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06/25/2001 - Packet TIGARD WATER DISTRICT BOARD of COMMISSIONERS MEETING Serving the Unincorporated Area AGENDA Monday, June 25, 2001 7:00 p.m. 1. Call to Order 2. Roll Call and Introductions 3. Approval of Minutes— May 22, 2001 4. Visitor's Comments 5. Approval of FY 2001/2002 Budget 6. Intergovernmental Water Board Update—Norm Penner 7. Swearing in Ceremony Mary Stobbe Bruce Stobbe 8. Non-Agenda Items 8. Set next meeting date 10. Adjournment Executive Session: The Tigard Water District Board may go into Executive Session under the provisions of ORS 192.660 (1)(d),(e), & (h) to discuss labor relations, real property transactions, and current and pending litigation issues. All discussions within this session are confidential; therefore, nothing from this meeting may be disclosed by those present. Representatives of the news media are allowed to attend this session, but must not disclose any information discussed during this session. TIGARD WATER DISTRICT BOARD OF COMMISSIONER'S MEETING Tuesday, May 22, 2001 Members Present: Beverly Froude, George Rhine and Norm Penner Staff Present: Ed Wegner and Twila Willson Visitors Present: Mary Stobbe and Bruce Stobbe 1. Call to Order The regular meeting of the Tigard Water District Board of Commissioners was called to order by the acting chair, Commissioner George Rhine, at 7:00 p.m. 2. Roll Call Staff called the roll. Commissioner David Strauss was excused. Commissioner Gretchen Buehner was not present. She has resigned but has not submitted a written resignation and, therefore, was included in the roll call. 3. Approval of Minutes—April 23, 2001 Commissioner Norm Penner motioned to accept the minutes as submitted for the April 23, 2001, meeting. Commissioner Beverly Froude seconded the motion. The vote was unanimous to accept the minutes as submitted. 4. Visitor's Comments Commissioner Rhine held off comments from visitors to allow Ed Wegner time to report anything he needed to pass onto the Board before leaving to attend the Tigard City Council meeting, also being held at that time. Mr. Wegner reported that Dennis Koellermeier has been hired as Utility Manager. Dennis has over 20 years experience with the City of West Linn, Public Works. Dennis is working on summer supply projects for Ed and will start with the Tigard Water District in July. Summer supply looks good unless there are long periods of extremely hot, dry weather. Ed has been working closely with PGE on the potential problem. Recommendations will be made for even/odd, voluntary water use days. It is hoped there will be regional participation in this campaign. He does not think the City of Portland will participate. They think they have plenty of water and fear problems with the green industry (landscape companies, etc). The even/odd campaign will help control the peaking. It is not only the drinking water that needs to be kept in mind, but also the emergency services (structural or grass fires). Dennis is preparing news releases on this. This Tigard Water District Minutes - 1 - May 22,2001 recommendation will be presented to the Intergovernmental Water Board (IWB) on Wednesday and then to the Tigard City Council. Commissioner Froude requested that Ed present this information to the Citizen Involvement Team (CIT), which meets the first Thursday in June. Citizens can complain or speak their mind at the meeting and information is also dispensed. The meeting is televised locally on Channel 22. Dennis Koellermeier and Sara Danz (the Water Conservation Program Coordinator) will be in attendance at the June meeting and will be taping something for the July meeting. Mr. Wegner told the newly elected Board Members, Mary Stobbe and Bruce Stobbe, that he and Dennis Koellermeier would be glad to meet with them during the next month to review water issues in an effort to bring them up to date. Commissioner Froude asked Mr. Wegner if the TWD chose to meet less often, if it would be productive and beneficial to receive the IWB minutes to keep the board members current on water issues. He guaranteed the members of the TWD Board that they would receive the IWB minutes if they held fewer meetings. There was a brief discussion as to whether the minutes should be sent prior to or after approval. It was decided that the draft form of the minutes would be better with the understanding that final approval would be needed. There is not a need to meet monthly now. If the TWD were to go to fewer meetings, it would also free up more time for Dennis and Twila to work on the newsletters that the TWD wants to distribute. It was mentioned that there would be a time when water issues would require the Board to meet more frequently so there would be a need for flexibility. There were no further matters to discuss with Mr. Wegner and he was excused to attend the Council Meeting. Commissioner Rhine welcomed Bruce and Mary Stobbe as newly elected board members and looked forward to their continued participation. Their term of office will start July 1, 2001. Twila Willson stated she received certificates that are to be presented following the swearing in ceremony. She spoke with the Elections Board and they informed her the swearing in should be performed the month prior to their taking office, which would put the swearing in ceremony in June. The Board will meet in June to approve the budget and swear in the new Board Members. Bruce Stobbe stated he was interested in Mr. Wegner's comments about the even/odd water days. He said he also owns property in Wilsonville where they are practicing that now. He expressed the poor example the City of Wilsonville has made by turning water on and letting it run for two or three days at a park. He felt the City should follow their own suggestion. Commissioner Penner added that it is everyone's responsibility to tell our neighbors and/or the City when we see someone misusing water. He related an example when the City noticed his water usage was much higher than usual. They contacted him to see if there was a possible leak. He praised City of Tigard employees for being so alert and helpful. Mr. Stobbe stated he and his wife used to own a water company and they knew what was involved. Tigard Water District Minutes -2- May 22, 2001 5. Intergovernmental Water Board Update Commissioner Penner indicated that the IWB has not met since the last TWD meeting and therefore, he had nothing new to report. The IWB will meet tomorrow night and Commissioner Penner has received the agenda. He thinks neighbors living near the Clute property will probably come back to the IWB in an effort to acquire the land to make a park from that excess land. It is his understanding that the property was paid for with water money and therefore should be used to purchase property elsewhere to put in another reservoir. The park issue is up to Washington County to handle. He wanted to know how to represent the TWD Board. Commissioner Froude asked Commissioner Penner to get the names of those citizens who attend the meeting. He said he would get the information. There was a discussion about the need for a park in that area, but the final outcome was that the appropriate use of the money would be for reservoir site purchases. 6. Non-Agenda Items • Commissioner Froude brought a copy of an article she saw in the Tribune as a point of interest. The article was about Portland's Commissioner Sten and his ideas for a regional water system. Twila Willson notified the Board of receiving a request from the Special District's Association for an update of Board Member information for publication. The Board members reviewed the information and made changes where appropriate. Information about Mary and Bruce Stobbe was also collected to add to the form. She also informed the Board that envelopes for the TWD were completely depleted. There still was a supply of stationery. She requested their approval to order more envelopes. Approval was given. 7. Set next meeting date The next regular meeting for the TWD was scheduled for June 25th at 7:00 p.m. The Community Room at Tualatin Valley Fire and Rescue has been reserved for that date. 8. Adjournment Commissioner Penner motioned to adjourn and Commissioner Froude seconded the motion. The Board unanimously voted for adjournment at 7:22 p.m. Tigard Water District Minutes -3- May 22,2001 >1.717GAR:;. IC ';:.... • May 22, 2001 Members Present: George Rhine, Norman Penner, Beverly Froude, Doreen Hames, Noel Johnson, and Ron Baker Staff Present: Craig Prosser, Ed Wegner, Twila Willson Visitors Present: Mary Stobbe and Bruce Stobbe 1. Call to Order The Tigard Water District Budget Meeting for fiscal year 2001-2002 was called to order by the appointed budget officer, Commissioner George Rhine, at 6:07 p.m. 2. Roll Call and Introductions Staff called roll. Gretchen Buehner and David Strauss were not present. David Strauss was excused. Gretchen Buehner's written resignation has still not been received. Mike Shirley and Faye Witherspoon were not present. Commissioner Rhine welcomed the participants and thanked the citizens who serve on the budget committee. Doreen Hames, Mike Shirley and Noel Johnson are serving the last year of their appointed three-year term. This is the second year of the appointed three-year term for Ron Baker and Faye Witherspoon. Faye Witherspoon has asked to be relieved of her duties due to health problems. 3. Appointment of Budget Committee At Commissioner Rhine's request, Ed Wegner proceeded to give a brief background on the Tigard Water System. The Tigard Water District receives water services through the Tigard Water Service System, which is operated by the City of Tigard. Referring to a map, Mr. Wegner showed the four entities within the service area. The Tigard Water System services most of the City of Tigard as well as residents of the cities of Durham and King City and the unincorporated surrounding area. A small portion of the City of Tigard is serviced by the Tualatin Valley Water District. The Tigard Water District, also known as the unincorporated area, is the area that the Budget Committee represents. That budget does not include the operation of the water system such as replacement of water mains, which would be handled by the operational staff. The budget does include such things as newsletters and insurance, etc. Tigard Water District 1 May 22,2001 Budget Meeting The four major entities (Tigard, Durham, King City and the unincorporated area) each have a representative that makes up a policy-making board known as the Intergovernmental Water Board (IWB), which was established in 1993. Norm Penner is the TWD representative on the IWB Board. The IWB meets regularly with staff to discuss long term water supplies and capital improvement plan expenditures. The IWB acts as an advisory body. Resolutions from each governing agency would be needed to decide on the long term water supply source. The Tigard City Council does all the formal action for the service area, but always asks if the IWB is in agreement. The money for the budget is received from the water sales. One percent is returned to each of the governmental entities, excluding Tigard, on an annual basis to use for their operational needs. Ron Baker asked when the Walnut Island annexation took place. Mr. Wegner told him it took place one year ago. Mr. Wegner continued talking about annexation. The areas that will be annexed into the City of Tigard in the future will come from the unincorporated area. That area will get smaller geographically as annexations take place. The unincorporated area is growing faster than the rest of Tigard, King City or Durham keeping revenues up now, but money will eventually diminish as areas are annexed. The TWD governing board eventually will not exist. 4. 2001/2002 Fiscal Year Budget Discussion Craig Prosser reviewed the budget items. Resources • Revenues — anticipated to remain constant with the rate increase Expenditures — propose a reduction • Attorney fees — have not spent anything to date; propose reducing to $500 All other line items are consistent with the previous fiscal budget. Money has been budgeted for: • Public Relations —for newsletter or informational brochures ($1068.00 spent to date) • Special District Association Dues — annual dues • Special District Association Conference — to cover annual conference fees • Travel/Food & Lodging —for the board's expenses at the annual conference Meeting and Staff Support expenses are reconciled at the end of the fiscal year (covers expenses for Mike Miller, Ed Wegner, and Twila Willson). Advertising and Publicity, to date, is lower than budgeted for. There is a 10% contingency that could be accessed through a budget amendment and moved to another line item, if necessary. Mr. Wegner said that typically the Tigard Water District 2 May 22,2001 Budget Meeting TWD has a hard time spending money because the water fees pay for all the maintenance and operation of the system. Commissioner Penner added that Board members are entitled to an honorarium although they never have collected one. Ron Baker asked further explanation on the contingency. Mr. Prosser explained that money could only be accessed if the Board authorizes a budget change during the year moving it to another line item. Beverly Froude asked if Mr. Wegner could see anything happening to require more newsletters. He thought nothing special at this time. His recommendation would be to produce two newsletter mailings during the fiscal year. Some people are reached through the Cityscape publications. The Tigard Water Service System would notify to all those affected if there were to be a new water supply or something similar in nature. Under the terms of the agreement, 90% of the time, water fund money is used for general notification of utility users. Water conservation messages also will be included with billing notices. The TWD may want to send as many as four small scale mailings during the year. There is not enough staff time to do more than that and it gets very cost prohibitive. Commissioner Penner was very helpful with the last newsletter that was sent out. Dennis Koellermeier is the new Utility Manager, replacing Mike Miller. He will start coming to the TWD meetings after July. He would be a good resource along with Twila to help with the newsletter information. Noel Johnson asked about the feasibility of including flyer information with the regular billings. Mr. Wegner explained that the billings are computerized and set up over a staggered eight-week cycle and overlap different areas making it impractical to directly notify in that manner. Notification of the rate increase was done this way, but that was generic in nature. Urgent messages would not work in billing notices. 5. Budget Recommendation Noel Johnson motioned to approve the proposed budget as submitted and Ron Baker seconded the motion. The motion passed unanimously. The Finance Department will publish a copy of the proposed budget in the legal section. The Tigard Water District will meet next month to approve the budget. 6. Adjournment Commissioner Rhine thanked the budget committee for their participation. The Tigard Water District Budget Committee meeting was adjourned at 6:38 p.m. Tigard Water District 3 May 22,2001 Budget Meeting Tigard Water District Budget Calendar for FY 2001-02 04/25/01 April 23, 2001 Regular Board Meeting Appoint Budget Committee Select Budget Officer Present Budget Calendar April 25, 2001 Submit Newspaper Ads to Community Newspapers For publications on May 3 & 10, 2001 May 3, 2001 First Newspaper Advertisement Public Hearing & Budget Committee Meeting May 10, 2001 Second Newspaper Advertisement Public Hearing & Budget Committee Meeting May 22, 2001 Budget Committee Meeting —Approve Budget Budget Message Budget overview Financial condition Public discussion May 29, 2001 Submit Public Hearing Notice & Summary of Approved budget to Community Newspapers For publication on May 31, 2001 June 14, 2001 Publish Public Hearing Notice & Summary June 25, 2001 Board adopts budget and makes appropriations June 27, 2001 Submit Adopted budget to the State of Oregon July 1, 2001 Adopted Budget takes effect Tigard Water District Adopted Budget Fiscal Year 2001/2002 Actual Actual Actual Adopted Proposed Approved Adopted 1997/98 1998/99 1999/00 2000/01 Resources 2001/02 2001/02 2001/02 Revenues 9,217 8,889 9,661 9,000 One Percent Water Sales 9,000 9,000 1,769 2,264 2,474 2,400 Interest Earnings 2,400 2,400 5,372 Recovered Expenditures 10,986 11,153 17,507 11,400 Total Revenues 11,400 11,400 31,403 38,702 44,957 46,000 Beginning Balance 55,000 55,000 42,389 49,855 62,464 57,400 Total Resources ¢6,400 66,400 Expenditures Total Personal Services Materials and Services 59 362 6,318 6,000 Attorney 500 500 10 10 Financial Reveiw 10 10 51 291 300 Contract for Board Minutes Engineering Services 4,872 4,000 Meeting/Staff Support 4,800 4,800 119 653 11,190 10,310 601000 Professional/Contractual Svcs 5,310 5,310 703 800 Election Costs 800 800 115 500 Misc 500 500 818 1,300 613000 Special Department Expense 1,300 1,300 185 620000 Office Supplies&Expenses 200 200 100 159 100 Meeting Notice 200 200 882 3,000 Public Relations 3,000 3,000 100 882 159 3,100 621000 Advertising&Publicity 3,200 3,200 910 BoundraryCommission Dues 356 356 Metro 100 120 120 120 Special District Assoc Dues 120 120 1,010 476 120 476 623000 Dues&Subscriptions 120 120 650 624000 Travel/Food&Lodging 650 650 400 625000 SDAO Annual Conference 400 400 2,458 2,069 1,220 1,400 632000 Insurance 1,300 1,300 3,687 4,898 12,873 17,636 Total Materials and Services 12,480 12,480 Total Capital Outlay 3,687 4,898 12,873 17,636 Total Expenditures 12,480 12,480 1,764 Contingency 1,248 1,248 3,687 4,898 12,873 19,400 Total Appropriations 13,728 13,728 38,702 44,957 49,591 38,000 Ending Fund Balance 52,672 52,672 Total Appropriations and Ending 42,389 49,855 62,464 57,400 Fund Balance 66,400 66,400 I:IFINWANCYLARSON\EXCEL\CITY\BUDGET\O2TWDBGT.xl$,G.F. 5/29/01 9:48 AM FORM LB-1 NOTICE OF BUDGET HEARING A meeting of the Tigard Water District_— will be held on -_ June 25 ,2001 (Governing Body) (Date) 7:00 a'm' Tualatin Valley Fire& Rescue Community Room at ®p.m.at_ .The purpose of this meeting is to discuss the budget for (Location) the fiscal year beginning July 1,2001 as approved by the___ Tigard Water District Budget Committee. (Municipal Corporation) A summary of the budget is presented below.A copy of the budget may be inspected or obtained at City of Tigard Water Building, - 8777 SW Burnham Street, Tigard Oregon _between the hours of 8:00 a.m. and_5:00 p.m. _This budget was prepared on (Street Address) a basis of accounting that is consistent;0 not consistent with the basis of accounting used during the preceding year.Major changes, if any,and their effect on the budget,are explained below. County City Chairperson of Governing Body Telephone Number Washington Tigard George Rhine (503 ) 639-4171 FINANCIAL SUMMARY Check this box if your TOTAL OF ALL FUNDS Adopted Budget Approved Budget budget only has one fund. This Year—2000-2001 Next Year—2001-2002 1. Total Personal Services 0 0 2. Total Materials and Supplies 17,636 12.480 3. Total Capital Outlay 0 0 Anticipated 4. Total Debt Service Requirements 5. Total Transfers 6. Total Contingencies...... .... . .. . . .. 1,764 1.248 7. Total All Other Expenditures and Requirements. . ... .... 8. Total Unappropriated Ending Fund Balance. 38,000 52,672 9. Total Requirements—add lines 1 through 8 I 57.4012 66.400 I Anticipated 10. Total Resources Except Property Taxes I 57,400 66.400 Resources 11. Total Property Taxes Estimated to be Received 0 0 12. Total Resources—add lines 10 and 11 57.400 66,400 I 13. Total Property Taxes Estimated to be Received(line 11)._ Estimated 14. Plus:Estimated Property Taxes Not to be Received Ad Valorem A. Loss Due to Constitutional Limits. Property Taxes B. Discounts Allowed,Other Uncollected Amounts 15. Total Tax Levied—add lines 13 and 14 Rate or Amount Rate or Amount Tax Levies 16. Permanent Rate Limit Levy (rate limit By Type 17. Local Option Taxes 18. Levy for Bonded Debt or Obligations. STATEMENT OF INDEBTEDNESS Debt Outstanding Debt Authorized,Not Incurred ®None ❑As Summarized Below ®None ❑As Summarized Below PUBLISH BELOW ONLY IF COMPLETED Estimated Debt Outstanding at the Estimated Debt Authorized,Not Incurred at the Long-Term Debt Beginning of the Budget Year Beginning of the Budget Year July 1,2001-2002 Approved Budget Year July 1,2001-2002 Approved Budget Year Bonds Interest Bearing Warrants Other Total Indebtedness. Short-Term Debt This budget includes the intention to borrow in anticipation of revenue("Short-Term Borrowing")as summarized below: Estimated Amount Estimated Estimated FUND LIABLE to be Borrowed Interest Rate Interest Cost 150-504.001(Rev.11-00)Web FORM FUNDS NOT REQUIRING A LB-2 PROPERTY TAX TO BE LEVIED Publish ONLY completed portion of this page.Total Anticipated Requirements must equal Total Resources. Name of Actual Data Adopted Budget Approved Budget Fund Last Year 1999-00 This Year 2000-01 Next Year 2001-02 1. Total Personal Services 0 0 0 2. Total Materials and Services 12,873 17,636 12,480 3. Total Capital Outlay 0 0 0 4. Total Debt Service 0 0 0 5. Total Transfers 0 0 0 6. Total Contingencies 1,764 1,248 7. Total All Other Expenditures and Requirements 12,873 19,400 13,728 8. Total Unappropriated Ending Fund Balance 49,591 38,000 52,672 9. Total Requirements 62,464 57,400 66,400 10. Total Resources Except Property Taxes 62,464 57.400 66.400 Name of Actual Data Adopted Budget Approved Budget Fund Last Year 1999-00 This Year 2000-01 Next Year 2001-02 1. Total Personal Services 2. Total Materials and Services 3. Total Capital Outlay 4. Total Debt Service 5. Total Transfers 6. Total Contingencies 7. Total All Other Expenditures and Requirements 8. Total Unappropriated Ending Fund Balance 9. Total Requirements 10. Total Resources Except Property Taxes Name of Actual Data Adopted Budget Approved Budget Fund Last Year 1999-00 This Year 2000-01 Next Year 2001-02 1. Total Personal Services 2. Total Materials and Services 3. Total Capital Outlay 4. Total Debt Service 5. Total Transfers 6. Total Contingencies 7. Total All Other Expenditures and Requirements ' 8. Total Unappropriated Ending Fund Balance 9. Total Requirements 10. Total Resources Except Property Taxes Name of Actual Data Adopted Budget Approved Budget Fund Last Year 1999-00 This Year 2000-01 Next Year 2001-02 1. Total Personal Services 2. Total Materials and Services 3. Total Capital Outlay 4. Total Debt Service 5. Total Transfers 6. Total Contingencies 7. Total All Other Expenditures and Requirements 8. Total Unappropriated Ending Fund Balance 9. Total Requirements 10. Total Resources Except Property Taxes 150-504-002(Rev.11-00)Web 1.,. .,,-- ,•,-;,-. -_-.. _..-.. ' •***144'41, , ...,....,.,:„. . .:_,, ._., . , 4 . -4- ‘ 4 - -4' • . 't ---, , ir • - --.- „ .. ., . 1.„.....A,_. • OW' „, ,,, , - .''''' : - -•- • ". . , ... .. 4 •. - -•, 4 ' - 6 1 '; .• , . * mei' ....7‘'..:i7: : - , . , , N - ,, itlit'- - , -- • I 61 • =' • ' ' , -- :- . . . . ''', . ...• . -kw. . .* PHASE I - ASR FEASIBILITY REPORT June 2001 ._ .„.. -'44111116i .__ .. , . lellimaismilit . .. . .. _ . ,.. _ ... 111111111104 CITY OF TIGARD 1110amit . .. - r ..,:...4. ... . .,. . _ 6 MONTGOMERY WATSON et(itlir lc r Ns:,S4Witit.'”, EXECUTIVE SUMMARY OVERVIEW OF FEASIBILITY STUDY The City of Tigard (City) is pursuing the development of an aquifer storage and recovery (ASR) system using it's existing wells and source supplies. The City currently utilizes surface water from: 1) the Bull Run system via the City of Portland and Tualatin Valley Water District (TVWD), 2) Lake Oswego from the Clackamas River source, and 3) City of Beaverton Joint Water Commission source. In addition, Tigard has four wells. ASR involves the injection of surplus water from other sources during periods of low demand into the aquifer with recovery of the water during the high demand period. This report, the Feasibility Study, is Phase I of a three Phase approach to ASR. Phase II includes the Pilot Test and Phase III is the Full Scale Implementation. Phase I determines the feasibility of the potential for ASR and identifies a potential well to be used in. Phase II — Pilot Testing. Phase II uses the Pilot Test to confirm aquifer performance, and to confirm the feasibility of full-scale implementation. Study Objectives The purpose of the ASR Feasibility Study is to evaluate the feasibility of developing an ASR system for Tigard. The Feasibility Study involves an assessment of the potential storage capacity in the aquifer, recharge and recovery rates for wells, and potential impacts on groundwater conditions and water quality in the storage aquifer. The overall purpose of the feasibility study is to identify whether there are any potential fatal flaws for ASR and to determine the optimum strategy for implementing pilot testing to further evaluate ASR. There are several elements of the Phase I ASR Feasibility Study including: • How ASR fit's into the City's overall water supply and identifying source water • Determining which City well is best suited for ASR pilot testing • Characterizing the hydrogeology in the area of the test well • Evaluating water quality compatibility with the groundwater and source waters; and • identifying permitting issues to ensure regulatory success Evaluation of these elements will reveal any fatal flaws for the feasibility of ASR in the City of Tigard. If no fatal flaws are found, then the Feasibility Study serves as the foundation for the development of the Pilot Test Plan — Phase II. One of the critical elements of the Feasibility Study is to determine which of the City's existing wells can be used to conduct the pilot test. In addition, the Feasibility Study will estimate storage volumes, predicte how the water quality may vary within the aquifer during storage, evaluate the source water and effects of mixing with groundwater and identify any permitting issues to ensure regulatory success. CITY OF TIGARD PHASE I—ASR FEASIBILITY STUDY Page ES-I ASR Applications The City wishes to utilize ASR for both short-term and long-term needs. In the short- term, the City's current water supplies from the above mentioned sources do not provide additional water above the current peak day demands (13 mgd). For long-term planning, the City must consider population growth and the renewal of contracts with the City of Portland by 2007. If feasible, the City would like to use ASR to fill the gap in short-term water demands and potentially provide a consistent water supply in the long- term. ASR is a means of lowering the City's costs for peak day and peak season supply. Use of ASR would allow the City to make better use of its existing wells and reduce the need to obtain peak season supply. It may also allow for a more consistent water quality throughout the year. Ideally, the City would like to complete the Pilot Study by the middle of 2002 and begin delivering water to its customers by the summer of 2002. Initial production. would be approximately 1-1.5 mgd. Ultimately, the City would like to utilize ASR with a production of 4-6 mgd within 10 years. Hydrogeological Assessment Hydrogeological investigations completed during the Feasibility Study indicate the following: • The storage capacity within the unconfined basalt (that has been dewatered over the last 50 years) beneath Bull Mountain is estimated to be about 4 billion gallons. This is more than sufficient to enable development of an ASR scheme that is capable of producing up to 6 mgd for periods of up to 8 months; • Injection rates of about 1,000 gpm in individual wells are feasible; • Withdrawal capacities for new ASR wells are expected to range between 400 and 800 gpm and approximate 600 gpm; • In order to achieve a 1.5 mgd ASR scheme pumping for 4 months, 240 million gallons of water would need to be recharged to the aquifer. This volume accounts for a 25% leakage loss. Two wells each injecting at an average daily rate of 2.0 mgd (1,390 gpm) could recharge the aquifer over a 4 month period. This quantity could be recovered over a 4 month period by two wells each pumping an average rate of 520 gpm. • A 6 mgd ASR scheme pumping for 8 months would require recharging of about 1.92 billion gallons of water over a four month period. Accounting for the possibility of 25% losses during the recharge and storage period, about 1.44 billion gallons would be available for recovery. To recharge 1.92 billion gallons over 4 months would require 10 ASR wells each recharging approximately 1,100 gpm. During recovery, each well would operate at an average pumping rate of 400 gpm. Higher recovery rates may be possible for shorter time periods; • There is expected to be no adverse water quality impacts associated with injection of treated surface waters into the basalt; CITY OF TIGARD PHASE I-ASR FEASIBILITY STUDY cf.."...FS-7 • Potential impacts associated with the development of an ASR scheme are likely to include a water level rise in other basalt wells on Bull Mountain. Other potential impacts may include an increase in spring discharge on the slopes of Bull Mountain. • The effects of large-scale water level changes (increases and decreases) on individual well performance require additional monitoring of water levels. Uncertainties Assessment of ASR potential is subject to some uncertainty because of the limited data available for the Feasibility Study. At this time, the hydraulic behavior of the aquifer boundaries are unknown and require further study to determine how they will affect storage quantities and recovery efficiency of the stored water. Resolution of the uncertainty with regard to the aquifer conditions is recommended to confirm storage volumes, injection and recovery rates, groundwater level changes and effects on springs and streams. Pilot Testing The evaluation of the City's four wells indicate that Well No. 1 is best suited for ASR testing based on the hydrogeologic properties of the well and the location of nearby monitoring wells. However, geophysical logging of the well revealed a poor casing, thus requiring repairs for further production of groundwater or ASR development. Repairs to the well or a new well will be needed for the Pilot test in the fall of 2001. A schedule for the Pilot test is shown in Figure ES-1. Cost Estimate for Pilot Phase Il Based on findings from the Feasibility Study, estimated costs were prepared for the Pilot Phase. Costs include the conversion of Well No. 1 to a monitoring well, drilling of a new well on the same site and associated piping, equipment and housing costs. These costs are estimated costs for planning purposes only and are based on previous ASR projects. Table ES-1 lists the costs included in Phase II — Pilot Test. The following assumptions were made in developing the Phase II costs: • A new well can be drilled on the Well No. 1 site and Well No. 1 can be converted to a monitoring well. • The transmission line from the new well will be connected to the existing piping in the reservoir yard. • The distance from the wellhead to the transmission line is 100 feet. • The pump was sized for ASR injection and withdrawal rates at 1000 gpm • No additional water treatment will be necessary beyond the chlorination system currently in place. CITY OF TIGARD • PHASE I-ASR FEASIBILITY STUDY Pace ES-3 • TABLE ES-1 PHASE II PLANING LEVEL COST ESTIMATE dtg_,-,. n... PERMITTING AND WATER RIGHTS* $ 19,5001 WELLHEAD MODIFICATIONS Conversion of Well No. 1 to monitoring well $ 18,0001 New Well Construction Costs I 1 Drill new well on Well No. 1 site (12 in.) 600 ft. I $ 80,0001 Pump and installation (1000 gpm Vertical Turbine w/non- $ 55,000 reverse ratchet) Pump House $ 45,000 • Electrical $ 20,0001 Infrastructure Flowmeter I $ 4,0001- PRV/check valve $ 3,300 Back Pressure valve $ 2,600 Pump Control Valve $ 3,0001 Valves/Fittings $ 8,000 ,SCADA $ 8,000 Dip Tube $ 500 Pressure Transducer $ 3,000 Transfer existing chlorination system $ 8001 Subtotal $ 233,2001 Professional Services 1 Hydrogeological oversite - includes pump test analysis $ 20,000 Engineering Services $ 42,000 Water quality testing $ 3,000 Subtotal $ 65,000 Contingency (20%) $ 63,240 Subtotal I $ 407,940 ASR PILOT TEST I $ 97,000 GROUNDWATER MODEL &WELLHEAD $ 50,000 MODIFICATIONS(If necessary) PILOT TEST REPORT I $ 34,000 TOTAL I $ 579,9401 *$28,500 total costs for permitting. $9000 authorized in contingency from Phase I. Full-Scale Implementation To enable the development of a 6 mgd scheme capable of being used for up to 8 months, up to 10 wells would be required. Based on the City's desire to achieve full- scale production within 10 years an incremental approach is recommended. Specifically, the pilot test well would be converted to a full-scale ASR well followed by CITY OF TIGARD PH4 SF_ I-ASR FEASIBILITY STUDY • an additional well at that site. Subsequently, two wells could be drilled every 2-3 years until the system is fully developed. Assuming the ASR permit is obtained without delay, the first stage of the full-scale scheme could begin in the early part of 2003. Approximately two wells every two years would need to be developed. Figure ES-2 shows the recommended schedule for full-scale implementation. This approach is recommended for several reasons. First, the boundaries of the aquifer are uncertain at this time. Development of each well will help determine these boundaries with little risk to the City. Secondly, the flow characteristics of the aquifer can differ within short distances, thus producing different yields. An incremental approach allows the City to utilize ASR to their specific needs at that particular time. Should the City's contracts with the City of Portland change drastically, the City may decide to limit the need for ASR production. Finally, this approach will allow the City to implement the project without a large upfront investment. • ASR Well Locations and System Phasing • As indicated above, 10 ASR wells will be required to meet the overall performance objectives of ASR. These wells should be developed across the service area such that each well site is limited to a maximum of two ASR wells, unless indicated otherwise via pilot testing. Widespread spacing of ASR wells will reduce interference effects and will minimize the risk to the system in the event of potential groundwater contamination. Figure ES-3 shows the potential and possible ASR wells sites. We have identified sites that are located in close proximity to the City's existing distribution system and where possible are on City-owned property, or on property that is owned by other public agencies amenable to well siting. The number of sites listed provides for some redundancy in the event that the preferred sites are unavailable. Potential sites are those that have the greatest likelihood of success for ASR. Possible ASR sites may have reduced well yields and/or storage volumes may be lower because of less favorable hydrogeological conditions. Cost Estimate for Full Scale System Cost estimates for Full Scale ASR development and implementation are listed in Table ES-2. The costs are presented in increments with 5 stages to complete the ultimate 4-6 mgd ASR scheme. Cost estimates for full-scale implementation were calculated based on the following assumptions: ♦ Ultimate ASR production is 4-6 mgd — a total of 10 wells. • The full scale system will involve the new well used for the pilot test, modifications to existing well 2, and eight new ASR wells; • Purchase of land and extended pipeline cost beyond minimal distance from the existing distribution system is not included. • Costs are based on 2001 numbers. CITY OF TIGARD PHASE I-ASR FEASIBILITY STUDY Page ES-5 TABLE ES-2 PHASE III COST ESTIMATE Des'crijition _ x '", k:+ '��� 4 a ,, PERMITTING igoAgnalttl $ 17,000) 1STAG, 11112FVELOPSECOND;WEL,,C.9AT1WECL?1 N,OP SITE' NEW WELL CONSTRUCTION COSTS (PER WELL) Drill new well (12 in.) $ 80,0001 Pump and installation (1000 gpm Vertical Turbine w/reverse ratchet) $ 55,0001 Pump House $ 45,0001 Electrical I $ 20,0001 }Infrastructure Flowmeter $ 4,000 PRV/check valve $ 3,300 Back Pressure valve $ 2,600! Pump Control Valve $ 3;000] Valves/Fittings $ 8,000! SCADA $ 8,0001, Dip Tube $ 500 Pressure Transducer $ 3,0001 Chlorination system $ 3,5001 Subtotal $ 235,9001 Professional Services Hydrogeological oversite - includes pump test analysis $ 15,000 Water quality testing $ 3,000 Engineering Services $ 35,500! Subtotal $ 53,500) Contingency(20%) I $ 57,900 TOTAL I $ 347,300 IMPLEMENTATION, OPERATION AND MONITORING $ 6,400 STAGE 1 TOTAL I $ 370,70d $,,wagf2.MDE.VELOP-SEC(31VD WEi,MT,,i,wali it o, _ _ MODIFICATIONS TO WELL NO. 2 I $ 50,000 NEW WELL CONSTRUCTION COSTS $ 347,3001 IMPLEMENTATION, OPERATION AND MONITORING $ 6,4001 STAGE 2 TOTAL $ 403,700 $,T jG63, 'D ,1%EC'OP°TWO,WELL �.1,_ ' } t>,.I NEW WELL CONSTRUCTION COSTS($347,300 PER WELL) $ 694,6001 IMPLEMENTATION, OPERATION AND MONITORING $ 6,4001 STAGE 3 TOTAL ( $ 701,00d) NEW WELL CONSTRUCTION COSTS ($347,300 PER WELL) $ 694,600 IMPLEMENTATION, OPERATION AND MONITORING $ 6,400 STAGE 4 TOTAL I $ 701,000 $.TAGEg5 'DEyEr...OV WO WEL L NEW WELL CONSTRUCTION COSTS($347,300 PER WELL) J $ 694,600j' IMPLEMENTATION, OPERATION AND MONITORING $ 6,400] STAGE 5 TOTAL t $ 701,000 GR;4'ND;;;TOTAC ' 3, ti`' �:{` r`l� $1016'T4U01 CITY OF TIGARD PHASE I-ASR FEASIBILITY STUDY Based on 2001 rates and other reasonable assumptions, the cost to purchase water for and operate ASR is approximately 45% less than costs to purchase water during peak season. Table ES-3 shows the cost comparison. TABLE ES-3 FULL-SCALE COST COMPARISON ` f Cos s<toiFkrjttiase Water HF, -'•-,,'",:f;."14 ,..1-::;;-% _. 'Peak Season Water Purchase Rate (per ccf) $ 0.91 'Demand(gpd) I 6,000,000 f Duration (days) + 1201 Total Costs $ 875,9361 I I r ASF_ZC_,osts '•.q..-1:....i,,:-. 1 ,,xz ; '-• , .', -1 i ASR Injection IOffSeason Water Purchase Rate (per ccf) 1 $ 0.301 Ii Pump Costs (per ccf) $ -1 (Storage Needed to Achieve 6 mgd Recovery 8,000,000 '(Assumes 25%water loss) -gpd Duration (days) 120 'Subtotal $ 385,027 ASR Recovery 1 Peak Season Purchase Rate (per ccf) $ -1 Pump Costs (per ccf) $ 0.101 Demand (gpd) 6,000,000 Duration (days) 1201 Subtotal $ 96,2571 Total Costs $ 481,2831 I Annual Savings $ 394,652+ Cost Difference 45%I RECOMMENDATIONS • At this stage it appears feasible to develop an ASR scheme using the Bull Mountain basalt, as such the City should proceed with the development and implementation of a pilot test plan; • In view of the poor condition of Well No. 1 casing, a new production well should be constructed at the Canterbury Lane site that is capable of being used for the ASR Pilot test. The existing well should be converted to a multi-level monitoring well for pilot testing. • Before Wells No. 1 and 2 are used this summer, the well-heads should be modified to enable a water level meter to be used to monitor the water levels in the two wells; CITY OF TIGARD PHASE I—ASR FEASIBILITY STUDY Page ES-7 • In the period prior to the use of the wells, water levels in all of the City's wells should be monitored on a weekly basis; • Arrangements to access the Tigard High School and James Templeton Elementary School wells for monitoring purposes should be put into place prior to the use of the wells; • Consultant should be notified prior to the use of the wells so that consultant staff can be in attendance at the start up of the pumps to record (valuable) early time test data; • During the subsequent period that the wells are used, water level measurements should be taken in both the City's wells and adjacent observation wells and the production totals should be noted. As far as possible, measurements should be taken daily throughout the summer; • Once additional monitoring is complete, the City should confirm how ASR fits in its water supply strategy and identify its role in both short-term and long-term planning. At that time, the City should proceed with the level of ASR that is commensurate with its needs. • Development and implementation of the full-scale scheme should occur incrementally over a 10 year period to allow better understanding of the aquifer performance and allow the City to develop the project with little risk. CITY OF TIGARD PHASE I—ASR FEASIBILITY STUDY If MIL'onnt Page ES-8 FIGURE ES-1 ASR Pilot Project Schedule 2001 2002 2,ki' TASK NAME Jan Feb Mar Apr I May Jun Jul Aug Sep Oct I Nov Dec Jan Feb Mar Apr I May Jun Jul Aug Sep I Oct Nov I Dec J, PHASE 1 FEASIBILITY STUDY I 1.0 Coordination and Project Management I - - - -I 1 1 Protect Management Plan I I I I 1 2 Establish Protect Goals I II 1 I I 1 3 Key Progress Review Meetings • • • • • ■ I e a I a 1 4 Formal Progres Reports •I • • • • • • e •) •1 e • a eI e • ■ ■1 a eI • a a o 2.0 Well Suitability Evaluation I - I I 1 I 3.0 Hydrogeologic Characterization II I 4.0 Water Quality Compatibility Evaluation 5.0 Permits and Water Rights I . I 6.0 System Integration 7.0 ASR ImplementationI - — 8.0 Phase I Report II I 8.1 Additional Water Level Monitoring(To be conducted by City) PHASE 2 PILOT TESTING I 1.0 Permitting and Water Rights 2.0 Wellhead Modifications/New Well I 3.0 ASR Pilot Testing I Cycle 1 Shakedown I I I Cycle 2 1 Recharge I 2 Storage I I I _ 3 Delivery I I I I -- 4.0 Pilot Test Report I I FIGURE ES-2 Proposed ASR Development Schedule 2001 J 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 �;0A * W1,t,ash asp-� uv r Sz r..., .' :",„ A +F .� ,�'M,-, „•,.;v��TM d? -^'.. =':3x. .^'..,.:".s° jyE %; • r �' 0. -,-.----z;. c \.�;',_ - J, �' :> I1 1I1Q,ii(%i•k "''' zso _ p' ,1_3, y .- •a •° •irnrzr. • II • t • ;� - `eoo`\N'---•••--------'•----__--7-----)- )=\ kj.( \j �- `z, •O rf•t i `t._ T T I - ', •a1k4,C'l�-_w.�, :i"'�'-,- EXPLANATION :� i ' '. 1) �riS, flll I .,g �.1 `, - =„....--_-_,,vs>' ...'ca`: j 1 1, ,°!T.• n «.\ • 150 a_ r � £ 1 �' _ Summer~ 1 ti 4,.•�• -tea Well No.1 • City of Tigard Well ,C;6-. - — / [. ,5,`•Jt. ,a ' I �. .. _ l �• , • ,y r.' t ` •<"--<c-•--"-:--- > % o \ 1( }, Lake Par (/ L 0' - ,�, y `, •1i•------:---,•.------ • :-- • ��ie i .� v ' •I' \ ; 1 �' • �� 'S4 •.1. �j� - Potential ASR Well sites l -, 0--6--------,:-_-..b _ _',__,W---_,.•:•-•;•/01 �)-.\` , �f 4' 1 • -'i Ji( _ li \ .I t'''': ''-' i').. it 'S•!,- •+i45-.•-+j,.. .�. �y. .e , ��.% t• 'I• 4J 4-' • \ ��_ •;l . ,/ 1 _ ) s i, .... . ri �i•// • . 1. �j� Possible ASR Well Sites • T at r•_ tt �;ti ° 'r,I' j o\ . �' 1 _ -- '•--^fs.' ice_-• _- �� • `, �aoi �2' _ --7---T� \t'.�, •?l4; ^.'f' ; _ „ri. 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"r �.F. \�- _ y ' / Y - - � •� 1;f. � \ -- -• ' y�;,. ..,Y� yy, JR.Fw 'a - �� '` "'' r- -�'�� Y%£- -.. ` f` .r, - ,j 1, •;.`"ti 1( :!,-,:1_,_, - / r • i _ :...0 =r =< - _ ~ J t' ,- Ia / r. l' mayo ,. v` �- $ `X o� \t�;d( 4l';j '\'; %p, I _ r. ----X,. ,. _ A.� : :_�-- mil Sp wl ,�,' ,r: /-- _ '-1!• `:ti; l�P `4"/11 l"/ - - -''' /j`/` ; _ ',C .ter _ , s- .♦ •Sr6-\-1--,....,-L-5--_---,--;--__ '. [ ).� 4.t..,•,1 _ -.(s.r ��' �JO _ �Ai i':>/, _ til• i `- , 6.' `:+: pr - �( ,i, r; •_-isi.'` ,i `i:s: %� -- �a % � - -\ ':._ `. � ' / • - .,, �I -- j tl..- _ • :N�• � 12 /�' i• _ - - - - rn / - _ - ^O; :,..41:-.).- 'tip` a-'✓•� , 7 �*f. s' "�7�.` Y 4'�',> '.t- — . • 4 �> ': r' s i ,xr. Proposed z • ` 7.%:f _ 4�tt- h ) I:• . • • p =%,,; .r::, r j ::�•p► •,._ �-/ 1 1 ''• • fit, 1 :: f Reservoir 5 ti �: µ _J o _ a - .tt' E,'1 r•' 3 • {� +� �_ . As !:1,---'7-,.,:!:" 1\•: b 't . I is 'i nG. .r)i� li' -- i8 i .•. a qtr } SII I ' o- .o \_/ -!r, i k\\'�.�:- r=3s q • , '... ty.max' :; a^.. 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'0'111 - - - .',.tuber ELS,Ep-- �_ _-- -=l_—, l __ t _ '- -� __.,f 'r ��1T`!" _ y'- '�_ _� �, ::ie 'II! FIGURE EF ► POTENTIAL ASR WELL LOCATIONS pnr,JEt.T NO (-,1--;1419 006 DRAWING NO 9465- DATE 05/24;01 DRAWN BY /BF ;()Icier Associate:-