e E2fr e.' sm�► ``':'; � - .ySY.Q�nI: - r rq - :VV .. . _..... -' .. '. �• �vizanta�:. ity .... 71e:�:t�:`a .1�• ie :for Rp: pp ... .. as : c�nre�, •r : • n appz a ied`..;.p•`r. r. a�aoei �i2m.,xa a E t►em:t.t.:a� ie p aF.P2 rmP3S . '.: '• .. 1..'tr:sds cti.ors 'a• x t , t ;,:a : f y . .Q, 4 ao ,:' a n that. arc% .a • apply 3s • .f . . • • • • • { • V.I 4. t may. t , • t Vii. } ,. 4 ; 4 • - - • i2 it . • f a' .. ,p( 5t ,i. . .fi��+ 3t •,..� �h ' f y a t f '''''''"'":-•,.., ,,,, 7 a � d 1 ` '.•'� t� t7 ' ? kt4 `' -'.;:.."-,,,•1',,..::,'..,•., lF ���. � , i 4 C • trt S G i � . ,. ' ( ifs ` 1 i S f �Y ( t) l Z t li Table Z Universal Soil Loss Equation uu ( w biY `c W bam �1' es as Valu o Table .': � Table 3 Hydrologic Soa 1` Croup o tie Soils 4 Table'4 I.5 Values Table ,S "C" Values Mulch Factors ) Table 6 "C" Values Figuire 1, Intercept®r Swale Figure Temporary Interceptor Dikes t; Figure 3 Level. Spreader , Figure 4' Sediment 'Trap Fi ure 5. Pipe Slope Drains , igure',6 Pipe' xed Construction Entrance, s r .7 r t fl f ! °' A 3,i �� . uc5169 r �`.'¢� n fib. fy ;fit•r ( � y > r '� — �q'. ; -t 4 S�1•i } j � A } �µ',d t a SABLE:t �LOtdiVEASAL SOtt.t_OSS EQdJATJON ' ur►ent storage vofurne regwreCt Is the vsslume E'o 4JVtinu the.sedirreen ac v time The sec!' estu ated`bY,ustrgg the 4. lain the annual sediment,yield`to the asap.arid car!, Unn$irrs l con E u nnu (LISLE)developed by,the Uatded States aepa rtmene of Agriculture' =Unuvers�'t So+�boss c( A = Ri( tSoafR A annual sediment y�ekt in,tons per acre Vllhere , rainfall'erosion°index sibctibatty factor frost Table .3 solo K by field and laborat ''• testing by a 9 engineer' ' . orgeocectt Tie a (note.lengths ` t 5 - t onto(dt ar ze from a plan view), cover factor.use tO v4 ich represents no gr ;cover = dunflg the.cosascrt ,process. TAEt.lE aea s ettsat op and dQw far'e toC use w represents, control practice loe. peter cwt cPy :2 dOtreikng up sp parade:to contours). Annual sediment yield eateWation, step-by step procedure: o ears fur lsapfuvtal Map obtainIn the R Talus'from the 2 3E /. compote the R value by 9 ar ;t ' .. in TABLE.2 the Sift.tilt®aCeaS Of homogeneous SCS.soil t re and of t nufd rn sfcipe acid Divide length- o. 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T'3yz�+ ? f 7 f d + r 'Y a a 4�,'�'yTi�+'r�ka +r dL +� w i , ! rr° J;t ix Ft � tit tsv �+r` 5, 4 a. .mss?24'1 ns 't.x t Q4e s'd,� i y 4� rt .a?'el:(... • y d f ' 4, .J■..,. .. .. .., , ,,,, , ' t ..,• ,• , ',„ , ' . ,= , ', . , ,.,.. ., , , , , , . ,r ., , ,, . ., . , ,, .,',. . , , ,,,, , , • , , ," , '' ,, ' , ' ''' ' , . ' .... ... •••. . ..• ' ,, , . r, , . .,, . , , ,r ., ... CITY coOFIlriirci 1 f r, . November! . 2, 1989 . . 'Honorable Mayor & City , d r Cathy Wheatley, City Recorder . ...-..::: '....,' . FROM: ' Cathy '' • .' . f Proposed Ordinance SUBJECT: Agenda' Item No. 5 - Amendment to Exhibit, B cs, . .. . ... .. .. . , . . . ..t.:':2,:f''1.....::''''.......:'' ' ' • Attaciledplease find' an amended Exhibit.B to the proposed ordinance for 'Agenda, - ' - Item No. 5 pertaining to EQC rules for storm water. This information was received ,from the EQC after your packets were prepared. Please .discard. that Exhibit bit B which was sent to you earlier' . , • . , . . . ,, . .. .. . .. • . • .- . Thanks. . , . , . .• cw . .- . . - . '....4.-.-.'. . 7. • . , . .-:.-•.:-...,... ...„ ..... . ... ..,.... . . . , - - ..- ...... . .. . . .- -.•1 • . • ....". 0 A • r • r r r •• ,:.:,..;'...1..., .. r, . • .. . 1: 0 r . ..,i.,'•:.• r r0 . .,,, , r ;. , ., r . : ..•'`;, r , I r -.' F. • .-- ." -- . .. • . '', _, -,, ...-, - 0 . •. 11,41 . . . . , . . .. • - . - .. , • . . , , , . . . , . .. -..-',- •- , , . • f ' ,. ...'- "r•. . • , , , . . = , • • , .. . . , . . . • . .1.• , ,. •••. 1 ,, • . L . . ,. , . .' . . .i. . , , - "•• •.• L 4. ' , . • • ' , . . • , . , . , , •.t, ,. ., , . , , L , „ ,, '•, , ''', .•.•'''' , . ,' ' .. , .. .,, ..,,,,., ,, ,,,,, '' .' ''' •' , . . „. ,. L . , , ,,,, .,_ ' L ,,, , , . , ,. ,., ..,L__, . ., .. • • , ,. . , •• • I/ . • - . _ .., • • . .,. .. . ., ..- : ••_••. ,.•■•• . .• • 4 � . A . ,I.'' f,71� (,� i l''''''' '�� _,,,,t,„,,,L ) . '"�� —)44.,6 ;, -.4a te I "� inlr%� kp.;ti-1-' rI �. . ? 22) 25) H H t ed Secretary of; te: 7-48-89; EQC-Meeti r�c,� .7-217-897-',';'- , ai Note: Bracketed Z '1 Material is proposed to be deleted.ti Underlines . materials 'is proposed to be,inserted. DEFINITIONS .Y 340-41-006 Definitions applicable to all basins unless context requires otherwise: (1) "BOD" means 5-day 20", Q. Biochemical Oxygen .Demand. (2) "DEQ"' or "Department" means the Oregon State Department of :w Environmental Quality. (3) "DO" means dissolved oxygen. (4) "EQC"- means the. Oregon State Environmental.Quality Commission. (5) "Estuarine •waters" means all mixed fresh and oceanic waters in estuaries or bays from the point of oceanic water intrusion a_ ' inland to a line connecting the outermost points of the .headlan.ds or protective jetties (6) "Industrial waste" means any liquid, . gaseous, ,radioective, or • solid waste substance or a-combination thereof resulting from any, process of industry, manufacturing, trade, or business, or-from the development any natural resources. (7) "Marine waters" means all oceanic, offshore waters outside of estuaries, or bays and within the territorial limits of the State of Oregon. (8) "mg/1" means milligrams per liter. (9) "Pollution" means such centaminatlon.or other alteration of the ' physical, chemical, or biological properties of any waters of the state, including change in temperature, taste, color, turbidity,, Silt, or odor pf the waters,, or such radioactive of other ` a, substance into any waters of the state which either by itself or. in connection with any other substance present, will or can co i reasonably be expected to create a public,nuisance or render such waters harmful, detrimental, or injurious to public health,. safety., 'or,•welfare,,or to•domestic;. 'cotemoxcial,.;„.;industrial,, .0 . agricultural, lrecreational, or other,:legitimate'beneficial uses' or to livestock, wildlife, fish or other aquatic life, or the, f. habitat thereof.; it a (10) "Public water” means•'th© same as "waters of the state". . it (11) "Sewage" means the water-carried human or animal-was,te from i -::� .., residences, buildings, industrial establishments, or.other,places 1 • = together with such groundwater infiltration and surface water ,as .. 340-41-006 1 PM\WH3582 0,..._ , z`. .4 y+ *.:1 7'''''1,!'1',4;a {'1 F A d may present.. The admixture .with'sewage ..as here] defined of .,. industrial wastes or wastes, as defined in sections,?(6) and' .(i3) of this rile, shall;also'.be considered "sewage^ within the .. meaning of this division.; , (12). "SS" means ,suspended solids (13) "West:s" means sewage, industrial wastes, and all other liquid, '- gaseous, solid, radioactive, or other substances which will.;or . may cause pollution or tend to cause pollution;of.any water of ' the state: i' (14) "Waters of the state" include lakes,; bays, !on", impounding reservoirs, springs, wells, rivers, ;streams, creeks;' estuaries,. marshes, inlets, canals, the Pacific Ocean within the territorial limits of the State of Oregon,♦;and all other bodies of..surface or - underground waters, natural or' artificial, inland or coastal, - fresh or salt, public or;private (except .thosee private ,sues ; which do not combine or effect a junction with natural' surface or • ' underground waters), which are wholly or ;partially within or '' bordering the state,or within its jurisdiction. (15) "Low flow period" means the flows in a stream_ resulting frost. primarily groundwater discharge or baseflows augmented from 1a ea j K and storage projects during the driest period of the 'year The• =y dry weather period varies across •the state ,according: to climate and topography. Wherever the low flog period ;is indicates'•in.rise'.. Water Quality Manageisent 'Plans, this.period; has..been,<':,approximated by the inclusive months. Where applicable in a waste. dfischarge' pek'*ait, the low flow period may be further defined., (16) "Secondary treatments as the following context mmay require for,.' (a) "Sewage wastes means the minimum level. t treatment ; :: mandated by EPA regulations pursuasat to," be Laos ,92 5130;:' (b) "Industrial and other waste , , . ,. " to saurcas" �.mgly`control equivalent to best practicable treatment ;(BPT) _,,",-.",,..,;= ,.. ..,".., '.:' ; ',":-!,. a -: (17) "Nonpoint Sources" refers :o diffuse oar uaiconfinod sources of ;. k ?' pollution where wastes can either enter into or die conveyed;by,r Y the movement of water to - public Waters.'. , wk 4; L '. ., ± Y n t o k{ ix'� 1 Ivy (18) Loading rapacity PLC): Ths greatest amount of .=loadin� ,that a, water y, ,s ,;. ta can receive 'without violating water.quality stn lards • t ,sr in E5 (19) Load Allocation (LA): The .portion of a receiving water';s loading t ..`. ,xJ, s` capacity that is attributed either to one °of,Sts existing`wor' ;x future non-point sources of pollution or "t© nature]. ac Cgroui�d + b _�'�` '- sources. Lead allocations are best'estimates of tl:e 'load"3ng, . } 1" ' which may range from.•... rea�sana'bly`accurate estimates ter •grass r. N }. allotments, depenuing on the availability of data ardk+appropr€ate xx "';, • j .. 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' - , .itlii3582' r - . . - , •:'-', --..r,:z•-•,-,/,'-‘,' ,-,..,-1.„',...-i ", ' ' '.'2: * ',,'• ' '----';'',•-r','' ''', •:','' .: - , *- •••., . . :. ,t,:, ..'.• .-' . -- ; e a t :w a > Note Bracketed .,[ ] material is proposed to be deleted,` ' w•Underlines ' materials is :proposed to"be inserted is COE TROL :Of' i1A�TES . MINIMUM DESIGN CRITER� FOnt TREATH�]T � r 340-k1-455 3 ` Subject to the implementation program stet forth ih rule, 340-4.1 120, prior, to discharge of any wasted from any new or `modified facility;to any waters . of the Willamette ,River Basin, such-wastes shall-'oe 'treate3 'and controller in` facilities designed. in accordance with".the .fallowing minimum criteria , C1?n designing treatment facilities, average conditions'and a ,normal range, " of variability are. generally used. in establishing ;design criteria: A i' facility ones completed and placed in "operation should operate at.;or near the, design limit most of the time, butLinay opexat�3, below the, design. criteria limit,'at tines due to variables which are unpredictable or uncontrollable. This i$ partfi.cularly tree for biological, treatment facilities. The actual operating limits are. intended t0 -be es'tablisbed by permit pursuant to .01(5>468. 40 and recognize that the actual perforeaance • ,'` .'` •level may at` times be less than the design criteria.):: (1) Sewage wastes: (a) Willamette River and" tributaries except Tualatin diver ' Subbasin: ( ) . During periods of low stream flows `(approximately. tray 1_, ' to October 31): Treatiaer��: resulting in monthly average :,r effluent concentrations not to exceed 10 "img/I .9.,:.,fEOD . ; .. .'`=. and 10 mg/I of SS o•r equivalent control. (B) During the period of high s+tre , flows (apexoximately November 1 to April, 30):` A minimum. of sacendary treattment or equivalent,,control ;and:`uxxless otherw se specifically;aut►otized by the Departaaent,. operation ®£. all waste treat�aexnt and;control : acilitie. .at maximum y practical efficiency .and ef' ecti�venes5 so as to , , ' minimize waste discharges ".to• pubAis waters. (b) iai.n stem Tualatin River from mouth to Gaston (river mi.Ie 0 =' to 65) 7t '(A) During eriods of low stream- flows°(approximately J �. P to October 31) Treatment resulting 'in.mouthly average LP ,ffluent.'concentrations not to eacceed�1 mg/I of Bqt t k and 10 mg/i of SS:or. equivalent control'. ,, (B) ` During the period of high stream,g ows (approximate)y s ` November 1 to'"April 30), Treatment eesu) g � t. monthly average effluent ctgncentrat`ions not do exceed >, r, < 42 • t 20 uig/I of 80D an 20 mg�l of. SS or equivalent�'coritro3 ,� < 4 . t` il 4 kk $C.f �!r ? 1 to' t I ) f y ek i. v [' 340-41-455 1, ' ., a1 > t ; t a PM`�WR3581 ,, �wk 5 . r [.,:,,,,,,V,':;,..)-1J7';''''',.;'4-7'' t .• n �, y } t � +��+ ,::''''.'.1',....4":'!'..,:.--..,,ii;.", t r t Y. Vt 4"l �, r i 4,i -.,-,v,-,-;, a�1i, ,4 -ai "�c y,�+ a 4. ' ,< (c) Main: stem Tualati.a' River above Gaston (z9 eer mile` 65) and; all butaries to the Tualatin River 'Tteatme�tt resu .tiag in month :y "average effluent concentrations nest`'�to,exceed S mg/i. of BOD and 5 mg/1 'of 5$ .or .equivalent cocitrol . (d) Tualatin River Subbasin; Ttte. dissol red:oxygen'Plevel in the discharged effluents shall not be 5ess than 6 gag/i :Y ' (e) Main stom; Columbia River: s ;, (A) During summer (May l to 'October 31): Treatment . ' resulting in monthly average .effluent 'concentrations not '`to exceed ;20 mg/l ,of BOD and 20 Mg/1" of SS or equivalent control. ~' (B) During winter (November 1 to Ap'ril,30): A mini:"mum ,of . secondary treatatent :or .equivalent control and unless otherwise` specificaily authorized by the Department,; operation of all waste treatment, and control facilities at maximuua practicable of icieucyopu effectiveness, do as .to .minimize waste discharges to public waters (if) Effluent SOD concentrations in ;z5/l, divided by the.;dilution. factor (rati) .(f receiving stream flow to ef£lnent ,.floa). :; shall not exceed one (1) unless 'otherwise specifically approve the Env#ro mental Quality Commission. (g) Sewage wastes shall'be d sinfected, after. , equ Lvalent to'thorough mixing with sufficient ch'loiriLne to provide lent to tual of at :least 1 part }per 0e0ifon.after;.60 minutes of contact time unless otherwise `specifics .ly authorized by permit. (h) Positive,protecti.on`shall be provided to. prevent bypassing raw or inadsquately'treasted sewage to public watcrs`uniess k otherwise approved,by.the Departmont.where eiimin�tion o, „ x t : inflow and".infiltration would be inecessairy buti not press tly practicable. • (i) More stringent waste treatment and,control requ�iremanta may be imposed where special condLtions ray requiire r ;, (2) Industrial wastes: f tht �' �a (a). After maximum eprect cablo implant ,control, a miaituum'o£ ; a ' . , ' ' 02 U) secondary treatment or .aquiva1.ent"control (reduction Hof " , ; : to c L ,fi rot" p suspended solids and organic. material wb erex present',S.n u,;,, x'R i t' significant giantities. effective disinfection; ,,he;rec } c bacterial organisms';of public heap t signi£ica ce axe _ • ,�` ;,4 ° present,:Viand. control of toxic-;or other. deleterious :,Y - :;' � substances), ` ' t ,-.4 .."....,,,,,?......,. ..,,, , ..,,,,-.',,,,-::;... n Yt i IJ � f I a . li yyn r. R L F i. r}Yh4 ::,it 't '311 M c4 piS s tiro �j k `;rFy ��� +�,sr z ��. Y K• 'J 1. n z 1 Px t 340-41-455 2 4t , r r Y { jc 4 � H k J �i ks PM\WH3581 _ , J s '� [ { t �9�b5r n iG 6�Y"an`�� 4,� w"� `F� 4 xSS a t T { ' S '-,' yg cSr 7 a rx - ', 4, .' Z }`" ,iu`4 '4' �,. 3A. '71Yr,,tE';', 4"T r � �i. � w�M1' , ' . * ,":40 ." 161 r , •} (b) Specific' industrial waste treatment""requirements ;ihall" be • determined on-an" individual basis'in accordance with the" provisions of''this plan, applicable fedetal..requii•ements, and the 'followingo (A) the uses which are or may "likely be made of the_ receiving stream; (B) The size and nature of flow of the receiving stream; (C) The quantity and quality of wastes to ,be treated; and (D) The presence oc absence of other souxces; of pollution" on the same watershed. (c) Where industrial, commercial, or agricultural effluents contain significant•quantities of potentially toxic elements, treatment requirements .shall"be determined utilizing .appropriate bioassays• (d) Industrial cooling waters containing significant heat loads shall be subjected to offstream cooling or heat "recovery prior to discharge to public waters. (e) Positive protection shall.be Provided to prevent bypassing, , of raw or inadequately treated 'industrial wastes to any public waters. . • (f) Facilities shall be provided to prevent:and contain spills of p�otentially toxic or hazardous materials and a positive program am.: for contaitumant and cleanup of such spills, should • they occur shall be developed. and maintained.. • ill 'N et'i et' a •o..".0 .oi. -+_ ®, i _:t + tin giver sub basic a d ids d.a t •a awe , - .:v t Janul. 199 The £ollowine sulasectioas shall au 'moo env�rneua' and development within; t a u latin ivex a�itdd O, we$a Fake s b basins e�eceat those develoxa is with;< sn1" ca n dam • p Lor to. Jr�nua�. + 1t, - • •{: a lie 'tie a- date san whi_c1n o e .. deva .o•r,e t .era. is received ,ov the local iur :sd ,�t on ;n "accortics"with thy' re aims of the ° sd, ion �' a v.. O a .d deve r e-{ t• .' r .{`: g . e t, t ' t s i. O •Lib„c w0,; . 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'RM\yli3581 " ' -' -,-,-.L'. ."-- .,"- ,'-- .,'"..--,- .--.}.-0::-%,',- :-,,.,..'1- i,::,;-,---,. ','"-,"..,";‘,1,75,.''''.'.'''''., -,"';,,L,i'''''J,''I',:i1",;,',,,,`,l'''.;,.'Ai‘'+.1.7_tf,,';'.“4',44'•- -.• ' , . ' • ',--,•--.'" ' •••:.' .-',.,-',''.:.''''',..,::',--,:'•,-;'-':','----,;: •''''''Ve..,;"-,,'`,.,1'..-",4'', .,-,'''''"'s'2..e,",-4..'1,',;.., ',-,-...,'\`..--'--i4+',:',„„,,c,P,++' i,P+'''. . ..'''' .:. ' ' ' '' ' ' ''-''' '''^ 1,- '' ' "'''''+.'r1/.! '7. '-''''',.',..f,,,.,■''',1,■.''J.(,`,7t,k,kk,,'4'..,li' t''';',','-;,L, c4''';','q''',.,,,,':L';',.',,''',,''..p-4'11;.--.s.,01, ,r,', '',-.., ,-- ; . v ,y,' « Y i. � ox {t s v T nos ° h �L > r t 6iiYrfk 7 r{ �.���` fin,... s `., r ... r � r r� '6 ' S" ',•-.. ; r APPEI DIX I , A .FA {t 1;-,'',' . a �3 a, CONTENTS Table 1 Universal Sail ", ,.'E tion TaLae 2 "R" Values,.Washisigton Col-Intl . .. Table 3 MydroLogic Soil 'Croup{ o+�'the.Soils Table 4; IS Values Table 5 " Va S Mulch'Fabtors ,�,` Table 6 "C" Values Figure l: Interceptor Swale Figure 2 Temporary Interceptor Dikes 'i' Level Spreader Figure 4 $edi. ent Trap • ar Figure 5 Pipe Slope Dais d." • Figure 6 Stabilized CoastruCtion.'Entranee �: B".! Ii , • • , J•{ ' x _',1:.'''-',' tr s 5 t $ „,;‘,.',',',.,,,I! + l WC5169. '''.‘,.'''',•k:','','''-.' ''..;..:, r t. , Cl x•, 3"1 -.0 x ,i ry 4 a s1 P,s,” ' � v E .. �? x '. � x���'"F y r ti t �,„ S :7 " 4# t 1 vim'\,._ 'q I yn Sct {rS x•• ': .�i'' 2.. tir'' ,�,'T^4Y r'r� �i rK 4� ,y.1'4'4w' rui k ',!tit�',h ,,, .). s ' i' , ' , . 0 : t ,Jt •;-'',-*"„...-,-;''• ,,.a, '1',.,.':',..)c,.,- , 'f Aet.�, i UNIVEISAL SCU. LOSS EOUA TtON } i/ r cured iS efts volume 0 rr, , -1-1, the -•sm st.ra- v !um The sediment storS a v�alurr►s e4 � trite and ciao be required to captain -tit 51. !s sfimerit yield to bane United`Scat tpa�trrte�+t of A9 c lure. Universal Scat Lass equation (LISLE) developed fay. Wk ere A s annual sediment field la tens per acrei' p rdir 3i.erOsiisn,dndez . it z �iadibaity faaP. rn'Table 3 nr"as deterrausied by'f•S----,-nd t ia's9 by a g o sail 9Oert en9sese : + �. tanr h-ape far t;front Table 'r'6 vietets: . - Ca from a plan view). , measured hc��s.r�aestare t. CV a cover r. use 9.Q arftic i repro:tents Rte 9rouStd C:aver cover the �n P TA aml,e , et€trihn c C rpm tam:use 0-9.rnfis a regar/CS S Q� n dap (3� rt-marks s to contours) a Annual sediment yield c lculatr�. sfe t a, C.�mputra the R vain by Obt in nag the R value 2-y / hour tsopluviat map in TA�86E 2. b, Otvide the see into areas Ttatttag us`S - i type and of-unify.slope and dengtt� C. Noce tats YBISJe fran�o t to S�ad its chart(T e B 9t1r each Sack tripe. q- Uete mine the L5 value for. uniform area(S a Table 4 e. GetetTo a the annual sedirne t yield (A) firs tares per acre far ea as®maajene J ifoasx area by rr9taltl�yirf9 R tunes the•K and LU value.forcer area. • i.: d (A) far each area by the acreage to be exposed (only I f�Iua-, the annaaaf SediSt�ertt y { D that area to be cleared) of each asea.' Sum the r�tblts;to eampute�ate.t®eai atsrtuat ,,, sediment toad (in cared) to the trap;(L). is them determined by dividing.tats total i sedimear►t load The sedirstenr storage volume(y.) ,� use�,( tar: erfcuba6 facet. a far.the sediment deposit (ire tens)men gy an average dea ctf ta LA/Pavia' j 1 S j ' 1. 4 .t t f 4 it ..fa .4F 4 5 .ry i® I � .. g . _ . . 1 A?IQW 1 • , — ' ( c. , ' `a— ', E b e. v , I I 6 TV w f p s •, dam. AP k. . '* Pk '' —).. -N a' t :Z e � • r. -40 -• ct. 1 `. ` t 5.1, ,fit,,i .. -i • fir: ,. Ij 1�• , a •. i 1 � Y �.+ � A. A ,4/ 1 i✓3°r. ,� ../dam f � j.r • �°' ••,� p. t' uh1�r' � •�tAmeEo.rt. •'-'4-1.' \ Y'.� '.• ..J�.� � r - _ fV I- 40 �I I i' f t' `►9 V A _ M M 1 L l I, �� +� Ash' �� f �-_.. IfASI•lltGTON COUNTY I t x= 1 a a t a s aiss r f .��!!�"''' s' _ + T,U,L 3 HYDROLOGIC SOIL GROUP OFTHESOILS Y1r��iiltdGTON COUNTY t a. So11 Soil Hydro- Erod- ° Hydro- "Erod- Piap logic ibi1ity Map logic liailit Soil Group Symoo i Group Factor, "K" son 1 Group Symbol Groin. Factor, "'r"' -. 0.43 HUUEKLY 22 U` 0.37 a ALOHA 1 C : �i�tl TY 2 • C 0.32 JURY 23 C 0.2 • : ASTORIA 3 B U.24 KILCHIS 24 C 0.15 t ,..: 0.28 KLICKITAT 24G B 0.1 f •,,.•.,, URIEUUELL 4 8 a•.:r .: 8R IEDWELL, 5 B 0.17 Kt4APPA 26 8 0.37 . 0.32 LAB 27 U 0.2 ; CARLTON 6 3 ` CASCADE 7 C 0.37 ' LAURELWOUO 'Ld B 0.43 CHEHALEM 8 C 0.37 MCBEE .. B 0.28 CHEHALIS 9 8 0.24 MELBOURN 31 B 0.24 • CHEHALIS 1 u t; 0.37 isIELBY 32 C 0.32 CORNELIUS 11 C U.37 uLY IC 34 b L1.32�` KINTON 11B C 0.43 PERVINA . 36 C 0.24 CORNELIUS QUATAAUA 37 C 0.37 VARIAt4T 12 C 0.37 SAUII 38 C 0.32 - COVE 13 U 0.28 TOLKE 38 • B 0.28 COVE 14 U 0.17 UUIFLUVENTS 40 3 0.28 psYT0N 15• U i .43 VER(SOORT 42 U • ( r' .E�HA • 16 U 0.43 WAPATO 43 • ' U 0.32 , GO8LE 17 C •0.37 'elILLAP1ETTE • 44 8 0.32 GOSLE 13' C 0.37 W0100BUIN 46 . C. 0.32 HELVETIA 19 C 0.37. XEROCHREPTS 46 13 0.43 HEMBRE 20 8 0.32 HAPLOXEROLLS 46t- C 0.32 HILLSBOitU 21 B 0.49 XERUCHREPTS ' ' 47 0 0.02 ,': :. :: RUCK OUTCROP 470 NA 0.02 • HYOROLOGIC SOIL GROUP CLASSIFICATIONS irdatration rates. evet%wiiert tttoroughty watteo.and cortstsuttg A. (Lout runolt eptrdnitat). Sods Raving hirlh ravats. These soils have a nigh rate or water _ U) chitty of deep.waIl-t crssivaty drained s or 9 Scats Raving moderate irtldtratton rates whet't ttt®tougnty welled. and g, (RAOdttedy low ratrti7tf P1• Trieste have a macerate,rata of • �ngstiRg eteaaay c6 neoderatally tine t®m�erattlty curse t�atues. ♦ water tr�rtsmisstc:rt• '1 0 1' .,& G. (Moderately high rureott potertttal. Snits having stew intiluahOn rases when trtoraugtdy+ ,,,,wen. canstsung chiefly of soils watt a layer that Impedes davrrtware. rrsoverra t aS water,or sods wttl�ctt erat��i ltsta�to Itrse textures. These soils weave a slow rate of water ; wcTttdO atKt CortS%Stt�3 0 (high rtratotf potenttatg. Soils 7tavtng very stow treldYratttut rates when eriorougrdy ' with i, (Highy tat day Soda with a high swedtng potential. sods with a permanent nigh water table. sots th a hardpan or dab layer at or near trio stirlace.and shallow sods over Heady impe3NWl:1S material. These ands , 1 r , htave a very stow rate of water transmission f.: , ; -� From SCS ` 7r ' U1t 'd:•' SG. ' TAB1.B LS VALUtES 70&:"It" Z0[1 2,- '�D5Z.G011 MLRA's Al, A2, d3,, AS, 86 024, 025, and E43 For"((-•&° 97. co flan s bm 65.41 sin2(tan'ls) + 4.56 stan(tan'ls) + 0.0651 LS '((-=�*1 cosftan' s? j 72.6, s `For slopes steeper than 97 LS n (( ) cos(tan'is)]O.SOLolsin(can"ls)11.4 •, s ,n 5,143 GThere s g,'= length in fees. along slope s slope in 7/'100 Fors < 0.01., ta00.20 i' ' 0.01 < s < 0.035,.maO.3 0.035 < s 6 0.045, aj®0.4 s a 0.045. m�0.5 Percent Slope 25 50 75 100 . 125 150 200 250 300 350. 400 -450 500`' 0.1. 0.06 0:065 0.07 0.07 0.08 0.085 0.09 0.09. 0.095' 0.10 0.10 :. 0.10 ? 0 , _ 0.2 ' 0:06 0.07 0.075' 0.08` 0.065 0.09 0.095 0.10 0:10 0.10 0.105 '0.11 0 :• 0.5, 0.07 0.08 0.09 0.10 0.10 0.10 0.1E 0.11, 0.12 0,12, ..0;13 0.13 CI.: 1.0 0.09 0.10 0.12 0.13 0.14 0.15` 0.16 0.17:, 0.18 0.19`. . ,0.20 0.20' 0 .:; 2.0 0.13 0.16 0.18 0.20 0.21 0.23 .0.25 0.26 0.28 0.29 0..30 0.32 0.2 3,0 0.19 0.23 0.26 0.28 0.31 0.32 0.35 0".38 0.40 0.42 .0.43 0.45 0.4^ 4.0 0.23 0.30 0.36, 0.40 0.44 0.47 0.53 0.58 0.62 0.65 • 0.70 0.73• 0.7', 5.0 0.27 0.38 0.46 0.53 0.60 0.65 0.76 0.85 0.93 1.00 ` 1.07 1.13 1.2; 6.0 0.34 0.47 0.58 0.67' 0.75 0.82 0.95 1.06 1.16 x.26 1.34 1,42` 1.5 7.0 0.41 0.58 0.71 0.82 0.92 1.01 1.16 1.30 1,43 1.54 1.65 1.`75 1.8' • 8.0 0.47 0.70 0.86 0.99 1.1E 1.21 1.40 1.56 1.71 1.85 . 1.98 2;10 2 2 1.:7_.•__1...31 1.43 ._.1.66_....._1.85: ..:,.2v03•w_.-:2.1.9 ._•.;2.34...^ 2 48; ?•6_•. 9:0 ..., -059--., 0.83 1.01. '• 10.0 0.68 0.96 1.17 1.35 1.51 1.66 1.92 2.14, 2.35. 2.53 2.7E 2.87 3.0:. • 12.0 0.87 1.23 1.5E 1.74 1.95 2.13 2.46 2.75' 3,02 3.26 " 3.48 1 3 69. 3.8 14.0 1.08 1.52 1.86 2.15 2.40 2.63 3.04 3.40 3.73 4.02 P 4.,30 456` 46 16.0 1.29 1.82 2.23 2.58 2.88 3.16 3.65 4. ' 5.7 „ . • 18.0 1.51 . 2.14 2.62 3.02 • 3.38 3.70 4,27 4.78: 5.23 5;.65= I 6.04 6.41 6 f 20.0' 1.74 2.46 3.01 . 3.48 3.89 4.26 4.92 5.50 6.02 6.5E. -696' ,,.7.38 -7. 22.0 1.97 2.79 3.42 3.94 4.41 4.83 5.58 6.24 6.83 i 7.38 7.89 8.37' 8..`• 24.0 2.21 3.12 3.83 4.42 4.94 5.41 6.25 6.99 7.63 1 8..26 8.84 9.37 9,. 26.0 2.45 3.46 4.24 4.90 5.48 6.00 6.93 7.74 8.48 1 9.16. 9 80.. 10.40 11 t 28.0 2.69 3.81 4.66 5.38 6.02 6.59 7.61 8.31' 9.32 I10.10 10.80' 11.40 12.1, n^ 30.0 2.93 4.15 5.08 5.87 6.56 7.19' 8.30 : 9.28 10.20 1 J 11.00 . 11.70 12.40 13. r-m•� • 9. 32.0 3.18 4.49 5.50 6.35 7. 7 10 . .78 8.99 10.00: ,, 11.00 11.90 12.70 13.50 14 -f 1= 34.0 • 3.42 4.84 5.92 6.84 . 7.65 .'.8.38 9.67 10.80 11:,00 12 80 13:70 14.50 15, 36.0 3.66 5.18 6.34 7.32 8,18 8.97 ;10.40 •.11.60 1 12.70 . 13,70 14.60 15.50 16 t` 38.0 3.90 5.52 6.75 7.80 8.72 9.55 11.00 12.30 13.50 •14 60 "15.60,! 16.50 17 ;. - 0 40.0 4.14 5.85 7.16 8.27 9.25 • 10.10 11.70 13.10 1 14..30' 15.50 16.50 '17.50 18 5. 0 trig • '1 ! 45.0 4.71 6.67 8.17 9.43` 10.50 11.50• 13.30 ;14.90. 16.30 17.60 ;18 90 20.00 21.,:, - ,'{ 50.0 5.27 7.45 9.1.2 10.50 11.80 12.90 14•.90 I 16.70 • 18.20 19.70 ".''21 10 - 22.30 23.^" 55.0 5.79 8.18 10.00 11.60 12.90 14.20 _16.40 ` 18.30 20.00 21.70 23 10 24.'60 25 J 60.0 6.27 8.87 10.90 12.50 14:00 15.40 17..70 1 19.80 21.70 23.50 X25 10 26 60 28. [ { • Vertical lines indicate normal limits, of simple slopes. , I s . { ' [ i J , ; .,,t. 1429 Z �4ti ��);^ h - Mrs• r�e ' � J Revised,February 1986 . : ` sLOPiS L.4iFt7T8 III FENT • 500 550 600 700 800 1000 1200 1300 1400 1600 1800 2000 2200 2400 2600 0.10 0.105 0.11 3.11 0.115 0.12 0.12 0.125 0.13 0.14 0.145 0.145 0.15 0.15 ' 0.155 3.11 0.11 0.115 0.12 0.125 0.13 0.13 0.13 �..L1 0.13 0,13 0.14 0.14 0.14 0.15 0,16 (2,11.3...1-- .16 j 0.16 0.17 0.17 ' 0.175 0.18 0.18 •00.185' 5.21 0.22 0.22 0.23 0.24 0...6 0.27 0.28 0.28 0.30 0.31 0.32 0.33 0.33 0.34 3.33 0.33 0.34 ((�� q. 0. 7 0.40 0.42 0.40 0.44 0.46 0.48 0.49 0.51. 0.52 0.73 ��Yr..v ��J mss.�.• •` 0,46 , 0.48 0.49 1• 0.51 0.54 0.57 0.60 0.62 0..633 0.66 0.68 0.70 Y. 0.76 0.79 0.82 0.97 0.92 T.00 1.08 1.12 1.13 1.21 1.27 1.32 1.38 1.42 1.47 1.2.E 1.25 j 1.31 1.41 1.51 t.69 1.85 1.93 2.00 2.14 2.27 2.39 2•51 2.62. • 2.73 }' 1.5; 1 1.57 1.65 1.78 1.90 2.:2 2.33 2.42 `2.51 2.69. 2.85 3:00 3.15 3.29 c 3.42 1.84 1.93 2.02 2.18 2.33 2.60 2.65 2.97 3.08 3.29 3.49 33.68 . 3.86 4.03 4.20 2.21„J 2.32 2.42 2.62 2.80 3.13 3.43 3.57 3.70 3.96 4.20 4.43 4.64 4.85 5.05' ' 2.62 • •2.73 •_ 2.87-.._._3.10 _3.31. 3.70 4.06 4.22 4.38 4.68 4.97 5.23 5.49 5.73 5.97 f 3.03 3.18_ 3.32 z 58 3.83 4:28 4.69' 4.89 5.07 5.42 5.75 6;06• 6.36 -6:64-_ 6.9.1, 3.89 4.08 4.27 4.61 4.93 5.51 6.03 6.28 6.52 6.97 7.39 7.79 8.17 8.53 8.88 4 +•81 5.04 5.27 5.69 6.08 6 80 7.45 7.75 8.05 8.60 9.12 9.62 10.09 10.54 10.57 .77 6.05 6.32 6.82 7.29 8.15 8.93 9.30 9.65 10.31 10.94 ''11.53 12.09 12•63 13•15 6.76 7.09 7.40 7.99 8.55 , -.6.56 10.50 10.89 11.31 12.09 12•82 13.51 14.17 14.80 15.41 7.78 8.16 8.52 9.20 9.84 t1.00 12.00 12.54 13.01 13.91 34.75 15.'55 16.31 17.04 17.73 8.82 9.25 9.66 10.40 11.20 :2.50 13.70 14.22 14.76 15.77 16.73• 17.64 18.50 19.32 20.11 9.38 10.40 10.80 11.70 12.50 14.00 15.30 15.93 16.53 17.67 18.74, 19.96 20.72 21.64 22.53 • 11.00 11.50 12.00 13.00 13.90 15.50 17.00 ' .7.66 18.33 19.59 20.76 21.90 22.97 23.99 24.97 12.00 12.600 13.20 14.20 15.20 17.00 18.60 19.x+0 20.14 21.53 22.83 24.07 25.24 76.36 27.44 ®" .3.10 13.80 14.40 15.50 16.60 18.60 20.30 21.15 21.95 23.47 24.89 , 26.24 27.52 28.74 . 29.92 � 20.10 22.00 22.90 23.77 25.41 26.96 28.41 6.20 14.90 15.60 16.80 18.00 5.30 16.00 16.80 18.10, 19.30 21.60 23.70 24:66 25.59' 27.35 29.01 30.58 .6.40 17.20 17.90 19.40 20.10 23,20 25.40 26.40 27.39 29.28 31.06 32.74 - ' .7.40 18.30 19.10 20.60 22.10 24.70 27.00• 28.12 29:80 31.20 33.09 34.86 ' 18.50 19.40 20.30 21.90 23.40 26.20 28.70 '29.83 30.95 33:09 35.10 37.00 29.80 32.70 33.99 35.28 37.71 21.10 22.10 23.10 24.90 26.70 33.30 36.50 37.97 39.41 42.13- 23.60 24.70 25.80 27.90 32.70 36.60 48.10 41:73 43.31 46.30 25.90 27.10 28.40 30.60 3550.60 32.70 39.70 43.50 45.24 46.95 `' 50.19 :8.10 29.40 30.70 33.20 35.50 • LS values right of the vertical lines dill normally be used in calculating complex slopes. ' 15 ri it tAS r• ;• 1 rS 9Y �� :�✓ a ,m *k.:yl ,I c,: c ; .L . ..r.;,:. ,+5 Yt4*� m; TASLE Sr C° VfWE+., iUL.CH FACTORS', . Tyne ; AAulch Lana Factor Length mu lch Rate Slnoe C< li it= _ - Pans pgr acre ?ercent Feaat 'Jane 0 all 1.0': Straw' or hay. 1.0 1•S 0 20 200 tied down by 1.0 6.10 .20 100' anchaeing and tacking 1.5 1-5- 12 '300 + equipment 1_5 6.10 .12 150. . Do 2.0 1.5 .06 400 $ 2.0 6-10. 06 200• ,. 2.0 11.15 .07 150, �, 2.0 16.20 .11 100 2.0 21'-23 .1 d 75 �" 2.0 26.33• .17 50 � sl 2.0 3.t-SO .20 .3S Crusho-d `stone, 135 x:16 :05 200 ?4 to 1'z i • 135 16.20. .05 150 . .,. 135 21-33 .05 -1.00 f 135: 34-50 .05 75 c •y ', 00. 240 21 02 300 240 X 21-33 .02 200 f' 240 34.30 .02 150 ., - - -- - 'Wood chips - - -- 7 .08 -75 '-'r,-....' --'`'. -- ,, ,, . , i ..., 7 16-20 ,08 50 . + ®o- 12 <16 .05 150 12 16.20 .05 100• 12 21-33 .0s 5 ~� Do. 25 <16 16 :02 • 200 25 16.20' :02 150 . .. 25 21.33 .02 100. , 25 34-50 .02' 75• From Meyer and Ports (231. Developed by an interagency work- ''. it ' shop graaap an the basis of Held experience .and limited research ,- data. '` -I t Mazienuea slope le>,�9t, for ,.a'• the s eoiried .'"alcet r®te c- l`„ nt . -« U) date: cre•d effective. When' This I.rtiat cs exceeded etcher a"`higher F �,` application role or mechanical shortening or the effective "slope length is reeJw ed. ' When the straw or hay mulch` it nor anchored to the Lo l +C t i;d values an moderate• or,sfeep.s°oyes;bf 'soils, having K;values greater •: .; than 0.30 should oe taken at double tkr balues given in this:took f , 1 ,, ' 2. J 3 � A P� z t 17 ::::e:‘,."-Y,..'.,, tr :!^..w `•'.''',, •'',/,: .,;`,•5 �k S:• _ f it ky lS 7N.f - a . r1 ,r • • . • C a� F AC ®CTION ®� C R ' 11111111/111111W MS . ' CO i TRU SITES • ` 1111111111111111 - .• 1111111111111111 1111111 g 05 kvit . Iiiiii.1111,111•111.1111111111nnum111111111.■ ge s,v1.-......•=1111111111 im''''''' - • 1 { mmilil t� • . . ,. .. e i . ` -',,' ,- - • 6 ums...11.....IMMallimiliFIW leill .-:,,/,',".^"..'" ..' F . 55 immi . 014,111.11.1110111 .11111=1111 In : - , R 36 , alia 6 • 1 ' imink•Nt 11111111111•10.11111111111111111 " , ,,,i soILS.:-,. .--- i ,!'.':-: - , 26 M. ' 4. .01116'''' Millimm a rt �T y c • k '- .:r ..::�.. •.' i°'S°° ..�" ..' .•• .,�. --ss - UND �Y.��i ED. SQI�� �i nil eea •. ®�iA ' C . 49 co VEGETATION AND RESIDUE COVER ' Yty Y ' .- .<"YUTC'l.'f6l it f v 'ar--"�P'M"v •.. }�. ••�, yea Ya .1 • t a a _ :;',.".3'i,:',... A r'1GU 1 INTE1 CE17TOR . 1 It mtit. 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''' : ' ' ';' : ' - ' ''- '• : '7-,,:',.,',..','Y,''.=:$;,...,:Y.-,..,-.,---.f.,,..--.,•,-,.„.,,,-.,...,.,;',,,..:--,,,,•;',-..,',:°•,,,e.,,-,.•.'...,..- . . . , .,s,,....7;,,. ,.. „,..,,, ,. .. . ,, ..•.. . ... r :: .: :..... _�:� •,fir-,� tv •E • �Yr e .• fir' ' :�': �• .. ... `' a 911�z r ,2., :. • �1 . N. SPAiESA: • • Os CO • FYI L' �C•I. !'!`• L ,� ��',.• • ■ Y tiT7 • • l ‘ ' O: Tigard Plingii scion FROM:' Deboradl Stuart, Ass s3tantPlanne `' ' : Zone Ordinance Amendment ;ZOA 89-03 DATE: October'b 1989 In ''late duly, the state Environmental: Quality Comnieaion, adopted new, regulations pertaining to non'-point source pollution caused; by new develo nt. The~new regulations apply to construction ;pro jet s in the Tualatin Riyver_ sin for which au application is submitted after uasy 3, 1990. The City is s requir€�d to ,adopt these regulations. Then planning on October will'. consider` `` these .amendments (1°21 89-03) at their .regular !neeting on October17, 1389. I The tQC s also considering potential. `rules which would put additional requirements on new devel®pzeents; including a 'requirement for, permanent.. storm water treatment for,dome ulevelo ants. Thecae rules will likely be considered November by the -EQC end may later be adopted 'by the City. Attached are the proposed changes ('Exhibit A and S";' to Coatmunity Development Code Chapter 18.90, nvi rox mefltal Performance Standards, and to Chapter 18.26, Definitions, and the rules as found in 01R 340-41•��55(3). New proposed wording is indicated by IAnderlines. No wording is propo®ed to be :deleted free this L chapter. Attachment Ili4 0 ILI . "EXHIBIT A" Chanter"18.90 ENVIRONMENTAL PERFORMANCE STANDARDS ; Sectiono: 18.90.010 Purpose . ' 18.90.020 General Provisions 18.90.030 Noise 18.90.040 Visible Emissions 18.90.050 vibration 18.90.060 Odors ,. 18.90.070 Glare and Heat 18090.080 Insects and Rodents 28.90.010 Pur xeae e A• The purpose of this chapter is to apply the federal and state environmental laws, rules, and regulations to development within the City of Tigard. (Ord. 89-06; Ord. 83-52) 18.90.020 General Provisions A. In addition to the regulations adopted in this crpter, each use, activity, or operation within the City of Tigard shall comply with the applicable state and federal standards pertaining to noise, odor, and discharge of matter into the atmosphere, ground, sewer system, or stream. 1. Requu3:ationa adopted by the State Environmental oaaalita� Coxm ission pertaining to non-point source •.11ution control and contained in the Oregon Administrative Rules shall b,y_reference be made a •art of this chapter. B. Prior to issuance of a building permit, the Director may require submission of evidence demonstrating compliance with state, federal, and local environmental regulations and receipt of necessary permits. Air Contaminant Discharge Permits (ACDP) or Indirect Source Construction Permits (ISCP). C. Compliance with state, federal, and local environmental regulations is the continuing obligation of the property owner and operator. (Ord. AD 89-06; Ord. 84-24; Ord. 83-52) CD 18.90.030 Noise A. The following additional restrictions are incorporated with the State Department of Environmental Quality (DEQ) standards for purposes of City noise regulation: _ j 01.1212.1124211111111511F- 1. For purposes of measuring permitted sound levels from noise - generating sources under the provisions of DEQ rules any point. l• where a noise sensitive building could be constructed under the provisions of this title shall apply as if such point contained at a, noise sensitive building; ; ; 2. Within the industrial park (I-P) zoning district, each property or building under separate ownership from a noise generating source shall be considered a noise sensitive, property under the provision of DEQ rules with the exception that the allowable noise levels may be increased by five db; and 3. The construction including excavation, demolition, alteration. or repair of any building, -except where a special permit has been issued by the Director under the provisions of section. 18.90.020, other than between the hours of 7:00 a.m. and 9:00 per, . which involves any loud, disturbing, or unnecessary. g ary noise in the city, shall be deemed disorderly conduct and therefore unlawful. (Ord. 89-06; Ord. 83-52) 18.90.040 Visible Emissions '' A. Within the commercial zoning districts and the industrial park zoning ':: district, there shall be no use, operation, or activity which results in a stack or other point source emission, other than an emission from space heating, or the emission of pure uncombined water (steam) which {' is visible from a property line. Department of Environmental Quality rules for visible emissions (340-21-015 and 340-28-070) 'apply. (Ord. , 89-06; Ord. 84-24; Ord. 83-52) 18.90.050 Vibration . -- A. No vibration other than that caused by highway vehicles, trains, and aircraft is permitted in any given zoning district which is discernible without instruments at the property line of the use concerned. (Ord. 89-06; Ord. 83-52) 18.90.060 Odors l: . A. The emission of odorous gases or other matter in such quantities as to a. be readily detectable at any point beyond the property line of the use OC ss creating the odors is prohibited. DEQ rules for odors (340-028-090) 0) apply. (Ord. 89-06; Ord. 84-24; Ord. 83-52) .-" !i 18.90.070 Glare and Heat A. No direct or sky-reflected glare, whether from floodlights or from high ..! temperature processes such as combustion or welding or otherwise,`which is visible at the lot line shall be permitted, and: 1. There shall be no emission or transmission of heat or heated air which is discernible at the lot line of the source; and •5' 2 These regulations shall not apply to signs or floodlights in . parking areas or'construction equipment at` the time,.of construction or secavation work otherwise-permitted by`this title. (Ord. X39-06; Ord. 83-5 p as-98.080 Xnseata and Rodents 'Al ',�ma• .,, • as including wastes shall be '`stored ,. all grounds shall be All,n1ained in • per which will not attract or aid the pxopagation of,• fnaocts.:or resdents or create a health hazarrd. (Ord. $9-06; .Ord. 83-82)• t4 iad �.i t ,1: Yi cp/ZOA89 _03 a::• t H.\L I '0$BOR I t t t .r t 1t1.• k l''''i e :) i tl ir s ,,. s t1 ¢t 1 '''''''''''''''-'1':„ yti'+ � _ 4 •vyy.r ' 3: i rr 5.t+.'#'a+ P�` r. ar ? 1 1 d t r Y Y ' I�,rt ti l: nZBIT B"n The .:following definitions shall. be' added . to Chapter ' 1.8.26, Definit .ons, acco,ding'`to alphabetical order. ' The =a boil din or mining operati®n,. making a ' +teriul change I n the•use or appearance of �a, :structure or land,,. dividing land in two or more• . parcels, including� partitions : and subdivisions; as provided in Ore on Revised`• Statutes.,. 92. it en used .in ref©rence to erosion iori coriicxol cs� �nae ero�si n cones of^t' _la', this 'terms' also includes those activities def fined i this (11/1. er under "L id ffor a7lteiration"."!rosion Control Plan" -- shall a •lan_contai I. a ii off' best .itat•-assent; ?; •radices to be a 1�l3 ed dorm :construction to co trot. and' limit aoi: era�sioaI . , .. .vac and t v "Jurisdiction - refers to an -cit o count a•e in t e . a at, ®sash sake subbas es sreaulatea ,land d®�relou spit "activities wi fain its a b©ur3dariss by: a zovin Mats, situ t►lans .''.or, iesuine perm $ for land devedevelopiient. Works Pro lect� - means anr► land slevelu ant :conc��scted or fin ccd 1w. a' .. - .ocal. state o festeral governmental. bodes L , s i 1 I W 1. a'' ti '' d1. �•r. r "4k- { n' x t tf y n ` p a Cn f; ' q k v It; z• �' n;r, 9-z i kr ---------- • Attachment x l PROPOSED Rtux.is ' 340-41-006(18) "Land Development' refers to any human induced change to ,,. . improved or mp unimproved, real estate, including but not limited to construction, installation or expansion of a building or other structure, land division, drilling, and site alteration such as that due to land " , surface mining, dredging, grading, construction of earthen berms, paving, , improvements for use as parking or storage, excavation or cleering. ,:. (19) "Jurisdiction" refers to any city or county agency in the Tualatin - River and Oswego Lake subbasins that regulates land development activities within its boundaries by approving Plats, site plans' or issuing permits for land development . '(20).. "Erosion Control Plan" shall be a.plan containing a list of best management practices to be applied.during, constcuction to control and limit soil erosion. t (21) "Public works ,Project" means any'land development conducted or financed by a local, state, or federal governmental body, 340-41-455(3) son-point source pollution control in the Tualatin River sub-basin and lands draining to Oswego Lake to be -provided after"). r ) Jail t-' i i qo - (a) The following subsections shall apply to any new land' development within ,the Tualatin River and Oswego Lake sub-basins, except those developments with application dates prior to January1, 1990. The application date shall be the date on which a complete application for development approval is received by the local jurisdiction in accordance with the regulations of the local jurisdiction. (b) For'land development, no preliminary plat, site Plan, Permit or , public works project shall be approved by any jurisdiction in these sub-- basins unless the conditions of the plat permit or plan approval includes an erosion control plan containing methods and/or interim facilities to be 1 ' y•' constructed or used concurrently with land development and to be operated during construction to control the discharge of sediment in the stormwater runoff. The erosion control plan shall utilize: OD (A) Protection techniques to control soil erosion and sediment transport to less than one (1) ton p per acre per year,.. as calculated using the Soil Conservation Service Universal Soil Loss Equation or OM , other equivalent methods. See Figures 1 to 6 in APPENDIX Y for Qi . examples. The erosion control plan shall include temporary sedimentation basins when, because of steep slopes or other site . specific considerations, other on-site sediment control methods will not likely keep the sediment transport to less than one (1) ton per acre per year The local jurisdictions may establish additional j requirements for meeting an equivalent degree of control.' Any sediment WC5169 A-i • ,r r � is t• q t ' "asins`'constructed shall be sized',using, 1 5 feet minimum sediment.• b, lus 2.0`feet storage-depth above for a settlement zone �.torage depth p , �. The'storage•capacity of the basin shall ,be ,sd, - 0/toast®.e all of e \ sediment •.drat is likely to °he,"transported and,,collected"during construction awhile the:;erosion potential exists:. W'hesm:l�he eYOSxoi daeitt potential has been 5r coved,:"the" sediment-basin, "or ot2aer se r ,tae control faci liLties;. can°be removed andt•;the site. restored as .P f xtrol''.te plan. ,All sediment bas sn hall ilure.o theec amesasc z owe flow• to prevent ero �.= �aergency . r . ..• dike,• :or (�)•• dewed""£ran and consistent " , A`soil giros osi coinerP- =patrix with the universal sail loss "equation'`approved by the. arise ictiots or i' the Department. , A fix, 1 as necessary withou�r approval Vic? The Di:lcector may modi� PPS from;the ct°r- stal Quality"'Coanaissiorl. Tile, Dir' people e tm 'apply, ' '(d) As local Juri:sdiotioss adopt a a en eroved wilg. llan, as yrequired"by 340.41-670(3)(g), apply"to development.Sin that jurisdictioa�. f NMI.. . • • J • I. • C5I69 F, 2 ' 4 J' y- r•YM 3 ., . .{+-ft '.17lNcf^�'�'} f 1v +'{+1 ter z':1 { �4d LN ?3 S {Ii' Gl �2 _ A - .,t _ art` y pp �r-**�TTT t► yy r • A PENDIX I • f ar v r ., r r CONTENTS • Table'1 Universal Soil Loss.Cquatiosn Table 2 nit" Values, Washington Co*m Table gydrolo is Soil Group of the Soils '' Table 4 I.5 Values x .9C" Values Mulch Factors Table 5 Table 6 "C" Values Figure_ Zuterceptar Swale - Temporarg Interceptor Dikes Figure ^� Figure, � Level Spreader Figure 4 Sediment Trap Pipe Slope Drains Figure 5 ' a Figure 6 Stabilized Construction Entrance • CO • x 3 i Z c '3i m r: y 4 1 w a ns L ' C5169 t` ' .s 74 E ir., At W -. . - , TABLE1 . UN IVERSAL SOIL LOSS EQUATION s___ r..Omot the sedimeetit store_a ume-.The"set sediment storage vo ume required is the volume o yield to the trap and can be estimated by using the '' required to ctuttarn flee central sediment the t t ed States Drpartmedt of Agri€:uttuee. Universal'Suif Moss Equation(USI.E)develOed by „ . Where A ,� annual sediment yi4*i in tons per.acre Y rainfall erosion index K s soli erodlbility factor,from Table 3 . Or a5 determined ' so scientist.or g _ I pct frosts Table. 4 (note.lengths a LS ofatef distance from a plan view) d nreaasp are ffi cover factor.use 1.0 which represents no ground cover C� oceSS TABLE 5 and E3 during Dubenstnun erosion control prate factor;use e 0.9 which represents PR and down slope- (Dozy cleat merits trao5cvvallan9 up parallel to contours) o Annual sediment yield calculation. s'4e y-stela prpceclure: Compute the R value by obtaining the R value from the 2'-year/6 -hour lsopluvial Map 4,. in TABLE 2 b.: Divide the site into areas of homogeneotas SCS.sou type aril.of uniform slope and, length. Note the K value from the sCS soils chart Gable 3 :r'for each soil type. i... d. Determine the LS value for each uniform area (See Table 4 )- • e. Compute the annual sediment yield (A) in tons per acre for each homogeneous/U1 iform �' multiplying R rimes the K and LS values fcr each area. � area by. the acreage ta be.exposed (only f Multiply the annual sediment yield (A) for each area by that area to be cleared) of each area Sum the results to compute the total annual sediment load (in tons) to the trap ( ,) o The sediment storage volume (V,) then determined by dividing the total'annual sediment load ` (in tons) (L„) by an average density fa the sediment deposited.use Oa)5 to per cub foot. V, - L,/Pr„K. } 1, � a r { ,. t t . i .ry, 4x ‘tt�Yt etrh '• + ' : w r ' t s { S 'n1, r ''. h a t] a'• ; r �10.0t Y STRIP , J I 7 i f ,� '11-R" FACTORS ' '. 9g$adran a marUh jr,r&flfall ,..;.• ! �, 5 , r intelnsitYrnaP .�►°o vfall not tr�ctc.ldc'dr lz y�• � o LOC�TYblt MAP- _I• ?,, •f•. . ` tit i P i - . p ,tom *^ ry � � ! .Q.,:°' 01,a•. l f O ` J t "'"..''''.-.1'' , /-..''7.-,--...]:,=:`;.'.;':::','-'''-',..,::i:--1-;=::-'. ,'"7............--...�i A•a Ls _•-ro a•` dje.P t' �if °3 '�''"' gip _ v s. �t w •n!i � _�iii: �_ dip �' 0 0 a , ,! A . 1 . ' '' / fli• r• • �.-7"---.-••••,,i-,. =" WP%SMH4GTO!4 COUNT Y- 4 P °p�'_ F I , I to { I �,ey ' � '.fit JAIAIfAtiT 1 73 ` i '.• 3 +r")s4•• • f .1 1 'I 1Y'{�: I k'. 8 �� r } ��'"yy�,, 'F 51 f I• t • 1 TABLE 3 HYDROLOGIC SOIL OROUB'OFT1HE SOILS WASHINGTON COUNTY Jir Soil Soil Hydro- Erod= Hydro- Erod- Clap logic ibility map logic ibility Soil Group Symbol group Factor, "K" Soil Group Symbol Group ' Factor, ";t" . ALOHA 1 C 0.43 HUBEItLY 22 U 0.37 AIiITY 2 C 0.32 JORY 23 C ; 0.2 ASTORIA 3 B 0.24 KILCHIS 24' C , ' 0.15 BRIER DELL 4 B 0.20 KLICKITAT 24G 3 0.1 Bit IEDWWELL 5 B ' 0.17 KNAPPA 2p B 0.37 CARLTON 6 B 0.32 LABISH 27 . U 0.2 CASCADE 7 C 0.37 , LAURELW000 . 28 8 0.43 - , . . CHEHALElN 8 C 0.37 MCBEE 30 B 0.28 CHEHALIS 9 U 0.24 MELBOURNE 31 B 0.24 CHEHALIS 10 B 0.37 F)ELBY 32 C 0.32 CORNELIUS 11 C 0.37 uLYIC 34 B 0.32 • KIITON 118 C 0.43 PERVINA 36 C 0.24 - CORNJELIUS QUATMltt 37 C 0.37 VARIANT 12 C 0.37 SAW 1 38 C 0.32 COVE 13 tl 0.20 TOLKE 39 B 0.28 a._ COVE • 14 0 0.17 UDIFLUVENTS 40 B 0.17` DAYTON 15 U 0.43 VER000RT 42 U 0.20 DELENA 16 U 0.43 WAPATO 43 0 0.32 GOBLE 17 C 0.37 t4ILLAMET fE 44 I 0.32 - GOBLE • 18 C 0.37 W00OBURN 45 C 0.32 HELVETIA 19 C 0.37 XEROCHREPTS 46 t' 0.43 HEMBRE 20 8 0.32 HAPLOXEROLLS 46F C 0.32 ' HILLSBORO 21 B 0.49 XERUCHREPTS 47 U 0.02 ROCK OUTCROP 479 NA 0.02 HYDROLOGIC SOIL GROUP CLASSIFIc TIONS a A. (Low runoff potential). Sods having high infiltration rat©s, even when thoroughly wetted,and consisting chiefly of deep.well-to-excessively drained sands or gravels. These sods have a h gh rate of water . . transmission. B. (Moderately tow runoff potential). Soils having moderate infiltration rates when thoroughly wetted, arld consisting chiefly of moderately tine to moderately coarse textures. These sods have a moderate rate of water transmission: In ,,I ,- C. (Moderately high runoff potential). Soils having slow Infiltration races when thoroughly wetted,and consisting chiefly of soils with a layer that Impedes downward movement of water:or sods with moderately fine to tine textures. These soils have a slow rate of water transmission:: D. (High runoff potential). Soils having very slow infiltration rates when thoroughly wetted and consisting chiefly of day soils with a high swelling potential,sods with a permanent'high water table,sods with a hardpan or clay layer at or near the surface,and shallow sods over nearly imperviOus material♦ These sells; have a very slow rata of water transmission. . From SCS `� A-6 ri ti 1 kf + . 1�/.. , �r _ u • s 4L, r 1 1,nlnrt I.,e I IL...n.e ti 1 .lvur•tbt J.It 1101 1.&Talbot hn 1a11i1wIi.0)1.111)It 118)6)S.It 411)7 4, �._.�..o.�.....-�� ... a ...�..�..�. s$.... . 4 ct•••1a nc III :n ;ul n1 611: f)1 711 Iln Ott It 11.0 2484 3511 :tN! 350 4940 4aA hull 604 7110 01�! Clw plMUl r '"II" ••'. ..IA III (6 11 11.111 11'1 9 111671 118 1.171:11 17.1 ii 1'17 3) 11U bI )lilt 'll;il 11111, 1011 11071 11172 (1373 11631.AI/131'.:(2111 1'1411 1?741• IJI76). ..,---•---.e .. 1616...__ .-..•...._._..�-."_... ..0.,.....0 lb Its 11 iv; 11117 it Eli - Itny At18 t16r1 11 tnt I)till 011;1 II ID 14110 tall (III `6.13• A(2 "A..- '41:1 AE1 0.14 01! '1114 916 914: • 11,1 1, t 11ila Iiu, n to 1i to 1111 II it 012 1112 012 111: Il11 1111 11111 IIIG 111:1 1114 11.17 1117 -1110L 018 .11.111 911 .U71I ' 8 ,, ! 11 1 1 1 31 1 l% 11 I:. 11 111 I V II In 4;19 1119 0 711' :111!:1 1116 0 711.1'0 74 1111 1110 037 °113.4 :1111 0111 9!17 U 33, 41411 1•" ' :; 1 1,H 111d 11711 1117 11 I 11 7!. : .13 11 ii 27 ti vu 1129` 0:17 11115 0:18' .0 III 1112 0 13 0.16 046 0 19 0 61: 0 51 11:65 O 53 c • i 4 II h 11 t1 I)' II'h. 1)7111 119.1 1' 159 II 0117 A;Ili n 4U v to I .115+1 111')7 1'11;:'1 utro 02 •atl 0 AU out, I tla , ...16,...16. ._ ....... _ 3 0 3 T 2 ',. 1 S 1)11 n 24 n:7 u 41 tl ak 11 l 1 n 1S 4418 1161 II 6:1 U fib 0 74 0 85 A 91 1.'44.1 1 137 '1,13 1 713 111. i 41 :?,I bt ?U I ii9 I: n;1 1'1'1,1' 11 31 1111 3 331 11!.7 ft nti 01111 n 1',i 11x7 - ci `71!96 )1111 I III 1.14 1 11 1 41 1'611 1 45 I..7$ ` I UO 2 1+2 1 18 1 412t; 41.11 a,I! a:/.7 14411 0711 0 0t1 1171 it in 1162 1 AI 1.17 1 311 .1 13 .161 1 65 1.75 ,1 41 2 03' 218 133 2.41 7:61 , l.. 1 6 14.11 a t I a:.! f 11t` n lit n 11 1111'1 n 80 O J 1 11119 i:1 1.10 1.0 1 72 I lib 1.09 2 111 6 21 2..19 3 02 2 1+u 2 91 3 1;1 1i 11 17 0!19 1)1.1 9 71 U,B:1 n III 0 tin ' 1 103 1.1 I 1 17 ( II I fiG 185 7 U1 2111 2 35 2.49 2.112 2 01 3 10` 3'12 3 61 3 i i 16.,..16_-.....16.16...,,.__.... • .._. _.._...� I.1' I ill a 1 4 111'1 n,6 Ii 7 111+7 I Itf 11,1 127 130 1 11 1 418 1 131 3 10 2:t7 2 36 2 74 2 90 3116• 3 IS 3 63 3 87. 1 11 4 3:1 • i! 11!21 II 11 1+66 1(I.I 117 111 117 4 i 1511 i1'11 11,13 ?2:4 .284 2.74 295 510 334• ?iti 9.81 4.18 147 471 4I) i I:S 11 '1 II 403 I17 1.1ti, 119 IGI 172 111'! 101 216 371 301 '3813 3511 3 S .4U8 1.90 Olt ` 608 543 873• GUB t!. ` ";I i1 t 1I 11411 162 I m1 192 3 11 219 7 43 2 5G 3 13 ,162 4115" 4.43 4 20 6 1.2 6 13 612 11'!7 8.11 171 1.05 6117 ti i 161 111311 iiii 1 6 1 D 21? 1:14 261 212 28a 3U1 372 410 4lil -5.12 SITU 608 615` dUCi 1.46' 3111. 8Gt1 D12 Ulit • 5 I 14 i 79 187 7 23 7 68 2 88 1 ill 3 i t 9 65 3 el 4 68 5 n0 S 77 0.45` 100 7 63 8 10 B GS .'0.12 0.09 10,79- 131 61 `,17 21 i 7 U0 i• ' • 1+..1 17 1 51 2 13 2111 , 3111 3 37 3 69 : 109 411 4<83 171 6 81 0.15 1.54 8 76 8 67 9 64 111.11 10 67 1 160 12 G3 13.49 41',31 18 Un -!. 4 f 95 I i6 76:1 31.1 `:173- 116 11.6 491 527 510 500 7.24 833 031 1020 1102 1110 4240 1311 1441 0443 1564'- 46 G0 :17.87 184.1 :' 4it ;:51 :11.4 4:9) 51):1 -561 1116: 044- 1.11 751 7.06 1 071 11 IS 1251'137?: 1488 1591 1G(17 11.18 1048 2101`'2111 9386 25 1). ., "' ^' 2' 11 5 86 5 67" 114' 7 to °d t1 8 95 0:43 '11 55 11.91 1101 4613 17 G4 40 84 20.00.24011 2310 2105 76.67 28.21 211117 ' • • 415 313 467'` 5rot 6if) ;23 79'1 835 01.4 370 1027 ;1'182 I.1/0 .10 i0 19'17,2dd1 21 48 77 BA ,7561 2701 2ti00 5001 343'1 • •:'r I In 41.0 664 -611.1 .01111 896 4 8 '11160 .,11:32 12110 1765:-1550 1704'2 711.01 211140°1 9101 ;5 30,:2681 20`20 3027 33 48 3,9 7' ,99.96 4011) I% I 61 a nu a.13 9 61 11115 11 17 `1111- 1_330 11 47 11.111<18 62 21 84 9103 24 33 28 11 30 16:3124 33 UJ 37 73 44 22 4 07 to 60 48 07 a ' I,,. ._59 5lit 197 - 910 ..1177. 17GU� 1181. 4401 -14444 1601 1707'-2183 25,2: 90 in 3997 33'91.1565 17,81 3095. 4364 41.111'. 4,)f; 4341 .4_,,:11$ ' S:, G 1a 0 1' 11 22`12496 '11 78 15 87' >I1 I q 10 32 IV 47 7110 25 09 7001'3139:"36 48 38.31 40411''43 46•35 au 81418 54 211: 0114 GI,45' ° 1.78 '7 f.P2 - 9411 II 4371.1 1471 If.69 1041:1 4�J:a 20"4a. 2155 48 110_ • '4840 i) 4 91;go .11'4'1 :I 1 R8 0a 33 1:1;12 2'110 -412 6711 6702 •`611911 61 60 GB 15 i:II 7:I; 41135"17 48 116,4 16 91 41'91', `'43.4I ''1*?I 71'110 2:114' 76 15 32-71 :141611 10.10 43 31 46:Vi 11111 41.17_'6611 .01.95 0 18 G 15 74'!1 I• I 1.i,7 1 11 11)41 14 04 11188 '1!4141 14167 .71.17 9:1.07 151:11 7600 ~:31 GB al 9s 49 IB 44112 ;19,0`1.63 31 56 60 GU 00 616140 10 60 1./17 00 05 81;18 '• ;' 111 5116: 11 741 IS 65 Ii 9G` 70 tHd; 21 119 '1.4 75 2519 711 443 28:49 .3177 •1'1'1'45 4189 49.47. 62 41 4018 '60 21'6118- 69 51 '141 17 80 30 .185.17 81178 4 1 ,s •3110 1'1111 1801 1946 2167. 411114' 2',87 21410 20.11 :14317 37814313 488'9 5354 6783'0186 1+660 G9-85 1575 .-®1.81 :11.40 411.1? 977'11. I t 'sI4 - Ill'.'. 11934)4;1d JI ll 7:!341 a..M.. •414131 4 • :9 85= 1t Gfi' 331tl` 44 88 47:211 4717 67,$1 6714.•65116-94.04 '14'63 11.76 41131 01 41 Jt1p l'J IOG 6S ��. ' ;14. 11::;13 1..1511 '119 SB '1'141• 7:•X13 ''2160. 141 U'1 SII 07 3301 34 74 43 78 4055 8691' 6101 4,11 87 11:46 15 81 10:02 .8184. 9157 121)till 107.23 11x113 _` 4, 1911: 17 0,1 11411 41 114 26 88 29 14.'11 WI 44(0) 36187 Jtl ul: 4055 8376 40:1.0 65 84 71.14.1607 81163, 1100 99.10 400 87"101.61 11403 1211.10 9',' 1191 41301°:7114 ZS.11 18 I f 11.19 :I l f.J"55 01 31111 40 18 40 2) 50 87.6:183 G0 6/0 :75.19' 84.38'115.21 6!11 b l 6012 104 3G '113 64 130.34 177110 .i ' I t 'x1.1. 1'1 3134 18 049 ;1l 11 2612' 2987 1212 ':16 31 97.18;40118 47`41 8011 40:14 0111073.12 1003•9140 6064,0110 1111•48 11111 41J 48 $1013 193:69 .. ,Ldtuhl)et lu,ra` . `• _ 6St1ai3 1,AliSf-: _ f y a 11 1 1 a1 Ing 1 11:2511/ 1 is$..lnlayltt.lelt 1+11111• t iI t Itsf0Sl- y, 1 1:11)41- 111211 1•tleq.q ltltpll.;(I Ills 1.03618$ fi Al•-11Ptri t•1011.rnl rltlnn41111154551414151411141151.11110 61411 '''''.I� ly 461 tu**Isp.i�.in.0710 t1' ss I lu)18 1 � - < fie 1ut,•6y.rv13Iv15»aetal .#. . sa a• ..': e TABLE g; • c•VALLtES'MUJLCl FACTORS .1* y; •� r Type of Mulch 'Land Factor Length x Rote Slope C b -m�4: mulch • • ' You per were Fercen! Fret - None 0 all 1.0 --" Straw or hay'. . 1.0 1'=5 0.20, 200 -list# dc►vin by �0 6,10 .20 l Oft anchoring a sd: 300 ' trar:king 1.5 1.5 12 cq�uipment'9 E.5 6-10 .12 150 6o.• 2.0 1;5 06 4 2.0 6'.10 -O6 200 ' 2.0 11.15 07; 1. 0 2,0 1'6.20 .11 100 2.1025 .14 75 2 0 26.33 .17 S0 2.0 3:4.50 .20 33' "r Crushed stone, 135' x:•16 05 200' 13.5 16.20 .05 150 _ •t3S 21-33 .05 100 135' 35-50 .05 75 'l Do. 240 `2) .02 '300 240 21.33 .02 200 245 . 34.50 .02 155' e :`., 1Koad 7 <lb .03 75 .:. ships S0 • 7 16-20 .08 12 <16 .05 1'90 12 16.20 .05', .1Oft. 12 21-33 •05. 7S` ©o. 300 1 25 16.20 02 150 33 02 100 2S' 34.50 02 75 • E ' From Meyer and Ports (24). Developed by on interagency work-:. shop group an the basis of field. a:xperience and limiter! research data. "Mon mum slope length for which the xpetif ed mulch rote �s considered effective. When his limit is exceeded, either o ;higher ., J op;slico9ian rote or" mechanical ;hartening of the' effeetwc ,lope;' r '' b length is required. 'When the straw or, hay, mulch is not anchored to, the 'soil C values on moderate or steep,slopes:of so' Having K values oreater than 0.30 should be token of double thr '.vela.s rgiven rp this table 4 t A '1.;'.'''''' '.5.''''''''''''''.‘.} v ' . x 7 i rxi 4 J by ' ,. t. iA p ''p 7 �} y '.yr _ ..� F, il9 , y• i4 5 ��` l .f+# ,: a ;� ix 4 r i : '#s,}{ N _ ::.S ° � t+Ex �t E r . t. r • ■ m' T°i2 C®t�ENa T aat� Cbt��TRUCTI0 NIES ; MI 1 • umimiliiiiiimillillinumniall.„„„„.231111111- : > -• '''''- - . 96 ki‘1111111111111mmilier111111111111.goorililliiirnimillirlialli . ' ' . ' ' - - " .: 't...., . ge iiiiii,,III•milimion,iii."- - •„„...imaimia. . , .. _.,. { , . 85 r� 80 111r !-...,...' : . 76 �� - . _ s14 _ :. , 70 � . a 4 • C , X35 m 88 ' ins -•-••=111.1•11_________, oil 101"11". .. . , , , , . .:_,_ - _ . . A 5 ® , ...ww . . . . .,. ,, ; ,,_ ,1 ,..,_ ,.. _ , , willitalillUMINIZA11111 . an ... _ . , , '''' ''''';'' - '. C ' 513 - MI Viliallnlala . 011111111 . - . -.:.-:: '''''-'',-;--. . T - :45 11111121agileil ' laillumNIMIIIIIII/Illialaglill -' ' - - 0 '..-...,-,-,:.-.3::".-,;...., ..-:-. - ' S -; ; 30_ imilliglinigiisigillih,tialiaMOIlli.......M1.11.1111111- _,........ LO oRBED -S . . ,. :, R 35 :---,-;-_ -,'- '-:---'..-.,:-1-_- - - . .- .,.2: - ' somalli . amobow. ....4404,11 1•1•1 - . . .. ,-- :: :-;:,:.---:--- : ,- --.- - - -- - 2.e - Illi milli L 4!''' .7.i... .. -; ..milibil,- :.7.7..rWillit..,,:..- -r , , , - -,- - . '. -- . ri 05 .. �. TI ON AND �U� +OOV�R � �. i�ERC�NT. :.�,IE�G�T� ,LL y y , *` V )} J ' - n ntRcErrOR S�rdAI E F1fr`ll1hE y � 1 hrnu►. see Floc/ w . :Oil/ 1 c y ' i. 9 Az gang a O .20ti.ct 3O47 i-- ,, 1-4--e__-- dtt5 h s11aU be levy t 2ieet mitut tfte'bon �onom 1N�tib q foo3 min.rnurn r Oeptst' �,. Side Slope 21-1:1V or flaner Max utn S petceta•ant's poSar',e drainage to su sable outlet o . Grade (surf►3s sedu 'c at un pond`), Gassed cratute!or. ....p">.. Seed as Per wto banx and'em at least» • Slab�7tion Roc IC 12 iaschCs'inick. , Inches vertical!corn me.bottom." t •r f R DiKT'S , .----�—TFNIrORAR y 1�i'i Ei3�EPT© ,z. • 0i1.e cratorial corrbsz004 to 55T:Procto ' ,�.,- CO, 1--"--7---‘-1("' i " . .�.r• ' O �_ /MhrCdP for-dsue sPac'r'q Qe 100'.=00. r• I300'Ocpend�ng nn g fJ sip L f 10 '.# F1GUT E 3 LEVEL SPREADEYt IritercePIoC 8eciTs. . ' ' ,v , etCepta1':3 J,I'''',,*1..'.--- .,�'Y,w:� 1 Jd � If, :. n r, +I .� I ,r„�" �/ Chan;lei Grad (,)0i, Stabilized.S Ope; , �S �P� rave=l Eemn S preader �!`Y ' t�'laYtet UcxYbswrted .A:• ' rib i��t�l/• .i•'i �r�'- I/ 'Z:-�'�rtlttef r PIY+. ..�!/ rr_ ia�/ -•; :(YSI�Y Ir'----- ; NCO , .t 5 t t` t S l h,.l 1 ' =''t '''',,k -114 a,: �k ' y ar-z r tst ati,e a a' rS" ,J�•1 a 3 (�} r t v 3.r b. 'ra� "' �. j51 4:•_ - 3, � �, ..� t m:_- mtvrw -,-1'• tt a , i * •� •r , '--'` ,- ' - ,AZ•V ,' , ' :41,1.!t*7 .%,,,___, , 3I 4 1 )s /)// /iiiiijef V ' ' - '` - . 4,.:', ,,,, : - s. ` '`Z ' - til'1: g.' c$ .1.7 k%, ' i' ) //)h)' iii . ,'. ' ' _, ,.- .,--=--... ,. s t'•..)., f el°. .,..c. • "J''' %°`• ••• : .' • 1 9 ,iiii -;,-- 1, ,_ , N ili.1 ' ,-'-"-' .,t ) k) f) % ) ' iiii) /7//'// ' ' '''. .. ' ' ' ' ' '‘I ...k.- . , 4-4. I.:,A,‘, . . i iii,,,y/,. „Y) , Li fe ,.:. . .11:1 ..,. .. . ....)...t. ..i.:.,.. ..., ;0 ii ni., iiiii,h/fill 1,... ;-, :.,. , I -.''''' , , .. , _ . '. ' . _ ,Lti ... .4..,... ..11 !,,,, \ a.t . ,,,, »#)9(,iiiii ‘kl — _- ,.. , _ . _ .. , . t..... k•ca, \ i',i ' ii)P))sy I r i , , .. . _,. , ...,,,. ,. , , ..,1 —s .) .,1/9)/i1.1, (J� da 11,\ a� ��� .\.* mi -' . ,. . . '-'-.:„4:,,, i., 1) \ i'4.1',,,,ii...P . . 0 -...-,,,z 1-- -'- ,,,. ' - - ft -`4 A - A -i'llr'/'14i). t. N . I-. . x?i_ii .}. if i ) . .. 4 '' - ' 4‘4.) t 0 ii 4%41 '.!"\tt r p ` rt � �' 1 /1/l �/' 'nt� i- •' t°� 1 1l, U �,.11 1 (1.#11()1/ 9 . • ' t. ' . - . -- ft w�y 4 .` ► I1 1 �1�bjilille,'ilte didiS Ai 119199 ■ , •• -", . - . ' into a stabiz ot 4.4''i ..''' ' ' ' • . ' _ ' trapi:ling dev.•-• / .7 .:„;-• .„--,.-/;■,?, .Abs pipe . - - ' • . . fl, 3° •.• ..: ) c.-----.--------7,,Plb°ws . 11* 1 .• / ---C--.16-rilifin wall 2-1 • . ° , s . , ' ,.• .4 or ADS PIP\A q4 :ie - • 'llailt).! - , ' ---: , ' , '., - -'1",,, -,"A\ ',,.,„,„. -,..--',,, '.' ) ' ; ' .'. -, ' '::-'''t.'_,:.- ' -,..:-.' '' ■."1',.,',4,.7--":,7*-t''' ''''.-'1„ '';',-",41".1,.$'-!,1"'Al"; } Y F , ',-,-.,',.:'."-,•,: � 't♦ tt t �`.•�IG�J E 6 ST'kBIL1ZED C®NS' CTI . t j 7 r• t 1 4®0 ft5 I1 lo yJ\i;► ll"ite 7 t�eSi �tgi �e® . ' R n ��63'r�ss dr. ia ° y ..� � #r ,i L �' 7� � ,3 ,--'.,:r-::4!-� n Y d aRr}� ,.t. ls'�tik t, .�',. ; 4 SN 1 I 1 d' i i,. i t ti k . a 'R�s 'C t r t yF ' � yl. . i kP ,M,Sr W' a G .� 4k ti 2 55-.c 2 F !1,!, ..l' i w � r G 4. 4�Y ' 1� .. - N - • k i4M� a s r x +sxr ,t4 -t c''tti;, P s� aT3�"'r*. ..'` ; 7�? �n� r :"'';:'''''+':::'.'.'' �� t ys, •o�` � I: '���r w�.�i �r .m i"*--'"E."'''''','":t �.L� ,�Yt1.:.. } t�� "fit ' '�� Et k -■ �r• :.*:::*'...::: ' . ' ' i'' 11.. "::: 1114]0F :'1;1'''' '.01.tliX314 ) 61614'61.1Y74341Nr.') SilllIq3, ,U.CN .'1(314' , '''',', . ,, ', ," ° . ' ... October 2,, ,1989 Randy Woolelr • . , City Engineer City of figadrd PO Box• 23397 ;` Tgatrd, OR 97223 1.i:-.--.'.1:-.:. , 'Dear Randym As you recap , the LQC adopted rules for erosion control during construction, and those rules need to be adopted by each jurisdiction by January 1, X990. County Counsel has prepared language for the County to adopt these rules, which hopefully will assist th% Cities in their adoption. Enclosed is copy of the proposed 7.anguage. Please let me know if I can provide any additional information. Yours truly, , , ' ., - , ' ,' ' s,. ": Christopher Bowles, P.E. Division Engineer Enclosure t FIECEflf j OC1 0.31989 Catttunrel�peat' la . a •i 150 North First Avenue,Rohm 302 < ' Hillsboro,Oregon .7124 Phone 503/,848 8821 , y, 11 , 4 F �.K r {I? { Pe � - � ,••g�i+.ik&+f,.f.+ -,vii-�—�'1-.i.«:.::+v. a ,4.�+.3,w�.«.a� ..a.wc;.7....:*..%... .1 i/� I Y h 4 V ��� - 7t4 _ - RR `� - I, ,O ( � A ,: i;1 i[.;.. c c a c= am 4 tai '' r ra 4,, 4 e $ 2 .. z r = N rW 7� � t� i i ; '''')''' i, ;. a '1.'.r i r'%4 ' - , - r • ' * ' - ' ' - ., ..„. , ,,,, ,,.. ,- '-. . 'f.-. .. .•, . .4. - ''''`. - , , ,, , , . .....,..:. . -. ..,::::,,.:,',--. . ;--........'.'. ..-. .'.- .,..,. - .-...,..,''' ' -,'' ,,,..=:----,,,,.. :. ,:•.'i .,..'., '-.... - ,,,i, ..:.-.'L,,'',. , ,,, :,',. --:,--0.,'. ,--.,:\,-.‘,..:.'.;:.,,,..,:.,..;.-' ..',.,r'-'',.,7, .',,,._,. . -, ,,' . .-.:-.:.. WASHINGTON- . ' . '- t '"COUNT !.::, .. • 7 .:.' * ; ' ' '' '' ' ' ' ' '' ' ' ' arittl'ent Corrispoti(icti,c0-- inter-7,t)el) r. - 0,9/11/89.,•',,.,-, . -.:... , . , . -4.. To, -.' .:.. ., JoAnne . Land Use arid Transportation Dan R Olsen , . 1u.9,,89 Chief Assistant County Counsel .,....... subject .i'MTERIN EROSION CONTROL, : *...--.....-•• ' _ ; '''' - ' ' , , , •.,,.. , - ' , ' .- ' - - • ', . ' . . • .. , '. ' ' '' the interim, . , Attached. . are amendments 't° the CDC to imE:!1,ettm74In addition,' • -:. *•`' ' lei I added a. section "Erosion C°11t.r133-' '. .. ' . . .... .....,.,•-•..., . . , ,., amended 201-2 to inform applicants that- an exclusion from the i....., ......;,. , . :., dapepverolvpapmle,ont an erosion requiremenit .dlo plan ns..inotunnne.ecce.essP,saarriyl.y!, Illien t? erosion control P .„ . , ,. , in my opinion, the SCS UrensiovleurtsaiolnSaenldl, oLordsesr!quo4ntotbne.coo,tuhleC3rbhe:a'nd',. .. adopted and amended by ''.i!...._,,,z.......,...1'.,, wpneartheip.ss rietqushioreudldwbiethoiuntclruedfeedteinnethteooar, dddinitai.h,-pene 'l7omae..tv, ee, rrY3,aoln..se.,,k:-1,;.°,7s ' .' '' .,,'•‘,.....:..7:. - ... • ....,,, , • , , , .' :' ' •• ''. 0.DEE:03910 : .., , .' John M. JUnk3..n, County Counsel Agency _ ., . ..-..,,,.......- , John_,... 7 : Jackson, Unified Sewerage , I., Jerry Parmenter, MSTIP Manager , .. , , . . .. , :...... _. '-'. ..'. ' ' - . .'• ' . . , .,,. .,....-. ,. . • . '.. ',, '• ,, - .-.! ' , , , . . . . . . . .• . , . . .., . , . . . . . . -4 en : . . _ . . . , .. . . , . . . . , .. . . ., . . . . ... , . . ' . . . . , -, .. , , . , . . . . . . . , . , ., . .... . . . . ... , . . . . . .. . ' S r . . . . . . r. '. - - , , ... „r •• „ , „, , ,, , , •• ‘, .r . . , .,. . • r, , , :..... , , • .. ., . , . ...., , • , • , , ,, . , .„., .r. •,.... , . . .. , , • ,,, . .,,,, ,, ...-,, ,. . ., . .... ,•,. . ' ,` 1 . , • •..., • r., • . ••• .... .......• • ,, ,..„ '''.. , .• , , .... 4 • .4 , .•:: .. L . . . ..■■ . . . .. , 4 . , . • . 7 .• • . •. . . ... : .....:: ' . .. •. • '. V, i } ys I 1 : 426 EROSION CONTROL,• 426-:1 Purpose .'and ;Intent , „F• Thies section is intended' to i:mpleineht the administrative rules 'of,, the ,O'rego.n' Department of i Environmental '9u7:'lity- mandating. erosion` control measures in the Tualatin River' and':Oswego ,Lake T1-,1. -a 4-6-2 Applicability 426-2.1' Notwithstanding any other provision of this Code, compliance with the following provisions shall be required of all land "development, as defined below. 42'6-2.2 The following subsections shall apply 'to any new land development. 'within the , ": .:-.'' 1 ' ' ' ' Tualatin River and Qswego;,Lake sub-basins, ''''':_.*:,,•-.„,..-. ''. , ' , , . except those developnlents with application . ' dates prior' to January 1 199®. The application, date shall be the, d' ate 0, n which a comple.te ;application far development;. approval is received. by Washington County." in accordance with the provisions of Article II: , 426-3 Definitions 426-3. l "Erasion Control Plan" shall `'be.;a plan containing,a list of best mahag.emen't a i practices to be applied during construction to' control,• and limit soil erosion. v< •• T'.' ♦Y ,, . •i:.; t + It 1 .k Jl 4ry , { d= y t ' * 1 Page r r .x 426"-3 nd a"e've1opment`" re£ets tQ any human Y induced ::change. .to: improVeo or unim roved c_ real estate,,` incl"gdang nut. not :limi'ted to construction, instal;lat�on or:expansion, of t• iZ Yx a building or other structure, ;land ` d v .sion�, drilling, and site 'alteration such as that<due to land surface min�.nc dredging', gradlne ,' constr'uctioi; of earthen µ J' berms, leaving, improvements 'for use as : parking or storage, excavation .'or clearing ' 426-3 .3 "public Works Project" means ary land+ development conducted 'or a financed by •a, f: local, •s'tate or federal. 'governmental;`body:'� .ff. 426=4 Erosion Control Plan.. i No preliminary plat, site plan, developmient; permit,' building permit or public works pro:ject shall be` •approved unless the conditions s :of. the p3,at;, ,permit • or plan approval include an erosion control •plain., containing methods and/or interim facilities to be constructed :or used concurrently with land development and to be 'operated during constructaen to' control the di"scharge of sediment, in the stormwater runoff; The erosion control plan `shall } utilize: A) Protection 'techniques. to' :control . sail', .erosion and sediment . transpor,t ;to . fens than one , (l) ton y` ►,er acre per: year, as 'calculated us :ng the Soil 1 1 4 5 p y Page 3 � ': t ' a Conse.r`vation Service Unirc rsal Soil Loss Equation' or . other equi,vale t methods, ias°'may" be establi hed b 1. ' Resolution and ©rde`r of the `Board of County Commissioners The erosion contral plan shall include` .temporary sedimen... . , .n^ basins when,..- .-•...,- ause of" steep slopes. or other site specific considerations, .other cry site sediment control methods. wi? not :likely; keep .the sediment , trar:sport to 3: ss than one ('1) ton per acre per ear., ' Any sediment &asins construcEed"=shall "be sized using 1.5 feet minimum sediment storage depth p'luls :2',0 feet storage depth above for" a settlement zone The : storage capacity of the basin shall be sized to store all of the sediment. that is ,l]kely to be transported and collected during construction �ihile_ 1. the erosion potential. exists When. the erosion potential has been removed, the` sediment basin!,...or• other sediment control `facilities, can be .removed ,, and the site restored as per the final site plan. Ali sediment basins shall be constructed with` an -..::::;,.... 0.,ix : , emergency overflow to prevent 'erosion or :failure. of the containment dike;: or • B) A soil erosion control matrix derived 'f'rom, , and consistent wt1h, the universa"l soil loss .equation approved :by the County Fby Resolution and' Order or the Department of Environmental Quality.: 4' i W4 .1 k page 4 r; 4?_5-5 Review s , 426-5.1 The erosion control plan shall be reviewed in conjunction wi.t.h the requested development approval I.f' the development ;` necessitating an erosion control is exempted by'.Sexton 2.01 2. from the requirement o Obtain •a development,',permit, '' the approval. of 'the e.ros�ari control plan.;r '-'..'.1':::.'-'41:1". ' '' *'''' I : ' shall be a Type' I approval ', . 426-5.2 The 1)epartment, may'''defer n submittal. of a erosion control plan] for a land` division. if' , . no construction, or physical ;range, to the•land is to be? commenced and the 'land division would not otherwise interfere with„: ' future compliance'=with this section; ' :::-.-.....:..:'.. '.'-'..;'..'.''-'..!.., ' * Approval shall be conditioned to require an approved erosion control plan prior to 'any 7 physical change or construction. , ', ,..- ,'..-, :,''''',•-:-',' 426-5 Compliance i..,11.'''.'.11.•:::.' Failure to obtain or implement an approved erosion control plan shah be de a violation of`~this. , ordinance and may be enforced by ca:tation or, �, re ocation of the relevant permit. Compliance +pith . ...1_, this section is required in 'additio�n to, and not in lieu of, Section 410, Slopes and Grading' .' ', .' ,. ' ,-. ..'' ' '..,„,',',,,...:',„, ,,.:'-'.,,,, ',,.:. . 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' '. 2.'. - -,..'''.: ' ,::...:,;,' ',",f;1`.''',4',7..."',''..'..'=:,'•:,:'',;14',!,.,,,tt.(`.(; ",' . .^ • . „ , . ,4 ..... , : ,,39107 0..bEE:v . . . ,„.. .. , • " , , . , , , ' ' ,0, ., '. •'.. •..... _;" , , ,* . , , ' .. . ._..... .. . .''• . .., ,..,...-. . r � Y ' 9 t, i s 4'10 1 .6 'fin addit :on to then erosion .contr°o1 p1a required. by ..Section ,4 6, the fo11ow1 n [A] sedimentation and: control plan• :requre'd ;when.: fi A DRO<DFE 03910-7. fi r i J x: U 1 .,,,',,C''' V D tk l ..: ., .: . „. _ . _ , _ , , , . - , - Y, ', '' ' ` ' ''' ''' '' = „,012.1gi , _ . ,,, ,,,,,,,. - , „ ,- - , . .. . k r �•����r~� I �,. Sa...s.; , ,, , . , _-: - , . '. ,.. . _ unity DevelO den, managers `' IPRO14 Fandy Woole f f'J� DA July !24,, 1989 - SUBJ CT: EQC.. Water;Quality Regulations least week +the State Environmental Quality coecaission,:adopted new egu ations. which will .affect construction .pro ects in the Tualatin R ver aaeiaa. A' copy .of' tae;:near regulations is .attached.. The sew'regulations apply`to projects for which an application is submitted after January 1, 199®. The Department: of E�rvirox entaal Quality plena to develop simplified plans ,that can Sam used more easily by the small developers, especially the 3�asilders of dingle family homes. . DEQ is also .considering an education program :to help builders and inspectors to better understand the requir+menta I would expect the education°program to occur later this; fall. 'The :QC is still considering potential rules .whic�sr`would put additional requirements on sew developments. These additional __bee would ;po entially require .permanent storm water: treatment facilities<.for .some developrnentg. It appear that thesis rules, if adopted, would not become effective befog March of 1990. The` EQC will probably again consider adoption :o additional stakes at its Movember 1989 meeting. I suggest that we begin to make developers aware Of the additional. rules that will become effective on January et. Q At this time;' our notice of the new males can probalxly'tae ir. an informal ba�o4e, through,`pre-applicatiot conferencee and: other discussions with developers. Any 1111°L-'15 formal notice of the new scales can go out later in the fall as the effective date ;becomes closer. In the .: meantime, I sagest that our staff should begin to become more. aware ,of the upcoming rules and of the existing City regulations which can be enforced. to ;: control construction erosion and sedimentation. d39wM-rM®.RW ; „ .' • t sl ■ �v r ;r" '414 lr/? tl rF: • r M L ( ,, S R L .. i Y 5. i v ♦'•- .j r i G Attachment A PROPOSED ROLES 340-41-006(18) "Land Development" refers to any human induced change to !.. improved or unimproved real estate, including but not limited to construction, installation or expansion of a building or other structure, land division, drilling, and site alteration such as that due to, land , surface mining, dredging, grading, construction of earthen berms, paving, improvements for use as parking or storage, excavation or clearing. (19) "Jurisdiction" refers to any city or county agency in the Tualatin River and Oswego Lake subbasins that regulates land development activities within its boundaries by approving plats, site plans or issuing permits for land development. (20), "Erosion Control Plan" shall be a plan containing a list of best management practices to be applied during construction to control and limit - soil erosion. °_fi (21) "Public Works Project" means any land development conducted or financed by a local, state, or federal governmental body. 340-41-455(3) Non-point source pollution control in the Tualatin River sub-basin and lands draining to Oswego Lake to bey provided after 4inlestute==let Janaar 1) 1 17°10° (a) The following subsections shall apply to any new land development within the Tualatin River and Oswego Lake sub-basins, except those developments with application dates prior to January 1, 1990. The application date shall be the date on which a complete application for development approval is received, by the local jurisdiction in accordance with the regulations of the local jurisdiction. (b) For'land development, no preliminary plat, site plan, permitor , public works project shall be approved by any jurisdiction in these sub basins unless the conditions of the plat permit or plan approval includes an -.. ;' erosion control plan containing methods and/or interim facilities to be constructed or used concurrently with land development and•to be operated during construction to control the discharge of sediment in thestormwater runoff. The erosion control plan shall utilize: (A) Protection techniques to control soil erosion and sediment transport to less than one (1) ton per acre per year, as calculated ®p using the Soil Conservation Service Universal Soil Loss Equation_, or 0 other equivalent methods. See Figures 1 to 6 in binU2i�IX 1, for examples. The erosion control plan shall include temporary` sedimentation basins when, because of steep slopes or .other' site.'>. specific considerations, other on-site sediment control methods will not likely keep the sediment transport to less than one (1)', ton per " acre per year The local jurisdictions may establish additional requirements for meeting an equivalent degree of control. ;,Anny',sediment WCSl69 1 : l f i ;C .1j " it x�t -; 6 i r t basins constructed shall be'.sized using 1 5,feet minimum sediment storage depth .plus: 2.® feet storage depth above for a settlement 'zone The. storage` capacity of the':-,shall`,be sized ra store.all` of the sediment that, is likely to be transported and collected,'dur ng construction`while the `erosion potential exists rhea,the erosion; potential ;has'`been removed, the ;s�diiment ba do ox_ other sediment, eortrol.,,faci.lities, can„be removed and the site restored as per the final •site plan. AU sediment basins .shall.be constructed with emergency overflow to prevent erosion or failu'ces o£ the coratainmenit k`. dike, dr. ,(B) A soil erosion control' matrix?derived from and consistent s,j w�ifih the universal soil loss. equsa+ ion approved'by the jurisdiction or .Ij i tile. Departmeant. i c The 'Director May modify;Appendix'I, as necessary without.. approval from t he :Environmental Quality Co mission ``tie, Director may modify Appendix I' to simplify it and to make it easier fox' people, .to apply (d) llss .local jurisdictions •adopt a Departiae=nt approved.program plan, i as regwired by 0Ait 340-..i.ha 0(3)(g), these requirements will'no.-longer: aPP1Y ® development in that jurisdiction • } r', D 'T,'''N X} t • k• a..4'[ .. t l,. - ,• rt k Y r {�GC5169 t' Pbk' 'tom t F i 4 ..),,,,,-,',-':',;.',::,t,,} 8, y. d1 h a i s ry t . qe, R APPENDIK�T , , P } _ 1 t rr ,-i„,,iI` ,5 i 3 a.:, ' r i W �+f{p��'e�yr(��± CONTENTS' I Table 1. Universal Soil'Loss Equation Viable 2 "R" 'Values, Washington County • Table Hydrologic Soil Group of the ,Soils ; Ta�bL' 4 LS °Values Table 5 "C' Values Mulch pact,ors r Table 6 "C" Values ;' A, Figure. ,1 Intercep;Orr Swale r Figure 2 Temporary Interceptor Dikes Figure re 3 Level Spreader Figuie`:4 Sediment Trap i' •_I •. ;. Figure :5 Pipe Slope Drains Figure 6 SLbilized Construction Entrance 1 Y Y fa 1 r _ 1 ) p t p a•. ` t A�z' : g . '• '' . "' ' ' " '.. '' , '--‘',:„'....f.,,,Y''',;'‘,., ''.'-„,, .i--.,;::,'',.'-'.-','.. i.:, e k g R a •=,.1=',••"'-''-',,,J.5 r �s, ' ',..*:-.,,..1-, .s °t . '! k atp C 1 s�9 '?'.2'..'•WC51 • '. { ' TABLE 't uNivERSAL Soil.t: SS E�tlA"t1- ' o . Gam Jpng.the sediment toratm vQlirmr -The sediment storage volume required is the volumes required to contain the annual sediment yield to the trap and can be estimated by using the .. Universal Soil Loss Equation (LISLE) developed by the United States Department of Agriculture.,• A = R"K"LS°CV"Phl' ` Where A = annual sediment yield In tons per acre R rainfall erasion index; K = soil erodibiiity factor, from Table 3 or as determined • by held and laboratory testing by,a geologist. soil• s scionitist,or geotechnical engineer. " LS = length-elope factor: from Table 4 (note, lengths. rneasured'are horizontal distance from a plan view) •', CV a cover factor,use 1.0 which represents no ground cover during the Construction process. TAeLE5 and 6 �' PR = erosion control practice factor, use 0.9 which represents f teacl9cing up and down slope. (Dozer cleat marks parallel to contours) a, Annual sediment yield calculation„ steer-by-step procedure: a, Compute the R value by obtaining the R value from the 2-year/6 hour;lsopluvial Map In TABLE 2 b. Divide the site into areas of homogeneous SCS, soil,type and of.uniforms slope and length. c. Note the K value from the SCS soils.t chart (Table 3 .e•for each sil type. _ d. Determine the LS value for each uniform area (See Table R ). c > e. Compute the annual sediment yield (A) in tons per acre for each•homogeneous/uniform "-- area by multiplying R times the K and IS values for each area. . - g f. Multiply the annual sediment yield (A)for each area by the acreage to be exposed (only that area to be cleared) of each area. Sum the results to compute the total annual sediment load (in tons) to the trap (L,). o The sediment storage volume (V,) is then determined by dividing the total annual sediment load`. (in tons) (LA) by an average density for the sediment deposited use 0.05 ton per cubic foot. • Vs Ln/f'as iYYY •'2 � tt 6.EG BILL! Y v3TRIP , Y ,� R'1 FACTORS -D' — 3 �asedQn 2 Near6hcir-ralnt it 07 i1i 40 5'° n_lersiiY snap, 1c,1+ifal!no 1n�lud �, o • f at* i0U1191 /23' _ -4--j -....* - I . . , I - ' _._----\----' • r. '',"- H ). . 1 L ' , f� � LI .. ..„...",:_,,,,,.._:.:, ,,,._.-. :.,‘,:_ ,•, _, , ,f1..., _.. 1..,_, /.57.c..: _,.... , ,,.. ,... .. ! t , .. , . 1 i. . _onccQli ' , .. sr• ....,.......i,__,._.;_,,,__.„.... ....,_ =_.•_,;._,_.,_. __...__ _..-.. . 1 . __ _... , ;:.„ , _.... . . “... .. .., . . ... ...:_..17.,_._:... ,.. _. ... ..___:::,_:.,... „3•--iNi.f-' , ' 'f--- ' -..,'- .-- .- , . -1_ 1 7j(i i • /CNY o 0 a i j 1tJnSF,19iNGTO14 =ii; "1 . , . .. _ , - `t a + X /ry ti 9 S z • JAiatiAflY 1975 i N: sr tr * °t `t,, , ,� - �4 -,� ,.• . t 11 1-- _ t � � ryas •1.•1 r '_, '.: M1. A TABLE 3 HYDROLOGIC SOIL GROUt' OF TUE SOILS WASHINGTON COUNTY :, ,t. Soil Soil Hydro- Erod- Hydro- Erod Nap logic ibility Map logic ibility Soil Group Symbol Group Factor, "iC Soil Group Symbol Group Factor. "K" • K ALOHA 1 C 0.43 HUBEILY 22 13 0.37 • AMITY 2 C 0.32 JURY 23 C U.2 ASTORIA . 3 b U.24 KILCHIS 24' C 0.15 BRIEUWELL 4 B 0.20 KLICKITAT 24G B 0.1 • BRIEDWELL 5 8 ' 0.17 KNAPPA 26 B 0.37 CARLTON 6 d 0.32 LAB IShi 27 U 0.2 ,_ CASCADE 7 C 0.37 ' LAURELW00U 28 8 0.43 CHEHALEM 8 C 0.37 MCBEE 30 U 0.2tS CHEHALIS 9 l; 0.24 MELBOURNE 31 B 024 CHEHALIS 10 k; 0.37 HELBY 32 C 0.32 CORNELIUS 11 C 0.37 uLYIC 34 8 0.32' KINTON 118 C 0.43 PERVINA 36 C 0.24 . CORNELIUS QUATAMA 37 C 0.37' VARIANT 12 C 0.37 SAUM 38 C 0.32 COVE 13 U 0.20 TOLKE 39 B 0.28 COVE 14 U 0.17 Ut3IFLUVENTS 40 3 0.17 DAYTON 15 U 0.43 VERB(IORT 42 U 0.20 . .20 `j ()ELENA 16 U 0.43 WAPATO 43 U 0.32 GOBLE 1? C 0.37 WILLAMETTE 44 8 0.32 GOBLE 10 C 0.37 WOOLDBURN 45 C 0.32 HELVETIA 19 C 0.37 XEROCHREPTS 46 B 0.43 HEMBRE20 B 0.32 HAPLOXERULLS 46F C 0.32 HILLSBORO 21 8 0.49 XERUCHREPTS 47 0 0.02 RUCK OUTCROP 47U NA 0.02 - cam' • --_ HYDROLOGIC SOIL GROUP CLASSIFICATIONS . A. (Low runoff octal-eat). Soils having high Infiltration rates, even when thoroughly wetted,and consisting t.. chiefly of deep.well-to-excessively drained sands or gravels. These sods have a high rate of wator • transmission. } @. (Moderately low tunoff potential). Sods having moderate infiltration rates when thoroughly wafted,and oil, consisting chiefly of moderately fine to moderately coarse textures. These sods have a moderate rate of water uansmission. :_ tai 01 C. (Moderately high runoff potential). Soils having stow Infiltration rates when thoroughly wetted.and - . consisting chiefly of soils Mitt a layer that Impedes downward movement of water,or sods with moderately fine to tine textures. These soils have a slow rate of water transmission. -• D. (High runoff potential). Soils having very slow Infiltration rates when thoroughly wetted and consisting . ' ` chiefly of day soils with a high swelling potential sods wen a permanent high water table.sods with a hardpan or day layer at or near the surface,and shallow sods over nearly impervious material. These sods have a very stow rate of water transmission. From SCS A-6 • • - ..< »; . t 1 6 ualass 6u 5.11.Wlt.`sllgce 10l:ill,1.to Int) IS+alnes lne:tultuwii e4gre lellyibt ft(oil $b I.'. s1.q..' tl...1e to 111 21) ;111 111 MI sal 711 101 911 1(0 1U: 2121 2!81 5100 350 -4110 450 6111)- 1190 900 850) 1100 11010- In''... 191511. 10 I) 1!111 '1122). t15'2) 1111:1) 1'11:11. 121 11 1274). 4:11151 (1111: 1611 17111 1911 111171 11221 (132/ 1152) 1163) 12131. 12411 -11711, 131151 'K n(. • it/hi 0117 41517.11119 0HO 0519 (110) 0119 0119' 1110 019 011, 011 0.12. 012 11:13 013' (113 0.14 0.11 87.1 015 1)15 - - III I 1 11111 11119 1110 11111 ti 11 It 1( 1112 1132 1112 Il 12 II II II 11- 1115 (110 9 1f: U:If. 9.11 (1 11 11 I$ 0 44 . 11.19' 91D `,0 211 n'" 111: n 1 1 911. 1110 1111 u 111 1119 n 19 1191 0 3:t (t 23 8 211 G.2!1 9 23"(1:19 /132 0 3.1 1131 0 an 0 37 019'- 1140' r i Is I I II 1/1 Is 211 0 22 1121 0"2:1 1 120 1117 11'10 1129 11:13: 0:15 Ii 35 0 10 O 12 4142 41.01 0 411 0 19 U.01 0 61 0.55 0 57 C _( 1 n lot a 11 11:1. n20 ii an 55 1:1 n:I5 0:17 0:1d 040 u 41 1151 1158 0112 0510 0 10 073 076 1)112 001 092 ` 006 i tls) o • .111 5 1111 112i 1129 (III 11311 111E 055 1118 1131 1153 04)6 076 085 0 97 1(0) 107 ` 1.1.1 1 211 I 2$, 142 151 1 6 11U9 11 1111 0:111. .i:11: t1 11 11 119 111.1 5150 011■11 0 61 II fi7 It 82 11'9:1 JIM) 111 1.26 1:31 1 43 1 541 1 65 1.78 1110: 2 02 -2 17 - -: 7 071; 9.17 1145 1152 0 1.8 061 11051 1171 070 11112 101 1.17 130 1 13 (51 165 1.73 1 81 202 2:)8 233 2.47 2 6 1: 'I d 11:11 (II t 113.1 15 1$ 5170 1)77 It W1 9 119 0 91 II 39 121 1.10 1.51 1 72 1 85 1.68 2 111 2 21 2.43 2 62 2 00 2 91-,311 ' 9 11 11 11:12 111:1 111E (582 1191 51 no 1 US 1.11 1 17 III 166 185 2113 2 19 2 35 2.42 2.112 207 3 10 3 32 ' 3 52 3 71 In 5 In 011 11111 11:i5 -1101 0117 1 011 115 122 130 137 1118 191 210 237 256 274, 2110 395 335 362 387 411 113 11 (Ito 1171 it 50 1011 1 12 1 2'1 1:12 1 11 1511 1 541 1113 2 2:1 2 50 211 2 05 3 16 3 35 9813 3.87 4.18 4 11 -171 4 99 n I : t 15 Hill it 56 1 115 1 21 136 1 41 1 61 1 72 182 192 2 35 3 72 3111 3:13 3 59 3111 4 08' 4.39 4 71 5 08 5 43 8 76 113)8 1: 11 at -114' ..1:49 1.112 105: 19d ?.14 220 :741. $ :256. :313 362: 4115 4.43-.479 ' 2 343. 1172 '027 :8.77 1'24x. 1.65 -:$159 .� ': ti 1>, 16.7: 1(9.1 i:111 I Bl 1 113' 2 15 2:10 2 51 212" 2 08 3 01 312 4 30 4 81 _6.17 5119 608 6 45 G 119 1.45 81)1 8 00 0 12 9132 5 1 :O l 21) 1 82 7 23 2 be 2 89 3153 2.11 3 G5 3 87 4 05 5 00 511 6.49 1111 7 63 8'10 8 65 0.12 - 0.09_10.79 1151- 12 24 :12 90 4%.1 22, 151 2 13 2 61 3411 3 37 3 69 302 127, 4 93' 177 5 51 615 7.56 125 8 02 9 54 19.12 10 61 1168 12 G2' 13.40 1131 ;15 08 ' •. '4-I! 25 )86 2213 9 23 373- 416 4011 493 527 559 '693 7.21 833 931 1020 1102 11.18 12`49 '1311 '1443 IS 58 I6.66 11.67. 1803 >- ' :1() 2 51 3 1.11 4:111 511:1 562 6 31 6 115 3.11 7 51 1.91. '0 74 11 25 12 57 13 97 14 80 15 UP 19 07 47.78"- 1948 -2191 22'49- 23 81) 2511. 3 1 1:11 tl 4L °' 3 'S 81 b 96 5 f.7 7 30 7 03 143' 1105 0.13 11 55 13 31 14 91 16'13 17 04 10 86 20.00 21 119 -23 10 2(05 2667' 28.2'0 '23'52 . .J . 35 3 23 -'1 57 S fdt G 16 7 23 7 92" 815 011 6 70 1022 12 52 14 46 19:16 17.10 1912 20 41 21 4)9'22 50 25 01 27111 2001 20 01. 32 >11. 2"s 1. 41l - 4110 . . 5 e t e . _ • � ,511111 9 3 9 1' 811,1- 8US 111111 111.59: 11:12: 1.110 .1?ki 15'60 1789 211 01 21 01 .21 111 `2&30 2681 2829 911 99 3340 51,71 37.911 ;9111 • I0 4111 1410 0 33 1161 11115 1 171 12 72. 12 110 i l l 12 15211 1862 21 50 2103 21133 18 11 30 10 32 24 3:199 37 23 <40.22 42 90- 15 60 48 01 d 1' MI' 801 '7°J7 9 76 18 27 12 611-13 81 11 91 15 91' '10191 11 622 21 63 25 21 20 18 30151 33:11 34 05 27,81 39 115: 43 60 47.111 55141` 55 47 ;34 30 55 Gib .0Id it 21 1296 14 18 -15417 1711 1822 '1913 21140 25 09 2801'3'239 3548 3832 4991 4345 4581 51118 54'211 5191' 61.45 01.18 .7 6112 9Gt It 011+1301 1521 `1669 1du: (928 1015 2165 , ' .•. Il.l ° � ( I ' 21,t0 91148 7P08 1731 1037-1.110 i57Z: 4819 :1279 'S7-02. 61171): Gifi0o :6815 141 737 11135 1:f0' 11111 :1031 '179'1 19_17 ' r . a r :1171 21 UG 23 IS 2d a5 177.1. 16 110 10.10 4:131 46::10 4J 1!'«1.71 DG 1) 111.2+ .G�atl 11:146 -'!]it - ` t'. t 11.7 es(4 11 31.1 t 161 1035 11131 .2,5 111 22 41; 2:191 .25 31 201 641 3 3:118:1711 42!9 411 22 49 92 53 37 S6 LO 7.11 GG GS 311 211110 75 47. 80 05 :9118 io b 93" 12 7(1 15 55„ 171116 2011 21 99 2.175 '.1.111 29 93 28 79 3177 4915 4109 49.11 52 11 1.610 Gu 23 63 48 6951 95:12 80 30' 65.17 ;89 78 7!. 9 70. 1:1211 10 91 19 511 :21 87 2411' 15117 271;0 :1911 31192 37 07 4173 40 89'53 56 57 83 Gf BS 65 610 69 16 '75.78 814412 "87:115: 9211 91 19 I'• 1 1s) III .!. :I I'I .IN'0-71 11 2:160 10 00 21')') 7'3115 31 116 33 38 10 88-17.29 5217 8781: 02 44 66 78 70:84`74 63 81.76 88 31 91.4) 1510 13 :105 55 0. t l M1"1::114 .19143 22111 2.'.11 27 Zia 29 utl 31 97 '33111 '3'5'14 4178'50 55 56 51 61 993 116 61 11.48 15 82 71102 87 65. 01`87 101 110 107.23 /1393 tat ('lit 17 tat 2.552 21111 2688 29''11 31 611' 5151(3 311111; 9001 14 bS 13 10 19.10 6581'11,11 1111 U2 8063 8199 0311 1011 57 407.51 !$103 '120.20 _ '+'.; '12 71 11'.91 2 201'.'15 41 28 41 1112 3.162 as 91 38 42".4018 4921 6682:.0353 0,959 15 11 80.36 85.23 8981' Ud 42 ,10630 11501 120,51:12700 3 t U■► 12.ls. 1159:9 '1:114: 26 72 '20 87 '32 72 9511: 31.13 40118 :42 21 Al 7 4 4914 61179 7317'79 01 8140 89 61 01 16 1113.48.11.1 11 119 48 11E73'133 39 tS11511x1 /9(1X1 :1 J (S� h.tau(.ldckttyt 111 at 1 in 4191 a/11.11100 729 1•alga 111(511,11 lm s;0 3014 • a-bl'5(atetlaer.a,• m-•..l rnl Js9nnJQQE upon ohlpe alrrpgcss I 32'1 6$ s 05I.aa1..t�sa>�•.! • < � 1 SJFJ�1:� a ' C' VALUES t4iU�.Db! F.ACT0fiS .- ,. . • Type of Mulch Land fact°or Length ? mulch. ` Rate Slope C limit= Toes per:acre Percent Feet, None' 0' oli i:0 Strove,'or hay, 1.0, 1.5 a 0 20 200. " a tied' down by 1.0 6-1 0 :20 100. anchoring land tacking 1.5° 1.5 .12 . 300° equipments 1;5 6-1:0 '97, 150 400 Z.O 6.10 06 .200 • 2.0 11-15: L .07 150 -. 24 16.20 .11'' 100 •d: • 2.0 26-33 17 50 2.0 34-50 -20 35 'Crushed atone. <16 05 200 134 +,� .to 1!n in 135 16.20 .05 150' 135 21-33 -0S 100 135 34-50 -O5 • 75 Do. 240 X21: 02 300 1. . 240 21-33 .02 200 2401 34.50 .02 150 Wood, chips 7 <16 .08 75 7 16°20 .08 50. *• Do. 12 <16 05 .150,• 12 16.20 .05 100 12 • 21.33 .05 75 Do. 25 <16 .02 ' .. 200 • -r: 2S 16.20 02 150 25 21.33 02, 100 25 34.50 .02 75 I From Meyer and Ports (24). Developed by on interagency work- shop group on the basis of field experience and limited research datat"M. aximum slope length for which the specified mulch (010.1 rote is L9 considered effective- When this limit is exceeded; either' a higher Japplication rate or mechanical shortening of the 'affective slope length is required. I 1 When the straw or hay mulch is not anchored to the. soil. G values on moderate or steep slopes of soils ,110/1,119 K values greater s ` than 0.30 should be taken at doubly the volues,given in this table t rti_ • j v 8 Cu i�.�� (OREGON) „ m TABLE 1 . 00 9s n CO • • . 85 P' 11111 90 NM F • c) ` ▪ s ,80 11101....1.1 . . 78 MI 11111111 alli analia I. -c - , . es lank 11•11111111 1110 T . 4s z . 4° 11111. 14111 M.. 111111.1 1LS sij s . s immiiii .:„_ . ., _ .. . ... .. . . 6As _ eepOO• aeoa _on 30 44'9-. ' .' I S ' - 111,11. maim 70 8 -: PERCENT' WI TERa VE E� �I®N AND RESIDUE E TIER { FIGURE INTEFRCEP'8'OR SWAL:E i t ft min. i tt rixn Level 8,3nom I ROW or Other I r tif�SS or ftodc i ' . : f/ . ii i! • .F e FIGURE` 3, LEVEL SPREADER Interceptor Berm .�--� .., -.,... .....-..'.: . :: .. : .'. : ' ' : Last zOxi of interceptor ''`, jam:-�""�� not to axceed 1°10 Grade "��'� ''r , `(1 1 - 7 tdSlop✓" • ' CtannelGrade. % Stalee r /V • ��, ? ' - ', 6w Gravel Berm Spreader Z,r t s Undsturhed Outlet , .1. r-.1'..''.... ...,,4,,,--i40---,rbr-rii; risi°• , '.r tI om-°- .. ..43L -a 'i° X991 7u/ , ''i.1,(. ..,! !.4, .t:4i,, ... 2:'1 or tletter .. T;: tip I tA e, � • ...,:,•,,,.•;:"-:!..' 6•min 1 • H C •„ i . y �^'• r psi r.r rte,:f r� e — .11:`-; v r.1 �1 ...k...1_�" i L Q '° 1 I.0..( sb1 •— .iii.1 1,' 1/i)1'p�� vi .. ita'Ei .,.,..,,,. _ _r,,,_,.....,._....,., .,...,..... ., ,,..,:,:. .,....,, ,_ . , ,,, .;; . ..'- "..,. ,::-.-,--, ._ ,,,. - • , ,. •-.,. -:. . i• - . z.S"'. .. , .,I '.` : ''' , -;-. i,j ‘.1 tili.,11 ,Ildp,o , . , _ - __ ,.. ..._ .-.. , , .... ..:_ ,,-Z-1--, --Z,.;‘)_ . s..• \-c' ,ifill,„ iiRybf. '..„,.,). - --._ •• ':-.:1":-. .,' -',.'.'-'..-,' . .,-..2,..., ,_,. ....,.._ , -,. :, . :,:.,,,, , . ,...-...,-.. .t. ,_., t, ..1 -.. . , , . ,,Tfkl, ,m-i, ,J) : ,, - - - - , .. _ ,.... .•- .._-:;:. ,,,-;,:., _ . . -- ,-. , „-.. ',.,-- ., , - -- - -- t'.)-:-e,..' '.•- - ■,,.. - - ' ,, k r . ,�. ; 613 ^t 4�3r O ��& v�-' • t '1'1'614 , ir b),,,, --- ,-- `,- -- n: ',' -'':- : , _ ' ". _ , 1\i' , II (1)1) ti j'(I. -‘ft,4,tt.,i.ii (Ptilii I, .t. c\I is.s to i ,, - ':_:-, , ':,.'::,-,,, ,'-'. -, : ''.' ' ' . . ' 44 8 4 . t Ill:°' j Iti4r° ) I s./ t 4 f1� -_--,.,-.,.' '. - _ --...,t --- -- ...,. r.,,,,...::.:,. ,_ _ ,. .:_, . _ ._ , _ . . __ a ).7 ore "'/iliii .r ''` )1��1�j, �� _ ,. ..,-_,.- _ _: ._ ,- .._,. .a. -.-- - - . . . - .� i �,� I t .:i �r ' 1111111 1 iil 11 li n dlltls t1uirm18103'1 . - ... - • - ' '' ' ''''' ,' 4 ' ' ,1 ,f: ' ' ' '' ,.,:' ' `,' ' 0 ''';� "FI URE 5', a rE SLOPE DR UNS` A C Disc.`+arge into a stabi!tzed Earth Drke w6a�terCOUrS( or a sediment «-- - •+ trapping davits or.onto a • 4 statailinerl area /` ;.• "\ i �Corrugate ipe d ?etal «�� •� �a or ADS pipe <0,1,...,,_.. 1=.4"•- • 3!. •• 7 Slope�2:1 H.D..12 . ►" <' 6D ;. . 3D t. elbows ,' �t j \ ''` Ct Stope 3°4er rt,.+4. i ,, r i yY,f:.i, 'rl Step ' ��.• . O,.i1 :otrugated 6 min ' I .+a�r;' • 4r • Cutoff Walt z ;t�. : metal Slandered(tared \ or ADS pipe �' entrance section '\;. , N\ \\\ DiameterD (for pipe? 121 ' ` RipraP Per'. .,� Depth of aprons hall be equal to pipe diameter 1.-"---1 � r s • _, 4 min.at less than 1e.slope ■ { {• .� , } k F . fie. ' � ��Y T J:a ` Trr t e a rif i.:. d k• �{t •�* ti :'...:`:.-;'''5.'"'":',!'"F-, 3 ' FtS a li ! ti ♦ ,. / !r �; .t E e j r o `` a +: r ;! �a a fi' t ,, -,.\''..-'',...._',‘,' FIGURE '6 STABILIZED C©NSTRUCTI a 6 _ ! • C i� � _. Rs?yiI •' . J a lys a.�rms�t s eoe ber i,„b§ � �,i °i° :f�. rt'�r C'Ie``� iet ® �° � t6io ds�,� �;��a_,� s d �4w � %iO l%°r ving L iR ! w Y R a 3 t t �' j f Y 1 !C .”..t '4'S L 7 C . v !}� • x 0 ' . - , PROPOSAL•'DESCRIPTION FILE No: "'") gc.„,erftf e t re 3 NP0 No:: Mt FILE TITLE: (� y�1,44e1441W7Pan` CHAIRPERSON: 4(( PHONE: . ... _, .. • . APPLICANT 0' O1 f Q. 1ER: ray' 4 - - moll---.406%,�t4- �' °' pc) ZONE: _ _.- - _ LOCATION: CA ` C� CHECK ALL WHICH APPLY: AFF DECISION � P AWNING CO(YiISSION/DATE OF. HEARING: L'1— ) �� 'PItiE: : ARINCS OFFICER /DATE OF HEARING: TIIiE: 1/ COUNCIL /DATE of HEARING: }tl�u �r I ! '�'IME s'"� j - .-' ______JZ REQUEST FOR COC**CIENNTS (SEE•AU ACHED <NO '`i3ON- aT). " DATE 'CO! 'TENTS ARE DUE BACK: CONTACT PERSON (staff): 'tJi 1, A-GTACHMME TO BE DISTRIBUTED WITH REQUEST.:OR cO MMEN�'S: ICINIT'Y MAP LANDSCAPING LAN NARRATIVE ARCNITECTU4RAL ,PLAN a. SITE PLAN ' „ PREPARE FOR PLANNER APPROVAL _(.... .....,,,,EfTER OF ACCEPTANCE OF APPLICATION.(Date accepted; ,,,i„®) ADVERTISEMENT FOR: T.T. T.T. �OREtio�IIRN '''' '' ,:, '1;':',-,' (Date) (Date '2nd hears) ,(Date) , UBLIC HEARING NOTICE TO SURROUNDING 'PROPERTY G161611`,E .7+ ,,, r f z - (Date to be mai 1ed r r NOTICE TO CO UL with what attachments:, !11Q_` ..�-- /.� � , 4 4 'S rti'. 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