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08/08/1972 - Packet TIGARDWATER DISTRICT 8841 S. W. COMMERCIAL ST. TIGARD, OREGON 97223 PHONE (503) 639-1554 August 8, 1972 AGENDA GILL TO ORDER 1. RESOLUTION TO APPROVE MINUTES OF LAST MEETING 2. VISITORS 3. RESOLUTION TO PAY VOUCHERS 4. RESOLUTION TO APPROVE REVISED RULES, RATES, AND REGULATIONS 5. RESOLUTION TO PARTICIPATE WITH PROGRESS AND METZGER WATER I`'' DISTRICTS AND W:INMAR INC. IN CC6T TO INSTALL 24—INCH MAIN TO BRADLEY CORNER. ($43,000) 6. RESOLUTION TO INSTALL 16—INCH D. I. MAIN FRO(( BRADLEY CORNER TO INTERSECTION OF TIGAR.D AND TIEDEMAN STREETS. ($100,000) 7. RESOLUTION TO INSTALL 16—INCH D. I. MAIN FROM WALUGA RESERVOIR (LAKE OSWE)GO) TO HALL BOULEVARD. ($165,000) 8. RESOLUTION TO PURCHASE 3.2 ACHES OF LAND FOR TERMINAL RESERVOIR SITE AT 125TH AND GAARDE ON A CONDITIONAL BASIS FROM MR. BEN LARSON. ($18,x) 9. OTHER BUSINESS ADJOURNMENT ADMINISTRATOR'S REPORT 1. Resolution to approve minutes of last meeting. 2. Visitors. A representative from Tualatin Development Company is scheduled to appear before the Board to request annexation for the property on S. W. 109th, near Durham Road. This is the location of the 1st 50 units that the district agreed to serve. 3. Resolution to pay vouchers. 4. Resolution to approve revised rules. rates. and regulations. 5. Resolution to participate with Progress and Metzger Water Districts and Winmar. Inc. in cost to install 4-inch main to Bradley Corner. ($43.000) Time for decision. Much has happened this past month which should materially assist you in making the best possible decision on future water sources. All of the facts are now available and the Board should make several critical decisions on the short and long range goals of the district and how these goals should be implemented. It was mentioned at the last meeting that a possible interim solution to an alternate source of water would be to install smaller mains to both Portland and Lake Oswego directly into the distribution system. This idea appeared to have considerable merit so Gil Meigs, SUR, was requested to re-examine the distribution system with a network analysis to determine its capability to accept water in this manner. His conclusions and recommenda- tions are enclosed. He cannot attend the meeting, but his associate, Don Wright, will be present to explain the results. -1- .A IINISTRATCR'S nrrudtir (Continued) The City of Lake Oswego requested CH214 to submit a report on the feasibility of providing surplus water to Tigard Water District. The report is attached hereto. The terminal reservoir concept as defined in the ST&R Study has been generally accepted by the Board as the long range solution for Tigard Water District. This concept envisions two 5-million gallon reservoirs at elevation 450-feet which would feed the existing reservoirs in the system at elevation 410-feet. The terminal reservoir would be supplied from major transmission mains from either Bull Run or Clackamas River. (and possibly Willamette River or Scoggins Dam). The terminal reservoir concept was devised because the existing system was, by necessity, constructed around well sites at different locations throughout the system. In order to take advantage of the existing distribution network it was recommended that the terminal reser- voirs be constructed higher than the other reservoirs. This necessitated the construction of a high-pressure transmission main to the terminal Any reservoir, independent of the distribution system. With one or more direct connections into the distribution system, the construction of terminal reservoirs and transmission mains thereto can be deferred for at least 10 years; however, the concept is still valid and must be implemented at some future date. On July 20th I met with representatives from CRAG who advised that the grant application, as submitted, would not be approved by HUD. This was so because the purchase of water via Lake Oswego was not in accordance with any master water plan. The CRAG master plan provides for eastern Washington County to be served by Bull Run. The Washington County plan provides water service to Tigard via the Willamette River at Wilsonville. It was suggested that an interim solution be found until a revised accepted master plan can be devised. The Oregon State Clearinghouse stated essentially the same thing. (see enclosed letter). In view of the above, the FUD grant idea should be abandoned for the immediate future. -2- ADMINISTRATOR'S REPORT (Continued) It is true that the Tigard Water District has been plagued for many years with water shortages and restrictions during the summer months. However, it appears that, this year for the first time, the district will have sufficient water with no restrictions. This was due to the commissioners making the correct decisions and our own efforts to make the existing system function properly. This is the year the water district "caught up" with demand and now must make further improve- ments to ensure an adequate supply for anticipated growth, to obtain flexibility, and to lower user rates. The district is, indeed, in an enviable position to have several options available to decide from whom to purchase water. (You can be assured that both Portland and Lake Oswego are eager to serve the dis- trict). Certainly, the district is in a better position than those other eastern Washington County water districts who are "tied" to the Bull Run system and have no alternatives but to accept the price, quality, and service of the Portland Bureau of Water Works. At a recent meeting with representatives of Portland, Metzger, '+m° Progress, and Winmar, the transmission main from Portland to Bradley Corner was discussed. Elden Carter presented cost estimates for differ- ent sized mains. (See enclosed estimates). Winmar has agreed to pay $85,000 toward the main installation. If it is to be a 24-inch main, Progress has offered 10% while Metzger has committed 15%. If Tigard participates, the cost would be 25% or about $43,000. The other participants requested that a decision be forthcoming by August 9th so that construction can proceed. Gil Meigs believes that the main should be 24-inch from his calcu- lations. This is due, primarily, to the fact that there will be no "take-offs" from this main within this span. Metzger, Progress, and Tigard plan to set meters at Bradley Corner; therefore, the main should not be reduced in size until that point. Further, if Tigard desires adequate flows, it should be a 24-inch main. Mr. Hyle was asked the $64,000 question whether Portland would allow Tigard to connect to a main size less than 24-inch. He responded that with the projected growth in that area he did not believe Portland could adequately serve Tigard from anything less than a 24-inch main. According- ly, he indicated that Tigard would not be served with a smaller main. -3- ADMINISTRATOR'S REPORT (Continued) 6. Resolution to install 16-inch D.I. main from Bradley- Corner to intersection of Tigard and Tiedeman Streets. ($100.000) Obviously, a resolution to this effect is contingent upon approval of paragraph 5 above. Gil. Meigs' letter considers a very important restriction on receiving water into the distribution system. A large volume of incoming water will increase the pressure in the system. He has established 20 psi as the maximum allowable increase. His computa- tions indicate that at least a 14-inch main should be installed to be able to receive 3.3 mgd. A point to be made here is that it is not whether Portland can provide sufficient water, but at what rate Tigard can accept it. A smaller main would reduce flows significantly. Since the installation of a 14-inch main is within the capability of TWD personnel it would be preferable to install the maximum size possible. By utilizing ductile iron pipe which is lighter and stronger, district personnel are capable of handling 16-inch pipe. This increase in size would allow for possible future "take-offs" between Bradley Cor- ner and Tiedeman. 411110, The length of this pipe line would be 6800 feet. It is 1000 feet longer than originally planned because it must be installed to the intersection of Tigard and Tiedeman. Utilizing TWD personnel and engineering, the cost is estimated as follows: 6800' of 16" D.I. pipe @ $12/ft = $ 82,000 Boring under Beav-Tigard freeway = 5,000 Boring under railroad tracks = 3,000 10" x 12" master meter + vault = 10,000 Total: $100.000 Gil Meigs' estimate was $120,000 for 14" pipe. In accordance with your resolution of last meeting this main should be installed immediately. -4- w.. ADMINISTRATOR'S REPORT (Continued) 7. Resolution to install 16—inch D.I. mein from Walusa reservoir (Lake Oswego) to Hall Boulevard. ($165.000) Enclosed is a letter from Mr. Seeger, City Manager of Lake Oswego, regarding selling of surplus water to Tigard. Attached to his letter is an enclosure prepared by CH2M. In view of the water available at Lake Oswego, the CH2M estimate of only 2mgd of surplus water is believed extremely conservative. However, the 2 mgd would meet the needs of the district for many years with a high quality, inexpensive source for everyday use when and if the wells go dry. The Portland source could still serve the "peaking" requirements as necessary. While the construction crew is "in gear" a 16—inch main should be installed to Lake Oswego also. This would provide the district with a "cheap" source, and most of all, provide for flexibility. A cost estimate is as follows: +•� 10,500' of 16" D.I. pipe @ $12/ft = $126,000 Boring under I-5 5,000 Crossing Fenno Creek = 4,000 Pump station = 30,000 Total: $165, 000 Gil Meigs' estimate was $225,000 for 14" pipe. This project could be accomplished next summer. 8. Resolution to purchase 3.2 acres of land for terminal reservoir site at 225th and Gaarde on a conditional basis from Mr. Ben Larson ($18.400) The appraised value of the Ames property is $21,000 while Ames is asking $50,000. Rather than pursue that course of action I explored the area for other satisfactory sites. Mr. Ben Larson has expressed a willingness to sell some of his property for a reservoir site. The attached maps show the area and a profile. He is asking $20,000, but I believe the property is worth only $18,000. —5— +r► ADMINISTRATOR'S REP(BT (Continued) The site plan was referred to Gil Meigs for approval. Although the reservoirs will be constructed at the 470-foot elevation level in lieu of 450-foot mark, he concurred that the site was adequate. According to Gil Meigs the terminal reservoir concept is still valid and should be planned for in the future (about 10 years). It would be worthwhile to have the established site available for con- struction. I suggest a counter-offer of $18,000. 9. Other business. a. Raise elevation of #3 reservoir Over the years the Board of Commissioners has approved construction *ow of several reservoirs in excess of usual needs because of the source deficiency. There was no other solution. Normally, a water district should have on hand 3 days average consumption. In our case that would be about 3i-million gallons of storage. 7 million gallons of storage are on hand. If both of the connections, as noted above, are approved, there is no need to expend funds for another 1-million gallon reservoir at #3 (Burge property) at this time. In discussing this with Gil Meigs, he recommended that the present reservoir at #3 be raised the required 12 feet so that it would become a usable asset and also to gain the additional 0.3 million gallons of storage. b. Water loss Several commissioners have commented about the statistics on water supplied versus water consumption. It is difficult to make a comparison in the report as submitted to you monthly. This is so because water pumped and purchased is totalled monthly while water consumption is shown for the customers for a 2-month period. These two figures may or may not be indicative of the water lost during the month. A comparison is made annually to arrive at a true figure of the water lost. Last year the figure was 3 while this year it was reduced to 20%. This is still too high. About l0can be accounted for by flushing lines and fire hydrant usage. The remaining 10% is probably from leaks. It is i'"" believed that some losses occur on the 12" fire main located on 72nd Ave. which is not now under our control. Also, by increasing the pressure -6- *ow ADMINISTRATOR'S REPT (Continued) by 20 psi from the new pump station causes more leaks in the old mains. A continued effort will be made to reduce this loss of water. The $43,000 budgeted this year to replace old mains will help. c. Future construction plans If the projects outlined above materiaii%e, the district can plan on terminating the extensive construction program as now being performed by TWD personnel. Within 2 years the district can have several dependable sources of water available, ample storage, and a distribution system fully capable of serving the customers. The TWD will be "second to none" in all categories. It is believed that the district will not need an engineer on the staff and those services should be terminated. -- On to new challenges. d. Reduction in user rates The cost to purchase Bull Run water last month via Capitol Highway Water District was $15,842. If water had been purchased via Bradley Corner the cost would have been about $10,000 while Lake Oswego water mould have cost about $5,000. Enclosed is a list of customers who had water bills in excess of $30. The cost is horrible and an effort should be made to reduce rates by next summer. If cheaper water can be purchased by next summer, either via Portland or Lake Oswego(or both), I believe that the district can reduce rates on a limited basis. As a starter it would be desirable to utilize summer rates as some water districts do. The customers do not complain about higher rates in the winter since consumption is low. Sumner rates prove advantages to the single family home owner who takes care of his lawn and shrubbery. In a negative way it makes the apartment owners bear a larger share of the total burden because their consumption rate is rela— tively constant throughout the year. e. Water to Tigard High School Construction of the 12" pipe line for Tigard High School has commenced. Completion is scheduled by Labor Day, prior to the start of school. This project represents about lfr years of effort by the School Board and the water district. It will be a very worthwhile addition to the community. -7- A1tIldISTR Tat'S RSPa T (Continued) f. Work accomplished during July (1) TWD completed "tie-ins" of 12" D.I. pipe crossings on Pacific Highway at Greenburg Road. (Bond Construction) (2) TW!) installed 380 feet of 6" C.I. plus 3 fire hydrants along 112th Avenue, south of Gaarde, for Culver Construction Co. where 92 apartment units are being constructed. (Developer's) (3) TWD installed 270 feet of 8" C.I. plus a fire hydrant on Sunrise Lane, west of 150th Avenue, for 2 single family dwellings; W. Younger and Mr. Neu. (Developer's) (4) TWD installed 2 fire hydrants on Karen Street, near 127th Avenue, for Mr. Montgomery who is constructing 33 units. (Developer's) (5) Kearney Bros. installed 1170 feet of 8" D.I., 2100' of 6" C.I. and 270' of 4" D.I. plus 4 fire hydrants for Mr. Dale DeHarport's development of 33 single family units on 164th and Bull Mountain Road, west of West Colony Park. (Developer's) (6) Installed 28 meters. (3665 - 3692) g. Work to be accomplished during August (1) TWD install 3500 feet of 12" C.I. plus 6 fire hydrants along Durham Road, between 79th and 92nd Avenues, for School District *23J. (Developer's and Pipe Extension) law -8- s Stevens, Thompson & Runyan, Inc. Engineers / Planners 5505 S.E. MILWAUKIE AVE. • BOX 02201 • PORTLAND, ORE. 97202 • TELEPHONE (503) 234-0721 1920 Portland Seattle Boise Anchorage P-815. 004 July 17, 1972 Mr. Bob Santee, Superintendent Tigard Water District 8841 S. W. Commercial Tigard, Oregon 97223 Re: Additional Network Studies Dear Bob: To confirm our discussions of July 13, we are writing an outline of the network analyses to be performed for you. A network analysis of the existing water system is to be undertaken with two alternate supply sources feeding into the reservoir system through the distribution system. One of the alternate sources is at Greenberg Road at the intersection with Dakota Street. The other source is at Bonita Road near Fanno Creek. Each source would be analyzed alone. The purpose of the investigation is to determine the adequacy of the existing water distribution system to transmit water from these sources into the reservoir system that is now in operation. In addition to this work, we are to investigate the pipeline being pro- posed from S. W. Multnomah Boulevard at the county line to Bradley's corner in an extension of this line from Bradley 's corner to S. W. Dakota Street. For performing these services together with a brief written report accompanied by marked-up copies of Plate 4 of the Water Supply and Distribution Study, we propose to charge on the basis of our direct payroll times a factor of 2. 54. Out-of-pocket costs will be billed to Stevens,Thompson 8L Runyan,Inc. Engineers/Planners Mr. Bob Santee -2- July 17, 1972 4410, you on the basis of our cost, and mileage involved with the project will be charged at the rate of 12 cents per mile. We hope to be able to use as much of the programing developed for the original water study as is possible for this additional work. Thank you for this opportunity to again be of service to the Water District. Very truly yours, STEVENS, THOMPSON & RUNYAN, INC. A . fir a. t. . Gilbert R. Meigs J Vice President G RM:1p t i L .G9teve%1s, r1 ho 11Tosiorl esi II7,C. Engineers l Planners >._ E33.5 S.E. MILWACK E A:E. • BOX 02201 • PORTLAND, ORE. 97232 • TELEPHONE (503) 234-0721 1920 t'jrtland Seattle Eloise Anchorage 004 August 3, 1972 Thea/ c} .Vater District �t 11 S. W. Commercial T i :s rd, Oregon 0722-1i .`\!teniinn: Mr. Robert Santee Re: Interim Supply Dea r Mr. Santee: Pursuant to your request , we have analyzed the distribution system under projected 197"i physical conditions to determine its capability '441w ) transmit water purchased from either or both the City of Portland and the City of Lake Oswego. The results of this analysis tonether with brief analysis of the interim supply systems is reported herein. We have assumed two pressure increment, 10 psi or 20 psi above present static values, at the points of connection for these supplies. V„r Portland 1 hr connection would he at Tigard Street and Ti 'dermrta n 1;o:id where three lines branch. The I ?-inch on Latherine, Tigard, and Main Street was. added, Out the analysis shoved it not vital. For Lake Oswego the connection would he at l-Tall Boulevard at Bonita Road. lt pecans(' evident immediately that hall would have to have a main north to 0mllara as well as an0110r 12-inch from B rnham t;r 1Tunril:er. For both situations, the proposed 12-inch on Ilighuay '0 from Beef Bend to Canterbury Lane was found to be desirable. Under those conditions of improved pipe network the followire flus' s can he received from the two sources: c's c.irti. FhoInjstion d`: Runyan,in<•- �nurrs. P,�,innr•rti Tigard Water District -2- August 3, 1972 411Ilrr Source + 10 psi + 20 psi City of Portland 2. 2 mgd 3. 3 mgd City of Lake Oswego 3. 2 mgd 4. 1 mgd Combined, acting simultaneously 5. 0 mgd 6. 1 mgd Note: mgd = million gallons per clay The 2. 2 mgd flow would be adequate for peaks until 1975, while the 6. 1 mgd flow would he adequ to for peaks until 1985. These projec- tions wore in our 1071 repor and they ars' based on 1 . 1 n L,rl from voiir present wells. Ilig,her flows from external sources will result in even hil',l r res. You should anticipate that there will he limes when the ws ,ire near to zero. When this occurs, the entire distribution system, rather than only the point of connection, will feel the effect of the increased pressure. So far as other effects of these ties on the distribution and storage system are concerned, we can make these observations. 1 . The terminal reservoir concept is still valid, and the reser- voir and pipeline to it will be needed when demands exceed allowable pressure increases. -Baylor Reservoir will he a problem until another line is built to it . It is less of a problem with water supplied from Oswego. The 12-inch line on S. W. 72nd could he used as a tie to Baylor (and even to Metzger) if water conies from Oswego. 3, Reservoir No. 4 will be a problem until lines along Durham and Satter are built. Then, Oswego would do a better job of filling than Portland. 4. Altitude valves will have to he working on all reservoirs. Some reservoirs will not fill unless others are f1111. tiac'v t'i .rrhOlnapinif 8: ntarayitn,inc. i hmwoi;/P/;inners Tigard Water District -3- August 3, 1972 5. Connecting to Lake Cfswego requi res work on Hall Boulevard. Connecting to Portland requires no work in addition to your scheduled work for the ne: t year although the Katherine, Ti ga fud, and Main Stu ect work is desirable if Baylor is to fill rapidly after Reservoir No. I is full. Connecting to either requires work on Ifi!;h vay '39 between Beef Bend Road and Canterbury Lane. The connection to Bradley Corner should be through a 14-inch lire, and is 6, 800 feet long. The line from Portland to Bradley Corner should be a 24-inch pipe. From Lake Oswego at Waluga, a [4-inch is needed, but it is 10, 500 feet long. The Lake Oswego supply would red a pumping station, say ai S. W. 72nd and Bonita. Both systems ould require master meters and pressure regulating si;ctieuus. e lin>ale notes'• Mr. laden Carter 's figure; for pipelines as an eslini !ting basis, that the following total costs would be involved: To connect to Bradley Corner $120, 000 Share of 24-inch line 43, 000 Total 51 ( 3, 000 *lrrw To connect to Waluga Reservoir Total $223, -)(10 llsint the criteria of the Master Plan for the Tigard Water District ISTP , 1 '1711, the total cost per year to the District for one million r 11un:; 1>er day average annual purchase would be 'j; l ' , 00I) for I 'ortl"cnd water and $90, 500 for Lake Os«•>ego's water. Need for a steady supplemental flow of this magnitude is anticipated to be five or Si`. years away. From the foregoing initial and average annual costs, it is seen that the Portland source will he less expensive as long as the use of pur- chased water is quite modest. The reason is the 11 (,' per 100 c. f. di£fere ice in favor of water purchased from the City of Lake Oswego, but I,a e Oswego may not be interested in selling peak-demand water, while 'outland is. �w" `'it.(s •C`n«:.'ThonJ)-o1 & Ctur!ya 1,Inc. ,ninrr,s r'.inners Tigard Water District -4- August ', 197?_. Evcn i f i he District should participate with $4"),, 000 for the. "?..1 -inch line 90 Bradley Corner. and not connect. to Bradley Corner, but t'ntua l ly ini Id the 14-inch line to Lake Oswego, the resultint; annual -cist It ,ate 5iiillittn allttnr. per day is less than bttyiip from Pori-land. 1\',i dcdi;tr value can be assigned irons our analysis to a two-source feed, ,tit the advantages of int erties must not be overlooked. We recognize that all the uncertainties cannot be resolved nor can lh illy cosi s l,c, hno n at Ili tin n. We can say it is practical to aline, supplemental water cit re ci ly ml i) the distribution sy :teni as an s atet irit nteat;ure. 11 is our opinion that the District should partici - in a A'.=1-inch line to Bradley Corner. The si! tiaiion l'et'.i i'dui1' Ietici Ofi\','ern tltoul(I he kept. open ,till 'iron h tticl continue, especially Io see wIlal the conditions o1 rutty would lie for peak and :aVerat;e Cloivr,. Very truly yours, STEVENS, TIHOMPSON R, RUNYAN, INC;. a t '✓ •/ ^ ! ' 'VTC® osol Gilbert H. Meigs Vice President 1 ,� PPM:]It *04.06 City of Lake Oswego May 22, 1972 Mr. Robert E. Santee, Administrator Tigard Water District 8841 S. W. Commercial Street Tigard, Oregon 97223 Dear Mr. Santee: I am pleased to acknowledge your letter of 16 May concern- ing your District's interest in the purchase of surplus domestic water from the City of Lake Oswego. While the City is prepared to negotiate the sale of sur- plus water, as previously indicated, we feel that the question of providing service solely for the purpose of meeting peak demands on your system must be given careful consideration. As was pointed out in earlier reports by CH2M, the present capacity of our system is more than sufficient to provide 3-5 mgd `Ilor for outside users. The revenues derived would assist the funding of phased expansion to our supply system. If our outside connections pro- vided peak demand supply only we would, in a sense, be committing future capacity without the benefit of meaningful interim income. I am requesting Mr. De Haas to contact CH2M for further study of this proposal and will keep you advised. Sincerely, ,Zr-r-/1 Deane Seeger City Manager DS:hb cc: M. De Haas, D.P.W. EXHIBIT "D" City Hall • 40 A. Avenue • Lake Oswego, Oregon 97034 • Telephone - 636-3603 City of Lake Oswego w August 3, 1972 The Board of Commissioners Tigard Water District 8841 S. W. Commercial Street Tigard, Oregon 97223 Attention: Robert E. Santee, Administrator Gentlemen: In response to the City's request, CH2M has submitted a supplemental report on the feasibility of providing surplus water to the Tigard Water District. Copies of their letter dated 2 August, 1972, together with population and water use projections are enclosed herewith. I have also included a report submitted by __ CH2M dated 31 March, 1970, relating to these matters. I trust that this material will assist your Board in its deliberations. We will await further word from you as to your findings and/or proposals. Sincerely, ,Z1// Deane Seeger City Manager DS:hb Encl. City Hall • 348 N. State Street • Lake Oswego, Oregon 97034 • Telephone — 636-3601 N 7 3 "' ` CDRNELI,HDWIAND,HAYES& NIERRYFtELD , :r_-L . 1600 S.W.Fourth Avenue,Portland,Oregon 97201,Telephone:503/224-9190 Portland Regional Office 2 August 1972 P6974 .0 ENGINEERS PLANNERS ECONOMISTS t,1 • 1 � City of Lake Oswego •,Y `o: 40 A Avenue i C:3"' Lake Oswego, Oregon 97034 .,�' Attention: Marlin DeHaas , Director of Public Works Gentlemen: Subject: Sale of Surplus Water to Tigard Water District In reply to your letter of June 6 , 1972 , we recommend that you contract for sale of your surplus domestic water to the Tigard Water District subject to the following conditions : 1. Firm water deliveries will be limited to a maximum of two million gallons per day. 2. Water deliveries can be made from the end of your 24-inch water main (or its extension) in the vicinity of Waluga Park at a hydraulic gradient of 300 feet above mean sea level. 3. The term of the 2 million gallon firm delivery should be ended prior to the peak demand of the summer of 1976 at which time the water will no longer be 'surplus. 4. The contract should also include language to allow you to sell surplus water on an inter- ruptable basis at rates exceeding 2 MGD or a term beyond 1976 providing prior notice is given • by Tigard Water District and concurred with by the City. I am attaching some of the calculation sheets we used in ar- riving at this recommendation. You will note that in order to continue selling water to Tigard during 1976 and beyond, it appears necessary that the City embark on a capital improvements program some six years earlier than it would to meet the needs of your present service area (other than the $1,244 ,000 present- ly pending) . In light of the anticipated extra revenue , it ap- c pears desirable at this time. 44t,d City of Lake Oswego 2 August 1972 Page Two I mention this to point out that your capital requirements are based on the 1965 report which is now seven years old and sore- ly needs to be updated. The final configuration of your treat- ment plant, transmission mains , reservoirs , developments such as Mt. Park and outside water sales need to be considered to arrive at a realistic construction and financial schedule. Selling water to Tigard for the next few years appears safe, but any sales beyond that time or rendering service to the new units of Mt. Park without checking out the system capabil- ity and requirements can lead to severe operating problems. Joe Worth gave Dave Abraham a draft of scope for a Water Study Update last October, and I strongly recommend that this be revived to allow the City to plan intelligently for its water needs in the future. Let me know if we can be of further assistance. Sincerely yours , William E. West 7 • r.1.12rI EN'111FERS SUBJECT - BY Wct't) DATE1.- ANNFP5 SHEET NO._ L _ OF HILL Ern,J•41S TS - PROJECT NO.2 G CLVELP. LAKE 05 Wf----GO Wi-rrE (2. IV) 7-1D (14:1 Repayk. P.29 klCat7 *oy- May lati -Popula-L:,A CAP, irAc Cup. imp.* vna 8.45 20,000 6,7.44,000 Nuo . , 1 °113 8.8S- 21,200 -ILI 94(0 22,600 • I 1 5 k 0.4 4,000 I SS,000 2,3"7 V.000 0 I 5.0 32, 000 (0-7(,,WD 24°133,000 : IcIVC V33 -3eig 00 1,5 33, 600 000 cri 0 24.8 .1-46,,400 2 77, 000 G2Oo3 •• I • ASSQ YYle G /a-11 t.4 v1/4.4` c..ft I-- ' jer12 (AC-TUAL-) 1,40 MG1). -cr 1)001)10410,4 0c 111(. 00 20 (Z '3 2 per/s„v 1 3so c3-pspd e00-c-"V ?YeLc-C-ol- IN1(1sA B. S MG Cor' 20,000 pop.' .z "Pers/ser., V320 g p s pd • %Mr • _ _ • C2s11 FNG'NEERS SUBJECT - BY__ —_ DATE _ _ Ilj .'k- PIANNEHS SHEET NO._ _OF.,7_3 _ HILLFCc3 OM.srs _ PROJECT NO.-,. — — — - N. u '" q2 1 u N �q N ,, a. Q. a- ° Z, z k 0) c, N. 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Z. dC t< t< N p c`0 CJ 00 • a:- 0‹. 6= LLE s • i .. } � dQQ8 _ o c,-,- M ;n �' ki ��,, O �_ . - © `-, c\ --- •. . \ ....., r • (t . . ‹r . __,, . i 4 s . lie _ a �r vii,/(4 1 3 V fit`P 4' .0 .1 C/- -t-''.: -1,,N 7.- . . . z . 0 , . . r.,' _ • , (1—.°:. I-- c:- J . �1 W (s--= cis —-. (� (�� �7 c. N. - - — N ..NI EV . - fit. - V Q ` Z 4,Yrrr M N ---V1 0 o: I N n n r- N r, r Oz C CO134 Z. G', un 0 th G) 0 0 6\ 0 ( J� 31 March 1970 Project No. C4371 .0 i'r. donne Sector City t'aanar;cr City ft 11 Lake Oswe!;o, Oris-on 97034 Dear Deane: tater Service to Ti card Following our 26 March luncheon with Steve Teifer, Tir.ard City >'::nar;t r, you asked us to prepare a brief report, outlining the elements of Lake Osweno's water system and its capabilities of servin i the City of T1 erd. Our report Is enclosed. I interpreted your instructions to rcan that the report should suriqarize fir► the present situation and the prior work that was done to estimate the cost of servine wholesale customers outside of the city limits of Lake Oswego. a have done that. I should point out that our report, bel no limited to surrari z i nc past work, describes facilities for servinn Tic;nrd that we think are unrealistic. As you ray recall , r7ayor Kyle, in June 1969, inquired as to the practicability cf obtalnin'; 3 11GD from Lake Osworo. Ly tetter dated 9 July t 96(1 WO advised you that 3 IGD could be ries ivorod to the Tigard system at compatible pressures for a capital cost of 525:3,500. At our luncheon r,oetlno the other day, 1 understood Mr._Jolter to say that the Tic-erd Yater District served a population of about ` 8,CO _and that ex i sti nq wells would be 'phased-cut' over the next few years if another c_;eod quality source could be obtained. If our I nterpretati cnS are 4 1 A`i ; ,; = correct, Ticard's water ;;ends wi l i probably parallel Luke Cswego's. The 3 I:GD t supply requested by Mr. Kyle would then be Insufficient for Ticard's needs. To size the rumpinrf and pipinn additions n::.ded to serve throuc;hout a practical ar:ortlzation peried and to estir'ate the cost for these facilities would require r:ore of a study than was intonded. It seemed quite obvious to me that the City of Tigard, the Tinard ;+eter District, or the two jointly, should contract for an en^ineerinn inv::sti;.:tion of water supply alternatives. Until Ticard has soiectod a course of action for increased water supply, a major expenditure as would be needed to secure even an interim peakln:j source from Lake Oswe;o appears III-advised and unlikely. Mr. Deane Seeder 31 March 1970 Pape If we can supply additional Inforr,ation rolattnn to miter service to 7inard, please) c;1ve mo a call . Vory truly yours, COP,NELL, H0.{LA 0 HAYES tG fERRYF I ELD Kenneth D. Eyiolraan KDl:/co cc: Mr. D. J. Abraham Enclosure • • • LAKE OS'WEGO WATER SYSTEM err►' GENERAL DESCRIPTION Lake Oswego obtains its water from the Clackamas River. The point of with- drawal is approximately three-quarters of a mile upstream from the confluence of the Clackamas and Willamette Rivers. Raw water entering the intake structure flows through a large stationary bar screen to exclude the larger floating and suspended material , thence through a self-cleaning movable screen, having 1/8- inch square openings. The traveling screen excludes leaves, twigs, fish, and similar foreign materials. Deep well turbine pumps located in the intake structure pump the screened water through a 2.5 mile long, 27-Inch diameter steel pipeline, under the Willamette River, to the water treatment plant located in the Robinwood area of West Linn. As the water enters the treatment plant, chlorine is added for sterilization, rrr aluminum sulfate is added to aid the settling process, and lime is added to raise the pH of the water from an acid condition to a neutral state. The water then flows through the sedimentation basins where most of the heavier suspended matter settles to the bottom. The basin effluent is then filtered, rechlorinated, and directed into the clearwell , a 0.4 million gallon underground reservoir, located beneath the Operations Building. Activated carbon Is added in the clearwell to correct taste and odor problems if and when they occur. The treated water is pumped from the clearwell through a 2-1/2 mile long, 24-inch diameter pipeline to the city distribution system. WATER QUALITY The treated water quality is excellent, being soft, clear, cold, noncorrosive, and without objectionable taste or odors. The water is somewhat similar to Portland's Bull Run water with the major differences being that Lake Oswego's water Nur is not quite as soft nor as cold as Portland's but having better clarity, no taste and odor problems, and is chemically stabilized, i .e. , the stabilized water will not, of itself, deposit carbonates (an encrustating condition) or dissolve ``r, metallic ions (a corroding condition) in metallic containers such as pipelines, boilers, tanks, etc. SUPPLY SYSTEM CAPABILITIES The recently constructed supply system has a nominal rated capacity of 10.7 million gallons per day (mgd) . Using built-in standby facilities the present system could produce up to 15 mgd if necessary. The City also maintains 2 mgd of.wei I capacity in standby condition for emergencies. 4)04_ A„::,)„,71.7.7„,/: ;„;1`. ,/: Prior to the new plant start-up, Lake Oswego had experienced maximum day demands exceeding 4 mgd with limited supply capabilities. Expectations are that the 1970 maximum day demand will exceed 9 mgd, The raw water intake, treatment plant, and water transmission pipelines should be capable of supplying the City's water needs for the next 5 to 10 years without further modifications. SUPPLY SYSTEM EXPANSIONS Lake Oswego has a valid permit for withdrawing 50 cfs (32 mgd) from the Clackamas River. A CH2M study of water rights, low river flows, and projected water needs, not yet published, suggests that the natural low flows in the Clackamas River will satisfy current consumptive water rights; are adequate to meet the State's recent 400 cfs right for fish and water quality protection; and will , in addition, provide enough water for the projected domestic needs of the Oregon City-West Linn-Mi Iwaukie-Lake Oswego service area to the year 2000. Lake Oswego should have no difficulty obtaining additional water rights if the need can be shown. • The supply system was designed for expansion to a nominal rated output of 32 mgd, the expected requirements of Lake Oswego in the year 1995. When fully expanded, as envisioned, the plant will have a 35 percent overload reserve, i .e. , a peaking output of 43 mgd, using standby facilities. Now Expansion of the supply system will include: I . Installation of additional pumps at the intake. 2. Construction of a second transmission pipeline from the intake to the plant and a second pipeline from the plant into the City. 3. Construction of 8 additional filters and sedimentation basin modifications at the plant. 4. installation of additional pumps at the plant. 5. Installation of additional controls. The nucleus of the plant, the most costly element, was constructed to accommodate the 32 mgd rated output. The present treatment facilities could be expanded to at least 60 mgd on the present site should enlargements of this magnitude become necessary. The incremental expansion costs to 60 mgd will be somewhat higher than the incremental costs for expansion to the 32 mgd rate, but much less than constructing a second treatment facility. DISTRIBUTION SYSTEM `'fir The base Level of the City's distribution system has a static hydraulic gradient at elevation 320 feet. This pressure zone serves the east and west ends of the City and a narrow strip of land along the north shore of the lake, all below elevation 230 feet. A 24-inch arterial pipeline reducing to 18-inch near the Country Club is the principal distributor of water in this pressure zone, extending from the easterly city limits to Waluga Park near the west city limits. A second, more or less parallel , arterial pipeline, tentatively sized at 24-inch, is scheduled for construction in the early 1980's to deliver the expedted water demands to the rapidly developing northwesterly part of the city. SERVICE TO TIGARD in June 1969, Mayor Kyle of Tigard inquired as to the practicability of obtaining 3 mgd from the Lake Oswego system. Lake Oswego can easily supply the 3 mgd requested. The elevation of the hydraulic gradient in the Tigard water system is approximately 415 feet which would be compatible with Lake Oswego's Lake Grove pressure level as described in our 1965 comprehensive report on the water system. The Lake Grove pressure level , as it presently exists, and as wom,, proposed for expansion, has a hydraulic gradient elevation of 470 feet. The Waluga pump station, now under construction, would be the main source of water for that pressure zone. For Tigard to receive 3 mgd, we would sucgest a 16-inch diameter pipeline be constructed from the city's 18-inch line on Quarry Road to and along Fosberg Road to Melrose, then westerly alone Melrose Road and the westerly extension thereof, to intersect Tigard's existing 12-inch waterline on Varnes Road on the westerly side of interstate 5. A master metering station should be installed in this line on the westerly side of the freeway, and a pressure-reducing station should be installed somewhere between Fosberg Road and Interstate 5. Construction of the 16-inch line, the pressure-reducing and metering stations, and installation of added pumping capacity at Waluga pump station, will cost approximately $250,000. We estimate that Lake Oswego's cost for water furnished to Tigard would be approximately $0. 18 per thousand gallons. This price includes the energy costs for pumping the 'raw water at the intake, and the finished water at the plant; the costs of chemicals used in the treatment process; water treatment plant operators' salaries; plant and intake maintenance costs; amortization of the intake, water treatment plant and water transmission pipelines; a wheeling charge for the pro rata capacity of the arterial distribution pipelines to the Waluga pump station; and the energy cost for secondary pumping at the Waluaa pump station. The $0. 18 figure does not include amortization of the $250,000 investst- ment to get the water from the Waluga area to the City of Tigard. The £0. 18 rate is also based on the assumption that Tigard would have a load factor similar to that of Lake Oswego, i .e. , Lake Oswego would supply Tigard on a year round basis as opposed to a summer peaking arrangement. �rw o F EXECUTIVE DEPARTMENT 4i./� �D asie ; O 85 LOCAL GOVERNMENT RELATIONS DIVISION PUBLIC SERVICE BUILDING • • • • • SALEM, OREGON 97310 TOM McCALL July 18 , 1972 GOVERNOR CLEIGHTON PENWELL Director Mr. Robert E. Santee Tigard Water District 8841 S.W. Commercial Street Tigard, Oregon 97223 Re: Tigard Water District Water System Expansion PNRS #7205 2 470 Dear Mr. Santee: In our correspondence to you dated June 20, 1972 , we indicated that the concerns raised by state agencies were of New local impact and that we were deferring consideration of your application to the Regional Clearinghouse for their action. We have been informed that formal action has been taken by the Regional Clearinghouse, Columbia Region Association of Governments (CRAG) . At the CRAG board meeting on July 7 , 1972, your application was "tabled indefinitely until such time that appropriate considerations of the relative impact of the project can be figured out and plans have been developed to inter- relate those related needs and services with your project. " Our position is in support of their determination. We will monitor the progress of your application to determine that the considerations raised by state agencies will be properly addressed and resolved by the local governmental agencies involved. The State Clearinghouse is deferring its sign-off until the issues are resolved and, in accordance with the provisions of OMB A-95, request the right to review and comment upon your final proposal for a period of 30 days before submission to the funding agency. Mr. Robert E. Santee - 2 - July 18 , 1972 If you have any questions regarding this matter, lowe please contact Bill Kramer of my office, 240 Cottage S.E. , Salem 97310, Ph 378-3732. We are anxious to help. Sincerely, it-e/dtl Ro ert K. Logan Administrator RKL:Km cc: CRAG 'fir r S. W. OLESON ROAD SUPPLY MAIN Preliminary Construction Cost Estimate Item Description 16" 18" 20" 244 1 Ductile Iron Pipe - 6637 Iin.ft. $82,950 $92,715 $102,480 $122,325 2 M.J.C.I. Fittings 3,360 3,940 4,830 6,040, 3 12" Gate Valve Units - 2 ea. 680 680 680 680 4 Asphalt Pavement Cut & Repair 6,250 6,635 6,995 7,730 5 Gravel Surface Cut and Repair 4, 180 4,440 4,715 5,200 6 Extra Depth Excavation 160 170 180 190 7 Select Backfill 4,495 4,745 5,020 5,545 8 Connection to Existing Main 210 235 260 315 Now 9 Butterfly valves incl. boxes - 2 each 2, 130 2,500 3, 130 4,840 10 Conc. driveway cut and repair _ 105 105 105 105 11 Relocation of existing utilities 2, 100 2, 100 2, 100 2, 100 12 Clearing and Grubbing and restoration 2,090 2,090 2,435 2,780 Estimated Construction Cost $108, 710 $120,355 $132,930 $157,850 Engineering & Overhead 10,870 12,035 13,290 15,785 Total Estimated Cost $119,580 $132,390 $146,220 $173,635 Estimated Cost Per Foot $18.02 $19.95 $22.03 $26. 16 .... Of e,-) C° I In ,26.01 . ,.., r- r 1 MA P c. 3 i . e c • . . ... VI('`..(T C-3 1000 100 . -.8 8 At. 8 504 . 0 10 at_LJE RIDCF . 1 . , TAX LOT 2400 CANCELLED ! 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