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Report (11) 6400 SE LAKE RD T 503.659.9500 SURE 300 F 503.659.2227 • / , PORTLAND,OR 97222 WWYY.PACLAND.COM R RFCE Memorandum /VD JAN 13 2015 c1Ty BU OF Date: January 8, 2015 rONG SRD ROF p vO� To: Heath Wyckoff; Engineered Structures, Inc. ;L 56237 From: Shawn Nguy, P.E. 1( OREGON z. Bryan Dickerson, P.E. .�5. DEC/,. Subject: Walmart #5935-00; Tigard, OR EFF'!REs./7CV I Storm Pipe Sag/ Certification As requested, we have reviewed the Pipeline Video Reports for the onsite stormwater system prepared by Pacific Ant-R-Tek dated August 12, 2014, as provided by ESI. The reports indicated that storm pipes 6, 7, and 49 provide numerous sags, ranging from approximately %4" to over 1 " (identified as a maximum of 1-V4" by ESI). The pipes in question include: storm pipe 6 located between manholes 4 and 5, storm pipe 7 located between manholes 5 and 6, and storm pipe 49 located between manholes 53 and 55. All three pipes are designed to be 18" storm lines. Note that while the video reports indicate that pipes 6 and 7 are 15" diameter, ESI confirmed that those pipes are in fact 18" diameter per the design drawings (see attached). The design slope for storm pipes 6 and 7 was 0.46% and 0.47%, respectively. The as-built slopes as measured by Kerr construction are 0.47°/a for pipe 6, and 0.53% for pipe 7. Both as-built slopes exceed the design slope. The design slope for storm pipe 49 was 0.50%. The as-built slope measured by Kerr Construction is 0.45%. While this is slightly less than the design slope, it is within allowable limits and will still accommodate the design conveyance rate. Bellies within a storm pipe have the potential to lead to increased sediment accumulation in the bottom of the pipe. This in turn could require additional maintenance to clean the pipe to maintain adequate flows. However, in this case, even if sediment accumulated in the approximate 1-3/4" belly of the pipe, the remaining pipe section and overall pipe slope would still provide sufficient flows to convey the design storm. In addition, we understand the Walmart Construction Manager has accepted the bellies as constructed. 20 GI.- O 00?(j 76-co r -i -1.t k Yr , Page 2 of 2 Heath Wyckoff January 8, 2015 Based on the above information, it is our opinion that the storm pipes will meet the design requirements to convey the required hydraulic flow rate of the design storm event. cc: Jeffrey Diehl; Engineered Structures, Inc. Eric Evenson; Wal-Mart Stores, Inc. BD:rs Attachments tiw3hwmm0l 20-001-091 51 .' ,) i) i . 1 3 1 4 L, I I I . . i i -1 LEGEND / / \ ' . i (...........ikt..\\x.t 182 R2 . / '47.."••••• ,.‘ DOSING CONTOUR I • / 15'PORK PROPOSED CONTOUR / :>••..4:,;y0‘ =I a STANDARD STORM MAN1101./ IA / , ' 41' STANDARD aim CUT 1 11./ STANDARD CATOISASIN • / STORK WAN PIPE / / 7,1 *?..' . 10, ,11031,_ 4, ..,...„... RIP-RAP APRON . / • INTERCEPTOR DRAW --.—..-- I . . i i , it........,., , , r PERFORATED PPE INDI DA soFt. / LSIMInTei ;T • 1. • r SDI CO < POND NTERCEPTCR DRAIN--4--P.- / / I ' 1 '' 11 7, -:: . ClIDECCED N ORAN ROM MIR 10 1 MN PR3.50i '...-- \ RE1M•10 WALL PLANS ....42E.18027 .. I E 1..80...72 .I.. . ..■•=.. ••••■•■••• , $ J • (91 \•=f....--..---.--==.--..—..—.....—.. / ' / / • i I ■ i•i / . . [ . A: to .. ...,.. .__ r SD EAMON le SS XP 17756 , , 1 1 4..'‘ I / ; / . ,",°••■....;:\..... 0.. 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No. Date By Revision Description Deakined By: Issue Date: ,oto PRorcvs> IASB 3/18/13 701391PE r Drawn By: Issue: --' A i AISB/NCS OTB OREGON - C:1 15 Checked By: Project No. MM■ 6O SE LAW Road .....' 0: SN 20- 12/31/IA 001-091 SuRe 300 Portland,OR 97222 NNENS • PACIFIC INT-R-TEK PACIFIC INT-R-TEK Mobile: 503-730-4343 A Division of Scott Pipeline Video. Inc. Office: 503-665-1090 2501 NW Division St PIPELINE VIDEO REPORT Fax:503-665-1160 Gresham,OR 97030 OR CCB#146869,WA PACIFI*991CW __- Customer - Project _ Media Label -- — Kerr Walmart 9508 - Location/Street Survyor Report# _ __ _. ON SITE Kevin Odermann Upstream ID Downstream ID _ -- Camera Direction - Date Time SHEET C-2.5 NOTE 55 -• SHEET C-2.5 NOTE 53 Downstream 08-12-14_j1 4:20 PM Pipe Size _ Pipe Type Sewer Use Purpose Length TV'd 18 - HDPE Storm Ting 192 Comments Reference Ball__ ON SITE STORM — 1" Ref. Ball With Wet Lines Ftg. Code Description Position Severity Comment iifill •0.0 MH Manhole SHEET C-2.5 NOTE 55 V '46.4 G Break in Grade(Sag) 3/8 INCH OF WATER i rir °85.6 0 Break in Grade(Sag._ 3/4 INCH OF WATER tie\S._ 125.5 G Break in Grade(Sag) 3/8 INCH OF WATER - 125.8 SL Service Left 9 126.4 G Break in Grade(Sag) 1 INCH OF WATER 127.3 G Break in Grade(Sag) 1 INCH+OF WATER 132.4 G Break in Grade(Sag) 3/8 INCH OF WATER 138.2 G Break in Grade(Sag) 3/8 INCH OF WATER 138.7 G Break in Grade(Sag) 7/8 INCH OF WATER 139.6 G Break in Grade(Sag) 114 INCH OF WATER 151.8 G Break in Grade(Sag) 3/8 INCH OF WATER 153.0 G Break in Grade(Sag) 7/8 INCH OF WATER • ?,'-157.7 G Break in Grade(Sag) 3/8 INCH OF WATER - 159.8 SR Service Right 3 162.9 G Break in Grade(Sag) 3/8 INCH OF WATER °171.8 G Break in Grade(Sag) 7/8 INCH OF WATER - —173.1 G Break in Grade(Sag) 3/8 INCH OF WATER '185.3 G Break in Grade(Sag) 3/8 INCH OF WATER 187.1 G Break in Grade(Sag) 1 INCH OF WATER 187.9 G Break in Grade(Sag) IJNCH+OF WATER, 191.3 G Break in Grade(Sag) 1/4 INCH OF WATER 192.0 MH Manhole SHEET C-2.5 NOTE 53 Generated on Tuesday,8/12/2014 at 04:39 PM by the PipeTech®TV inspection system. PACIFIC INT-R-TEK PACIFIC INT-R-TEK Mobile: 503-730-4343 A Division of Scott Pipeline Video, Inc. Office: 503-665-1090 2501 NW Division St PIPELINE VIDEO REPORT Fax: 503-665-1160 Gresham,OR 97030 OR CCB# 146869,WA PACIFI'991CW Customer Project Media Label - _ Kerr_ - Waimart 9508 r--- _ _ Location/Street Surveyor Report# _ i ON SITE Kevin Odermann Upstream ID - Downstream ID Camera Direction Date' Time SHEET C-2.5 NOTE 5 J ' SHEET C-2.5 NOTE 4 . Downstrea t 08-12-14-11 2:30 PM Pipe Size Pipe Type _ Sewer Use (,Purpose Length TV'd 15 � ! HDPE __-J Storm .Testing 142 _ Comments Reference Ball ON SITE STORM i_ 1" Ref. Ball With Wet Lines Ftg. Code Description Position Severity Comment 0.0 h1H Manhole SHEET C-2.5 NOTE 5 1( 40.2 G Break in Grade(Sag) 114 INCH OF WATER 54.8 G Break in Grade(Sag) 3/8 INCH OF WATER - 62.2 G Break in Grade(Sag) 1/4 INCH OF WATER 71.1 G Break in Grade(Sag) 1 INCH OF WATER 73.4 G Break in Grade(Sag) 1 INCH+OF WgIFR V 82.5 G Break in Grade(Sag) 1/4 INCH OF WATER 85.5 G Break in Grade(Sag) 1 INCH OF WATER 88.1 G Break in Grade(Sag) 1 It _E +nF I T R 108.0 G Break in Grade(Sag) 3/8 INCH OF WATER 111.6 G Break in Grade(Sag) 1 INCH OF WATER 113.4 G Break in Grade(Sag) 1 INCH+OF WATER 117.5 G Break in Grade(Sag) 3/8 INCH OF WATER =119.4 G Break in Grade(Sag) 1 INCH OF WATER 121.0 G Break in Grade(Sag) 1 ttA(`.H+r■F WATER 129.8 G Break in Grade(Sag) 3/8 INCH OF WATER 142.0 MH Manhole SHEET C-2.5 NOTE 4 Generated on Tuesday,8/12/2014 at 03:35 PM by the PipeTech®TV inspection system. PACIFIC INT-R-TEK PACIFIC INT-R-TEK Mobile: 503-730-4343 A Division of Scott Pipeline Video, Inc. Office: 503-665-1090 2501 NW Division St PIPELINE VIDEO REPORT Fax: 503-665-1160 Gresham.OR 97030 OR CCB#146869.WA PACIFI*991CW Customer Project Media Label Kerr — _ —_-- -- -- Walmart 9508 _ Location/Street Surveyor Report# ON SITE Kevin Odermann —_. _ Upstream ID Downstream ID _ Camera Direction Date Time SHEET C-2.5 NOTE 6 ] 1 SHEET C-2.5 NOTE 5 r Downstream 08-12-14 _II_ 3:15 PM Pipe Size Pipe Type Sewer Use Purpose __ Length TV_'d _ ) 15 _ _HDPE . Storm Testing_ 70 Comments ____ __ Reference Ball j ___- ON SITE STORM 1"Ref. Ball With Wet Lines ! Ag. Code Description Position Severity Comment •0.0 MH Manhole SHEET C-2.5 NOTE 6 ink 6.5 G Break in Grade(Sag) 1/2 INCH OF WATER 8.6 G Break in Grade(Sag) 1 INCH OF WATER 10.5 G Break in Grade(Sag) 1 INCH +OF WATER 1 trc ,. ',." :.,,) .-.' --''1" ' 17 35.4 G Break in Grade(Sag) 5/8 INCH OF WATER Pi V 39.5 G Break in Grade(Sag) 1 INCH OF WATER 45.9 G Break in Grade(Sag) 3/8 INCH OF WATER 3 51.8 G Break in Grade(Sag) 7/8 INCH OF WATER 53.7 G Break in Grade(Sag) 1 INCH OF WATER 55.4 G Break in Grade(Sag) 1 INCH+OF WATER 58.5 G Break in Grade(Sag) 3/8 INCH OF WATER °70.0 MH Manhole SHEET C-2.5 NOTE 5 Generated on Tuesday,8/12/2014 at 03:30 PM by the PipeTech®TV inspection system. Bryan Dickerson From: Tyson Corcoran <tcorcoran @KERRCONTRACTORS.COM> Sent: Wednesday, December 31, 2014 10:13 AM To: Shawn Nguy; Matthew Pierce; Heath Wyckoff; Bryan Dickerson Cc: Eric Evenson (Eric.Evenson @walmart.com); Jeffrey Diehl; Eric Jeter Subject: RE:WM 5935 Tigard - Storm water pipe flow certifications of concern Shawn, The grade differential between manholes 53 and 55 is 0.87'. Tyson Corcoran Kerr Contractors tcorcoran @kerrcontractors.com 503-504-9055 From: Shawn Nguy [mailto:snguy @pacland.com] Sent: Tuesday, December 30, 2014 10:27 AM To: Matthew Pierce; Heath Wyckoff; Bryan Dickerson; Tyson Corcoran Cc: Eric Evenson (Eric.Evenson @walmart.com); Jeffrey Diehl; Eric Jeter Subject: RE: WM 5935 Tigard - Storm water pipe flow certifications of concern Matthew/Health — The map provided also showed sags in the pipe between MH 53 and 55. Please provide the grade differential between these two manholes as well. 0 le •,,k ilcz,k -1•o•111•111111=1 ■.aaaa. as �--� 6- STN co 18 SD (174.66 Rik 179.60 6' SS TOP 17132 Ii:: 175.28 ! Shawn Nguy, P.E. PACLAND Engineering&Development Consulting Services 1 6400 SE Lake Rd,Suite 300 I Portland,OR 97222 Office:(503)659-9500 x1318 I Fax:(503)659-2227 From: Matthew Pierce [mailto:mpierce(TKERRCONTRACTORS.COM] Sent: Wednesday, December 24, 2014 9:31 AM To: Heath Wyckoff; Bryan Dickerson; Shawn Nguy;Tyson Corcoran Cc: Jeffrey Diehl; Eric Jeter Subject: RE: WM 5935 Tigard - Storm water pipe flow certifications of concern Good morning. We set up a rotary laser and shot the in/out elevations on manholes 4,5, and 6. Between manholes 4 and 5 there is .66' of grade differential at the ie.'s. There is .38' of fall between manholes 5 and 6. The design plans list these as .67'and .33' respectively. We didn't have a good point to use for a bench mark, so I dont have actual elevations. We could have used the slab of retail 2, but the parking lot was crowded, and we would have had to transfer grades several times. Let me know if this works,thanks. Sent from my Verizon Wireless 4G LTE Tablet Original message From: Heath Wyckoff<HeathWyckoff @,esiconstruction.com> Date: 12/24/2014 8:02 AM(GMT-08:00) To: Bryan Dickerson<bdickerson@pacland.com>,Shawn Nguy <snguy@pacland.com>,Tyson Corcoran <tcorcoran@KERRCONTRACTORS.COM>,Matthew Pierce <mpierce @KERRCONTRACTORS.COM> Cc: Jeffrey Diehl<jeffreydiehl @esiconstruction.com>,Eric Jeter<eieter(&,pacland.com> Subject: RE: WM 5935 Tigard- Storm water pipe flow certifications of concern Matt,Tyson Russell called me yesterday and told me he had the I.E numbers, please get this information to Pacland ASAP so we can get this last issue resolved and get C of 0. Thank you in advance Heath Wyckoff (208)401-8332 heathwyckoff @esiconstruction.com From: Heath Wyckoff Sent: Monday, December 22, 2014 10:34 AM To:'Bryan Dickerson';Shawn Nguy; 'Tyson Corcoran'; Matthew Pierce Cc:Jeffrey Diehl; Eric Evenson; Eric Jeter Subject: RE: WM 5935 Tigard-Storm water pipe flow certifications of concern Tyson, Matt Please see email below, and please provide the requested elevations. 2 Thank you in advance Heath Wyckoff (208)401-8332 heathwyckoff @esiconstruction.com From: Bryan Dickerson [mailto:bdickerson @pacland.com] Sent: Monday, December 22, 2014 10:30 AM To: Heath Wyckoff; Shawn Nguy Cc:Jeffrey Diehl; Eric Evenson; Eric Jeter Subject: RE: WM 5935 Tigard -Storm water pipe flow certifications of concern Heath —did you shoot as-built elevations for the pipe inverts at the manholes for the pipes in question? Given the depth of standing water in some of the sag sections, it would be good to confirm the overall pipe slope. Let me know if you can provide that. Thanks, Bryan Dickerson, P.E. PAC LAND Engineering&Development Consulting Services 6400 SE Lake Rd,Suite 300 I Portland.OR 97222 Office.(503)659-9500 x1314 I Fax:(503)659-2227 From: Heath Wyckoff[mailto:HeathWyckoff @esiconstruction.com] Sent: Monday, December 22, 2014 9:23 AM To: Bryan Dickerson; Shawn Nguy Cc:Jeffrey Diehl; Eric Evenson; Eric Jeter Subject: RE: WM 5935 Tigard -Storm water pipe flow certifications of concern Bryan, Thank you,just to let you know until this issue is resolved we won't be able to get C of 0.. Thank you in advance Heath Wyckoff (208)401-8332 heathwyckoff @esiconstruction.com From: Bryan Dickerson [mailto:bdickerson @ pacland.com] Sent: Monday, December 22, 2014 9:20 AM To: Heath Wyckoff; Shawn Nguy Cc:Jeffrey Diehl; Eric Evenson; Eric Jeter Subject: RE: WM 5935 Tigard -Storm water pipe flow certifications of concern Heath — I received the files you sent and will take a look at them to confirm everything looks okay. I'll try to get back to you on this later today. 3 Thanks, Bryan Dickerson, P.E. PACLAND Engineering S Development Consulting Services 6400 SE Lake Rd,Suite 300 I Portland,OR 97222 Office:(503)659-9500 x1314 I Fax:(503)659-2227 From: Heath Wyckoff[mailto:HeathWyckoff @esiconstruction.com] Sent: Monday, December 22, 2014 8:44 AM To: Bryan Dickerson;Shawn Nguy Cc:Jeffrey Diehl; Eric Evenson Subject: FW: WM 5935 Tigard-Storm water pipe flow certifications of concern Pacland, Here is the email that the city is requesting the wet stamp. Thank you in advance Heath Wyckoff (208)401-8332 heathwvckoff @esiconstruction.com From:Jeffrey Diehl [mailto:leffreydiehl @esiconstruction.com] Sent:Tuesday,September 16, 2014 3:33 PM To:Joel Jenson;Tyson Corcoran Subject: FW: WM 5935 Tigard -Storm water pipe flow certifications of concern FYI. Jeffrey Diehl Senior Project Manager Engineered Structures, Inc. 3330 East Louise Drive, Suite 300 Meridian, ID 83642 (208) 362-3040 Office (208) 362-3113 Fax "Experience...Service...lntegrity!" From: Eric Evenson [mailto:Eric.Evenson@walmart.com] Sent:Tuesday, September 16, 2014 4:25 PM To:Jeffrey Diehl Cc:Guy McLain Subject: RE:WM 5935 Tigard-Storm water pipe flow certifications of concern Jeffery 4 This is not outside of acceptable tolerances and I will accept this as is. Eric From: Jeffrey Diehl [mailto:jeffreydiehl @esiconstruction.com] Sent: Tuesday, September 16, 2014 10:48 AM To: Eric Evenson Cc: Jeffrey Diehl; Guy McLain Subject: WM 5935 Tigard - Storm water pipe flow certifications of concern Eric, Per our conversation today, attached is a map of the onsite storm water pipe system. Per the attached certification reports,there are a couple of portions noted on the map that exceed the allowable 1"sag by approximately 1/8"to '/<". As we discussed, it is not expected this deflection will in any way compromise the functionality of the system. We are prepared to make these repairs but it will require cutting into the asphalt. Given the quality of the asphalt paving, the minimal deflection may not be enough of a concern to justify creating asphalt patches in the new parking lot. Please review and let me know how you would like us to proceed. Thanks. Jeffrey Diehl Senior Project Manager Engineered Structures, Inc. 3330 East Louise Drive, Suite 300 Meridian, ID 83642 (208) 362-3040 Office (208) 362-3113 Fax "Experience...Service...Integrity!" This email and any files transmitted with it are confidential and intended solely for the individual or entity to whom they are addressed. If you have received this email in error destroy it immediately. *** Walmart Confidential *** !SIG:5498634519115372248344! 5 CONFIRMATION OF 18" PIPE DIAMETER AT MANHOLE 6 .5 .fir 41,A 1,, t ! ' r 1 • f• �•� • C-r 41 • • d MCI% r .. • RECEIVED JAN 13 2015 CITY OF BUILDING DIVISRD ON