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HomeMy WebLinkAbout03/20/1989, C-1 - AGENDA MEETING AGENDA DATE ITEM # Cr ` A G E N D A WHALE ROCK COMMISSION MEETING THURSDAY, MARCH 23, 1989 HEARING ROOM CITY HALL - 990 PALM STREET SAN LUIS OBISPO, CALIFORNIA 12:00 Noon Commissioners lunch at Sebastian's. Chorro at Monterey adjacent to Mission Plaza 1:30 p.m. Commissioners reconvene at City Hall, Hearing Room 9 990 Palm Street, San Luis Obispo ROLL CALL Commissioners: Ron Dunin, City of San Luis Obispo Commission Vice Chair John Dunn, City of San Luis Obispo, Commission Secretary Doug Gerard, California Polytechnic State University Commission Chair Carlos Madrid, California Deparment of Water Resources Carmen Salvato, California Mens Colony Bill Statler, City of San Luis Obispo --------------------------------------------------------------------- PUBLIC COMMENT PERIOD (5 Minutes) The Whale Rock Commission will receive public comment on items of interest to the public within the Commission's jurisdiction. As a general rule, action will not be taken on issues not listed on the agenda. Staff will generally be asked to follow up on such items at the discretion of the Chair. Written material is also encouraged. 1. Minutes - Approval of draft minutes of the November 9, 1988, meeting. 2. Award of contract to Serene Construction for installation of well and appurtenance facilities for CAWO. 3 . Policy Statement regarding emergency water exchange. 4. Consideration of intertie agreement between City of Morro Bay and the Whale Rock Commission. 5. Receive report of Safe Annual Yield and Coordinated Operations Study for the Salinas and Whale Rock Reservoirs. 6. Approval of study of Whale Rock Reservoir Pumping Capability and Conveyance System. ODraft Minutes Whale Rock Commission Meeting Wednesday, November 9, 1988 Hearing Room, City Hall - 990 Palm Street San Luis Obispo, California ;o ommission Members Present: I Ron Dunin, City of San Luis Obispo, Commission Vice Chair John Dunn, City of San Luis Obispo, Commission Secretary Carlos Madrid, California Departmnet of Water Resources Carmen Salvato, California Mens Colony William Statler, City of San Luis Obispo Dmmission Member Absent: Doug Gerard, California Polytechnic State University, Commission Chair as ity Staff Present: Barry Daffern, Water Supply & Distribution Supervisor Hal Fones, Utilities Engineer GWilliam T. Hetland, Utilities Director Allen Short, Water Treatment Plant Supervisor Jane Johansen, Recording Secretary )11 Call Lce Chairman _Dunin called the meeting to order at 1:30 p.m. and ay ivited comments from the audience in accordance with the Brown Act Ltems not on the agenda) . There was no public comment. :TION ITEMS Draft Minutes from August 22 , . 1988, Whal.e_ Rock. Meetinq. Commissioner Madrid made a motion to approve the minutes as , received, seconded by Commissioner Salvato. Motion carried. ty Consideration of Morro Bay's request for emergency water supply. r Bill Hetland explained the request of Morro Bay and the approach r they are taking in coming to the Whale Rock Commission. He commented that hardware is in place from past years when excess water was previously provided to Morro Bay, and he reviewed the actions the City of Morro Bay has taken to reduce their water use. The proposal is for the Whale Rock Commission to loan Morro �• Bay up to 50 acre feet of water to be replaced at such time as the aquifers are recharged. The. replacement would take place by -means of pumping back into the reservoir or pipeline to go back S. o the Whale Rock Commission agencies. �'f I Whale Rock Commission Meeting, November 9, 1988 O Draft Minutes Page 3 Commissioner Dunn asked what guarantees the Whale Rock Commission would have that loaned water would only be used in a true emergency situation. Hetland clarified that staff is recommending that the Commission and Morro Bay enter into an agreement to provide an emergency supply, by authorizing the Whale Rock Commission Chairman to implement the program; to administratively call and hold a Whale Rock Commission meeting involves too much time to respond to an emergency situation. Nick Nichols explained that his measure of the true emergency situation, would be the day Morro Bay could not fill their water tanks overnight. In the winter months, they have enough storage tank capacity to provide a 48 hour supply of water. If they couldn't do that, that is when they would have to ask, can we open the valve. In response to a question from Commissioner Madrid, Nichols commented that any agreement negotiated should probably contain a provision where Whale Rock Commission staff .would verify the need. In response to a question about reference. to both 50 acre feet O and 100 acre feet in the Morro Bay letter, Nichols indicated that both references should be for 50 acre feet. Bill Hetland clarified that authorization is only being asked for up to 50 acre feet, which we believe to be a two month supply; this .is not an on-going situation. Nichols commented that there is no "magic" about the figure 50; it is based on previous experience. He also indicated that requesting water from the Whale Rock Commission is not the only course of action being pursued by Morro Bay. The City Council has three plans being pursued at this time. However, with permits in place with the Whale Rock Commission, this seems the more expeditious plan to pursue. Donald Smith expressed concern that Morro Bay has had to come to the Whale Rock Commission five times in the last eight years, is not taking measures to control their growth, isnot drilling wells to meet its demands, etc. If this is another dry winter, how can Morro. Bay repay us? Bill Hetland commented that we will enter into a legal agreement binding on the Whale Rock Commission and on the City of Morro Bay to make payments back to us. In part, we have to rely on the professionalism of both parties involved. Morro Bay knows the situation they are in and the O �!,/�'S Whale Rock Commission Meeting,. November 9, 1988 Draft Minutes Page 4 obligations they are commiting to and that additional rationing earlier than they had anticipated, activating agricultural wells, are among the alternatives for them to develop additional sources. This is to help them in a temporary emergency situation. Nick Nichols agreed that they are hoping for authorization for the staffs to negotiate a contract for contingency plans, and that Morro Bay does not want to jeopardize the relationship they have with the Commission. Pea Pinard, City of San Luis- Obispo Councilwoman, indicated she was speaking as a citizen of San Luis Obispo, concerned that not only do we not have excess water to sell, but we do not have water to give or loan. San Luis Obispo is also at a critical point in our water consumption. Clint. Milne, County Waterworks District #8, suggested that an emergency inter-tiebetween agencies (Cal Poly, Morro, Bay, San Luis Obispo) would be a good idea as a back. up. This is a method C used in several areas in the county as an emergency back up in case a major transmission line should be down, such as in the past when San Luis Obispo was unable to deliver Whale Rock or Salinas water to CMC. He believes it should be considered in each agency's own interest, as well as .in the interest of helping a neighbor. Commissioner Salvato recalled that when CMC did have a line break, such a tie-in with Morro Bay could have been to CMC's benefit. Commissioner Statler asked if there is a moderate level of drought, what is both the willingness and the ability of Morro Bay to repay a loan of water. Nichols indicated that 16-17 .inches of rainfall in the winter would give them ground water to carry them through the summer. They do anticipate having well capabilities to return well water to the Whale Rock Commission in winter months. Pea Pinard expressed concern that the Whale Rock Commission needs to determine what constitutes an emergency. In response to a question from Commission Dunn', Nichols indicated Morro Bay's pumping capacity is still in excess of its needs; it would take another two wells going out• of service before they would be in an emergency situation. C�� Whale Rock Commission Meeting November 9, 1988 Draft Minutes Page 5 Commissioner Dunn expressed the importance of having a policy in place beforehand in order to address an emergency situation. At present the Commision only has a partial policy. We should remedy that, as we can expect other agencies to also request water at some point, and we want to be better prepared next time. He indicated that there is disagreement among the San Luis Obispo City Council aboutthis, since we are in a similar situation of a water shortage and asking our citizens to make sacrifices. Nick Nichols emphasized that Morro Bay is asking for an agreement to borrow water if they need it, as a contingency plan; asks that the Commission give its staff authority to set up a contingency agreement. Commissioner Dunin indicated that, speaking for the San Luis Obispo City Council, if the time comes that Morro Bay is in big trouble regarding its water situation, San Luis Obispo will be in bigger trouble. Water for both communities comes from more or less the same watershed. Motion: Commissioner Madrid moved that the Whale Rock Commission authorize its staff to work with City of Morro Bay staff to develop a draft agreement to bring back to the Commission for approval, for providing water on an emergency basis; the agreement also to contain authorization for the Chairman of the Whale Rock Commission to approve release of water, not to exceed 50 acre feet at a time, without additional Whale Rock Commission authorization. The motion was seconded by Commissioner Salvato. Commissioner Dunin indicated he will vote against this motion, based on the difficulty he sees for the SLO City Council to explain this action to its citizens when SLO is in an undeclared emergency itself. It would be less of a problem if the Whale Rock Commission had available an emergency agreement between its member agencies to address contingency for the water and whether or not it could be made available to any outside agency if the water level in the reservoir was at a certain level. The motion carried 4:1, with Commissioner Dunn dissenting. Commissioner Dunin indicated the following concerns he sees that should be addressed in such a draft agreement: (1) verify need, (2) put the emergency interim agreement in- place before making a OWhale Rock Commission Meeting November 9, 1988 Draft Minutes Page 6 contract arrangement with Morro Bay, (3) establish the critical point (level in the reservoir) at which no' water could be sold or loaned, (4) have a written guarantee that water will be replaced, even if the drought worsens. Pea Pinard indicated she would add that the draft agreement also define the word "emergency" . Commissioner Madrid again emphasized that we are talking about a draft agreement that will be reviewed again. He felt that the inter-tie proposal is good one, but we have to go beyond that. Clint Milne indicated he would be happy to provide a sample of the emergency inter-tie agreement currently in use by other agencies in the county. He stated that these agreements all address short-term emergency situations. A second motion was proposed. Motion: Commissioner Dunn moved that Whale Rock Commision staff prepare a policy statement addressing the loan of water, for consideration at the next meeting. The motion was seconded by Commissioner Statler and approved by unanimous vote of Commission members present. 3. Aipproval of Coastal Streams Storage and Diversion Proiect contract with Leedshill-Herkenhoff. Inc. Hal Fones _presented background information regarding the feasibility study, aspects of the environmental impact report, and proposed financial and institutional arrangements. At this point, concerns of the State Department of Fish and Game require being addressed, including in-stream studies which will raise the cost of the EIR from $118,000 to $167,000, and will require that we have an "average winter". Randy Benthine of Fish and Game, was introduced and explained the concerns and policy of his department. (1) Regarding the draft scope of work, as proposed it is a good step toward what impacts will be, and although at this point he doesn't see additional work necessary, it is a possibility as new information becomes available. (2) Fish and Game doesn't endorse projects; if it is determined there is substantial impact to fish or wildlife that can't be mitigated, Fish and Game will oppose the project. (3) C� Whale Rock Commission Meeting November 9, 1988 Draft Minutes Page 7 It is important to get all resource agencies involved: Marine Fisheries, Environmental Protection Agency, State Water Rights, Regional and State Water Quality Control Boards, Fish and Game. (4) In developing the project description, it could be more clearly defined in the scope of work (should not be addressed in "alternatives" section of the program) . The chairman opened the item for discussion. Commissioner Salvato indicated that regarding dividing up the project, he has some ideas about the EIR that he would like to share with staff. Commissioner Statler emphasized that areas that are not of concern to Fish & Game, such. as who pays and who gets how much water, should be addressed as soon as possible. Commissioner Salvato agreed that we need to resolve up front the issues that can be resolved at this time. Statler felt that work could be scheduled as soon as it can be agreed upon how a component part of the study can be moved forward on. This was the concensus of all commissioners. Regarding Chorro Reservoir as an alternative, Hal Fones indicated it is small and of minor significance. Donald Smith felt the Chorro Reservoir should be considered a major alternative, and the EIR should also consider Salinas Reservoir and state water -- all alternatives should_ be reviewed. Randy Benthine indicated that the original application included eight streams; this EIR is for study of the four most northern streams, and. not including Chorro Creek. If Chorro is to be considered, the EIR will have to be modified. The other four streams are under the application, but not currently covered in the EIR. He suggests that this be explored, as it is a concern of his department. Commissioner Dunin felt the project can be killed by extending its EIR. Randy Ben_thine explained that his question is that the applciation is for eight streams and that the Commission has not withdrawn the four it does not plan to pursue. The State will object to the EIR if the study goes ahead with those four in it. On the other hand, if they are to be part of the application, they -have to be fully considered. OWhale Rock Commission Meeting November 9, 1988 Draft Minutes Page 8 Hal Fones stated that based on the feasibility study, the four inland streams were not considered productive. We originally considered studying all eight streams, but this did not seem feasible because we would then have to also consider Morro Bay and the tidelands. Nick.Nichols indicated that the City of Morro Bay filed water application rights on all eight streams, then it was the desire of the Whale Rock Commission staff and Morro Bay to pursue only the four northern-most streams. We have requested Leedshill-Herkenhoff to give us an estimate of the cost of the EIR if the four additional streams are included. Randy Benthine commented that the project right now is development of a water source and how to get it. If you are locked into four streams, you will develop a certain limited amount of water. Bill Hetland reviewed that the Commission has gone through a O number of steps to get to the point we are- at: have done the feasilibity study on a specific project; now we are having to modify that as a result of input from Fish & Game; there is always a potential for a project to change. We can come back to the Commission; have to sort out how many streams to go ahead with. Clint Milne suggested that there is provision on the books whereby the Commission could request the Department of Water Rights to file application on behalf of the local entity; this would give the application a number, but we don-t have to necessarily develop the project, which would mean we wouldn't have to have an EIR until we have a project. Our water right seniority would be established, however. He recommended the Commission look into this further, as it affects the four streams that we did not want to go ahead with at this time. Motion: Commissioner Dunn moved to continue the Coastal Streams Diversion. and Storage Project, approve the contract with the consultant, with the addition as recommended by the staff to have a complete EIR. The motion was seconded by Commissioner Statler. In discussion it was clarified that this supercedes the previous action, due to scope of work changes and increase in costs. Nick Nichols indicated that the Morro Bay City Council will consider this same thing at its meeting this coming Monday. The motion Gwas approved by unanimous vote of Commission members present. Whale Rock Commision Meeting November. 9, 1988 Draft Minutes Page 9 4. Consideration of request to renegotiate the Cayucos Area Water Users contract. Bill Hetland indicated that Mr. .George Brett of Cayucos expressed interest to change the contract so that Cayucos Area Water Organization might be able to realize an increase of water from Whale Rock Reservoir and groundwater below the reservoir. Benefit to the Whale Rock Commission could include elimination of the clause requiring us to provide 100 acre feet per month to the CAWO. We have had difficulty meeting that maximum per month. We have done studies and work on this and at the last Whale Rock Commission meeting, we were charged to proceed with developing a well. George Brett indicated that he was appearing on his personal behalf and not representing any group or organization. He presented figures to the Commission (copy attached) . His idea is to pump the 600 acre feet of water the CAWO is entitled to, directly from the reservoir. In addition, the CAWO would have the right to pump whatever groundwater from the well field that they could; this amount is unknown, but estimated at 100 acre feet. In return, Whale -Rock- may delete the maximum month clause. A water treatment plant may be required which, perhaps, water purveyors (CAWO) could pay for all or part 'of.. All of this would imply specific concessions from the CAWO to the Whale Rock Commision. His question is, is this feasible, is acquisition a possibility, and would the Whale Rock Commission support this if it is pursued? Clint Milne indicated that he has no problem with these suggestions being brought before the Cayucos Area Water Organization. Bill Hetland indicated that the Commision isto provide up to 600 acre feet of water and if they can't provide that requirement in rate and quality, they have to provide treatment. Commisioner Dunin stated that the Commission can not negotiate with a private citizen, can only express it's feelings on the matter. Motion: Commissioner Statler moved that at such time as the Cayucos Area Water Organization agenices approach the Whale Rock Commision to initiate negotiations, the Whale Rock Commission staff will be C' Whale Rock Commission Meeting November 9, 1988 Draft Minutes Page 10 authorized to do so. The motion was seconded by Commission Dunin. In discussion, Commissioner Dunn expressed concern that this could be a difficult and time-consuming process, with the cost-effectiveness and potential gain in question. Bill Hetland stated again that we have had difficulty meeting the maximum peak rates that the Cayucos organizations have asked of us over the past few years. In putting in the well, we hope to meet the peak delivery rates for the short term. If the well does not meet their peak rates, we may have to come up with a solution and may approach this proposal' as an alternative. For now, it seems a bit premature because we don't have the well in. Commissioner Dunn felt there is sufficient potential benefit to both parties, but agreed with Hetland that at the present time it is premature to pursue this, in addition to requiring valuable staff time, which he feels Hetland will not be able .to afford in the next few months. Clint Milne also agreed this would be premature at this time, however, he indicated that the CAWO have a consulting engineer looking at possible sites for a water treatment plant. C Commissioner Salvato proposed modifying the motion to read- ". . .pending ead " . .pending CAWO approaching the Commission and pending testing of the new well." At this time,. Commissioner Statler withdrew his motion, and Commissioner Dunin his second. Commissioner Dunin then instructed staff that until usabliity of the well is known, no action would be taken. on. this matter. There being no .further business to come before the Comm_ ision, Chairman Dunin adjourned the meeting at. 3:20 p.m. Recording Secretary, Jane Johansen C' _ MEEnN6 DATE March 23, 1989 WHALE ROCK OMMISSION REPORTMEM NUMBEFi: FROM: William T. HetlandIA: Allen Short 4F> Prepared by: Barry Daffern Utilities Director Water Division Manager Water Supply Supervisor SUBJECT: Award contract to Serene Construction in the amount of $64,333.50, for installation of well and appurtenant facilities for Cayucos Area Water organizations BACKGROUND: During the last five years the Cayucos Area Water Organizations have experienced problems involving the entrainment of air into their water systems. This is due to higher pumping demands which lower the aquifer to a level which allows air to be drawn into the pump along with the water. It should be noted at this time that County Water Works District No. 8 has not experienced the air entrainment problem that Morro Rock Mutual Water Company and Paso Robles Beach Water Association have experienced. under our agreement with the Cayucos Area Water Organizations, the Commission is obligated to furnish up to a maximum of 100 acre feet per month. Under our current operational practices, we are not able to do that because of the air entrainment. In August of. 1987, the first civil engineering investigation into the air entrainment problem was conducted by the firm Lawrance Fisk and McFarland, Inc. (LFM) . It was revealed by their investigation that the past practices of dredging the ponds to allow better percolation and recharge has reached its maximum effectiveness. . However, the owners of the land where the ponds are located will no longer allow dredging. They fear that they will lose valuable farm land by the continued dredging practices. It was recommended by LFM that the Whale Rock Commission authorize the drilling of additional test borings to better identify the Old Creek Basin and aquifers, and to determine the effectiveness of the percolation ponds. In April 1988, Mr. Timothy S. Cleath, engineering geologist, who performed part of the LFM investigation, was retained by the Whale Rock Commission to make additional borings in order to identify the Old Creek Basin aquifers. Cleath's report identified the limits of the aquifer. It showed that the existing percolation ponds are along one edge of the aquifer; was not the most effective location for providing water to the existing well field. The report also identified some additional well sites that could help the Commission meet its obligation toward the Cayucos Area Water Organizations. After having identified the aquifers, both the LFM and Cleath reports recommended we make plans for more permanent improvements, such as relocation of existing wells, expansion of percolation ponds or ` acquisition and use of the Mainini well. J I ,--.,,WHALE ROCK COMMISSION REPORT page 2 award contract As a result of these reports, the Whale Rock Commission authorized staff to pursue design of an additional. well at its June 15, 1988" meeting. John L. Wallace and Associates was retained for design and technical services relating to installation of a new well. On September 8, 1988, the City Administrative officer approved agreement for design and technical services relating to installation_ of well. On January 21, 1989, staff advertised for bids. Bids were opened on February 9, 1989. The results are shown on the attached bid summary sheet. Serene Construction was the low bidder with a bid of $64,333.50. The Engineer's Estimate was $56,595.00. FINANCIAL IMPACT: To accommodate this project, money from Whale Rock's undesignated reserves is to. be used. Base Estimate $57,658.00 Contingencies - 10% 51766.00 Construction Engineering & Surveying - 5% 3 ,171.00 C Total $66,595.00 Conseauences of Not Taking Action: 1. Continuation of air entrainment into the water system. 2. Continuation of chlorine injector problems, resulting_ in the inability to disinfect the water system. 3. Continuation of not being able to meet contractual agreement- of 100 acre feet per month. 4. Continuation of congested well field. Action Recommended: Award the contract to Serene Construction, and authorize the transfer of money for "Construction of a well and Chlorination. Facility, Whale Rock Commission Job No. 61-3." Approved: Whale Rock Commission Chairman Finance Director City of San Luis Obispo Whale Rock Commission Secretary Ut eslDirector City of San Luis Obispo cao-cawo/util '19 8 9 WHALE ROCK COMMISSION REPORT ME'""° FROM: William T. Hetland - Prepared by: Allen Short Utilities Director Water Division Manager SUBJECT: ----- - _ _ Policy Statement Addressing the Loan of Water BACKGROUND: At the November 9, 1988 Whale Rock Commission meeting the City of Morro Bay requested that the Commission consider their request for a loan of 50 acre feet of water. This loan would be temporary and be replaced at such time as the aquifers were recharged. The replacement would take place by means of pumping water back into the Whale Rock Reservoir through an existing intertie. The Whale Rock Commission did not have a policy statement in place in order to address requests for an emergency water supply loan or exchange. The Commission at the November 9, 1988 meeting directed Staff to prepare a policy statement addressing, on. an emergency basis, the inter-agency sale or transfer of water. POLICY STATEMENT: The Whale Rock Commission has developed the Whale Rock Operating Policy Statement which idenifies participating agencies entitlements and storage rights. To be consistent with the Whale Rock Operating Policy Statement each participating agency can independently loan, sell or transfer water at its independent descrition. The definition of an emergency or -hardship would be defined by each individual participating agency. The working arrangement between , each agency would not require the Whale Rock Commission approval or involvement providing it is consistent with the other Whale Rock policies. However, the loan, transfer or sale of water would require a legally binding agreement between the two parties. The participating agency will notify the Whale Rock operations staff, in writing, at least 48 hours in advance of needed deliveries. policyst/cas MATING DATE- March 23, 1989 WHALE ROCK COMMISSION_ _ _ REPORT '�'""u �' FROM: William T. Hetlandtl Prepared by: Allen Short (jQ Utilities Director Y• Water Division Manager SUBJECT: Intertie agreement between City of Morro Bay and the Whale Rock Commission BACKGROUND: The Central Coast is facing a third consecutive dry year. Reservoir levels and ground water levels are declining to a critical stage. The City of Morro Bay was facing the possibility that they could not refill their storage reservoirs within twenty four hours. As a result, staff is looking at a number of short term alternative solutions to adequately supply the residents of Morro Bay. One of the short term solutions is the reinstatement of the intertie. agreement between the City of Morro .Bay and the Whale Rock Commission. On November 9, 1988 the Whale Rock Commission directed and authorized its staff to work with the City of Morro Bay to develop an intertie agreement. This proposed policy would allow the inter-agency sale or transfer of water on an emergency basis. This would be accomplished through. the existing intertie between the City of Morro Bay and the Whale Rock water systems. C On January 31, 1989, the San Luis Obispo City Council voted not to support the selling, exchange, or transfer of water to the City of Morro Bay, on an emergency basis. Recommendation: Because the San Luis Obispo City Council voted not to support the intertie agreement, staff has no recommendation. agendal/.cas AGREEMENT TO PROVIDE AN EMERGENCY WATER SUPPLY Agreement is made and entered into this day of 19 , by and between the .Whale Rock Commission (hereinafter referred to as. the "Commission", the City of Morro Bay) (hereinafter referred to as the "City". ) WITNESSETH: WHEREAS, the Commission operates a surface water reservoir known as and hereinafter referred to as "Whale Rock Reservoir"; and the City operates a groundwater system; and WHEREAS, the Whale Rock Reservoir water entitlements belong to the City of San Luis Obispo, California Mens Colony, and California Polytechnic State University; and WHEREAS, the Commission-owned transmission main serving the City of San Luis Obispo, California Mens Colony, and California Polytechnic State University lies in. the proximity of the Morro Bay water system; and WHEREAS, The Commission and the City each operate and maintain water systems in the close proximity of each other in the Chorro Creek Basin in the County of San Luis Obispo, California; and WHEREAS, on May .25, 1964, the Board of. Supervisors of San Luis Obispo County, sitting as the governing board of San Luis Obispo County Waterworks District No. 2 (hereinafter referred to as 2 - "District") by Resolution No. 271-64 did agree to negotiate an agreement with the Commission for the purchase of water and did authorize the installation of a connection facility between the two said pipelines; and WHEREAS, on September 17, 1964, an agreement was executed between the Commission and the District wherein the Commission granted to the District a "License" to operate and maintain a connection facility between the two said pipelines, and to provide up to 300 acre feet of excess water, said license to .be in effect until GNovember 30, 1964; and WHEREAS, in November 1964 the District's interest in said agreement was transferred to the City after its municipal incorporation; and WHEREAS, in 1972 chlorination facilities were installed at the connection facility by the City at the City's expense; and WHEREAS, said agreement was extended on an annual basis through June 30, 1980, at which time the Commission declined to further renew the agreement; and G 3 - WHEREAS, the purpose of this Agreement is to provide for the ability to supply water during periods of emergency water shortage, between Commission and the City; and WHEREAS, it is in the public interest that such an interconnection be maintained, enabling the two agencies to supply each other water on an emergency basis. NOW THEREFORE, IT IS AGREED by and between the parties hereto as follows: 1. Title to improvements. Title to, and ownership of the existing water service connection and all appurtenances constructed and appended thereto as shown on the revised and updated "as-built" drawings shall remain vested with the City. 2. Maintenance of improvements. The City shall. maintain the existing water service connection and all appurtenances constructed pursuant to this and previous agreements. The costs of maintenance of such improvements, including the costs of metering, and any other liability or costs associated with performance under this agreement shall be the sole responsibility of the City. 3. Emergency water supply. Any water furnished hereunder from either party to the other is intended to mitigate temporary shortages of an emergency nature in the water supply of the party receiving the water, and shall not be construed to be either an ongoing or permanent supply of water. Either party may request an emergency water supply at such time as the following conditions exist: 3..1 An Emergency exists in the City when the total system storage capacity cannot be refilled within a twenty-four (24) hour period. As part of the emergency declaration the Morro Bay City Council must declare an emergency prior to the requesting of Whale Rock Reservoir water. If not already imposed, such O - 4 - declaration shall include the imposing of an immediate temporary limitation on the issuing of new building permits which would require the all of new water service. Such temporary limitation will be removed when the City Council determines the emergency condition has passed 3.2 An Emergency exists with the Commission when the Whale Rock Reservoir contains less than a two (2) year supply in storage or when the commission has the inability to deliver water to its existing customers. As part of the emergency declaration the Commission must declare an emergency prior to the requesting of City water. 3.3 Any water furnished hereunder is intended to mitigate temporary shortages of an emergency nature in the water supply of the party receiving the water and shall not be construed to be an ongoing or permanent supply of water. This agreement and the furnishing of G water hereunder does not and shall not confer upon the party receiving such water any vested or permanent right, title or .interest in or to such water or water entitlement or to any water or water entitlement belonging to the party furnishing the water. 3.4 Notwithstanding any other provision of this agreement, either party may at any time and for any reason refuse to furnish, or reduce or cease the furnishing, either temporarily or permanently, of emergency water exchange between the parties. 3.5 The parties agree that it is the intent of this agreement to allow the exchange of water at the existing point of connection because it is convenient to do so at this location. Neither party shall be obligated or required to provide water from a source in a different watershed (e.g. Morro Creek underfloor or Salinas Reservoir) under this agreement. 3.6 Theparties agree that any refusal, reduction or cessation, either temporarily or permanently, in the supply of emergency water exchanged hereunder will not cause or create any irreparable injury or damage to the affected party despite the fact that such party may have expended money or made other promises in the expectation that an emergency exchange supply of water would be C available hereunder. 5 - 3.7 The designated representative of the City or the Commission shall each have the right to honor an emergency water supply request as set forth in paragraph 3.1 or 3.2 under the terms of this agreement. Within twenty-four (24) hours after either party has declared the emergency water supply request, the designated representatives of both parties shall meet to determine supply availability per paragraph 3.4 and to determine whether the emergency flow should commence. If it is agreed to commence the emergency flow, said flow shall begin within eight (8) hours of the meeting. A written notice shall be hand-delivered to the designated representatives of the other parties, within twenty-four (24) hours of commencement of flow. 3.8 Within ten (10) days of the execution of this agreement, both parties shall designate in writing a designated representative for the purposes of "this paragraph. This designated representative may be substituted by any party from time to time in writing to the other parties. 3.9 In no event shall the party receiving water hereunder permit such water to be used on any land ` outside its boundaries, or for any purpose beyond -its ordinary uses unless such party has the prior written consent of all the parties to this agreement. 3.10 Payment for supplying water hereunder shall be on an exchange basis of equal volumes of water. Water shall be returned to the supplying party at the borrower's earliest opportunity by arrangements with the designated representative set forth in paragraph 3.2. Under no circumstances shall such water be returned later than one (1) year from the date the borrowing party ceased receiving water unless different terms are agreed .to in writing by the parties involved. 4. No guarantee. . The parties to this agreement do not in any manner warrant or guarantee the quality, quantity or rate of delivery of the water to be furnished hereunder, or that said water is fit for any particular .use or purpose. The receiving party takes such water on an "as is" basis.. 5. Responsibility beyond point of authority. After the water has passed the point of delivery identified in the approved plan and specifications thereby entering another party's water system, neither the party nor parties delivering such water l nor their officers, agents, or employees shall be liable for J the control, carriage, handling, use, disposal, distribution or changes occurring in the quality of such water supplied to the other party or for claim of damages of any nature whatsoever, including but not limited to property damage, personal injury or death, arising out of or connected with the control, carriage, handling, use, disposal, distribution or changes in the quality of such water beyond said point of delivery. 6. Term. This agreement shall become effective immediately upon execution by all of the parties hereto and shall remain . in effect at all times thereafter unless terminated as provided herein. 7. Termination. Any of the parties, may terminate this agreement at any time, without cause, by giving two (2) months written notice to all the other parties. 8. Indemnification. Either party and their officers, agents, and employees indemnify either party from any and all claims, demands, liability, costs, expenses, damages, causes of action and judgments for loss or damage to property or for death or O injury to person, in any manner arising out of this agreement of out of the performance or attempted performance of the provision hereof, including, but not limited to, any act or omissions to act or active negligence by either party, excepting only such injury or death as may be caused by sole negligence or. willful misconduct of either party's officers, agents, employees or independent contractors directly responsible to either party. 9. No assianment without consent. Neither party shall have the right to assign or transfer this agreement, or any part hereof, without the prior written consent of all parties to this agreement. 10. Bindina on successors in interest. All provisions of this agreement shall be binding on the parties and their executors, administrators, assigns and successors in interest. 11. Effect of waiver. Any party's waiver or breach of any one term, covenant, or other provision of this agreement, is not a waiver or breach of any other term, nor subsequent breach of the term of provision waived. 12. Notices. Unless otherwise provided, all notices required herein should be in writing, and delivered in person or sent by registered or certified maid, postage prepaid. Notices required to be given to the Commission or City shall be C' addressed as follows: 7 - City of Morro Bay Whale Rock Commission 595 Harbor Street c/o City of San Luis Obispo Morro Bay, CA 93442 955 Morro Street ATTN: City Administrator San Luis Obispo, CA 93403 ATTN: City Administrative Officer Provided that either party may change such address by notice in writing to the other party and thereafter notices shall be addressed and transmitted to the new address. IN WITNESS WHEREOF, the parties hereto have executed this agreement as of the day and year first above written. ATTEST: Commission Chairman APPROVED AS TO FORM: by Attorney for the Commission CITY OF MORRO BAY by Mayor ATTEST: City Clerk APPROVED AS TO FORM: by City Attorney O RESOLUTION OF THE WHALE ROCK COMMISSION Ta APPR7M AN AGOM20 T EETk1TM TO VHUE ROCK 03K4ISSION AND THE CITY OF MORRO BAY Ta PFM= AN EMERGMCY MM SUPPLY WHEREAS, the Whale Rock Commission operates a surface water reservoir, and the City operates a groundwater system; and WHEREAS, the Whale Rock Commission and the City of Morro Bay each operate and maintain water systems in the close proximity of each other in the Chorro Creek Basin in the County of San Luis Obispo, California; and WHEREAS, the Whale Rock Commission and the City of Morro Bay have supported each other in times of emergency in the past; and WHEREAS, the Whale Rock Commission and City of Morro Bay desire to enter into an Agreement to provide for the ability to supply Owater during periods of emergency water shortage; and WHEREAS, it is in the public interest that such an interconnection be maintained, enabling the two agencies to supply each other water on an emergency basis, NOW, THEREFORE, BE IT RESOLVED by the Whale Rock Commission as follows: That the Chairman of the Whale Rock Commission is authorized to execute the Agreement to Provide an Emergency Water Supply. On motion of , seconded by and on the following roll call vote: AYES: NOES: ABSENT: the foregoing resolution was passed and adopted this day of , 1989. C 2 - -1—�� ATTEST: City Clerk Pam Voges APPROVED: Water Division Manager Utilities Director res-emerg/WR - MEEING DATE. March 23 1989 WHALE ROCK COMMISSION REPORT M.ANUM Ea C' FROM: William T. Hetland Prepared by: Allen Short Manaster SUBJECT: Safe Annual Yield and Coordinated Operations Study for the Salinas and Whale Rock Reservoirs BACKGROUND: The City of San Luis Obispo retained the firm of Leedshill-Herkenhoff to perform a safe annual yield study on the Salinas and Whale Rock Reservoirs. In addition, the consultant investigated the coordinated use of both the Salinas and Whale Rock Reservoirs.. Attached for your review are the results of the Leedshill-Herkenhoff Coordinated Operations Study. .Also attached for your review is a summary of the document prepared as a Council Agenda Report that was submitted to the San Luis Obispo City Council. RECOMMENDATION: Receive and file report. Staff recommends that no adjustments to the safe annual yield be made at this time. G agenda3/cas MEETING OATE: City Of Sari LUIS OBISPO TEM NUMBER: 1989 COUNCIL AGr=NDA REP®RT From: William T..Hetland, Utilities Director �,t.l J Subject: Coordinated Operations Study for the Salinas and Whale Rock Reservoirs Recommendation: Receive and file report. Direct staff to continue its efforts in maximizing the yield of our supplies and request the Whale Rock Commission begin studies to increase the pumping capacity of its conveyance system. Staff also recommends that no adjustments to the City's safe annual yield be made at this time. SUMMARY The City retained the firm of Leedshill=Herkenhoff to perform a safe annual yield study on the Salinas reservoir and on the coordinated use of the Salinas and Whale Rock Reservoirs. The studies showed a reduction in the iddependant yield of the Salinas Reservoir to 4450 AFY and an increase in the independant yield of Whale Rock Reservoir to 4960AFY. The studies also determined alternative coordinated .yields based on four different combinations of minimum storage volumes for the two reservoirs. At conservative storage volumes of 3000 AF for Salinas and 5000 AF for Whale Rock Reservoirs, the coordinated yield for the City of San Luis Obispo is 7460 AFY or 103 AFY greater than the currently accepted value of 7357 AFY. The coordinated yield can be increased to 8210 AFY, at these storage volumes, by making pumping modifcations to the Whale Rock conveyance system. Staff is also pursuing treatment plant changes and intake modifications at the Salinas Reservoir to increase the flexibility in using that facility. Downstream water use and its impact on the live stream is also being investigated. Staff is recommending we continue to maximize our yields and request the Whale Rock Commission to undertake modifcations to their conveyance system. No changes in the safe annual yield of the City is being recommended at this time. BACKGROUND Salinas Reservoir At the December 20, 1988 Council meeting, staff presented tentative results of a new safe annual yield study on the Salinas Reservoir. The final report was received in January and distributed to staff and the Council. The report concluded that the safe annual yield of the Salinas reservoir has been reduced by 350 acre-feet per year (AFY) to a level of 4450 AFY from the existing 4800 AFY. The reduction was the result of increased siltation in the reservoir due to some large storms we have experienced in the last few years. Staff also indicated that this loss of safe annual yield may be offset by an increase in yield due to the coordinated use of the Salinas and Whale Rock Reservoirs. The major conclusions reached in the study are as follows: 1. Based on appliction of a mathematical regression equation developed by the United States Geological Survey in 1975, approximately 1500 acre-feet of usable storage capacity has been lost to accumulated sediment from the upstream watershed since 1975. Therefore, the current usable storage capacity is estimated to be approximately 21,800 AF. 0,'*11IIVKIII1i 21$ city of san Luis oBispo NiN COUNCIL ADENOA DEPORT O Coordinated Operations Study Page 2 2. The impact of the "live stream" requirement is difficult to determine due to the relative lack of historical data and the possibility of continuously changing conditions along the downstream reaches of the Salinas River. Therefore, hydrologic data related to the live stream releases should be closely monitored and further analysis should be performed once more information is available in order to better understand the impact of the live stream requirement. 3. Based on the revised estimate of storage capacity and the projected impact of the live stream requirement, the current safe annual yield of Salinas Reservoir is estimated to be 4450 acre-feet per year. Coordinated Operations Study The City's consultant, Leedhill-Herkenhoff, has also completed a study updating the safe annual yield of the City based on a coordinated use concept. The Coordinated Operations Study looked at what the yield of the Salinas and Whale Rock Reservoirs would be if they were operated in a managed, coordinated manner. The basic concept is that water from the Salinas Reservoir is used as much as possible because it will fill faster and more often than the Whale Rock Reservoir. Also there is more loss of storage due to evaporation at O Salinas Reservoir and by keeping the reservoir down minimizes the evaporation loss. A preliminary analysis on this concept was performed for the City's Draft Water Management Plan. That analysis estimated that 300 to 800 AFY in yield could be gained. The Draft Water Management Plan used the amount of 500 AFY. Since revised yield models for both the. Salinas and Whale Rock Reservoirs were developed and a new operating policy has been adopted by the Whale Rock Commission, a more thorough evaluation of the coordinated use concept was appropriate. The Coordinated Operations Study used the computer model that was developed in LH Salinas Reservoir study. Four minimum storage volumes of 400, 2000, 3000, and 5,000 AF were used. These amounts were based on a combination of different factors including dead storage, fish habitat, water quality, physical constraints of the reservoir facilities. The safe annual yield of the Whale Rock Reservoir was recalculated based on monthly data instead of annual data as had been done in the 1974 Department of Water Resources study. This placed the Whale Rock analysis on the same basis as Salinas Reservoir. A number of statistical correlations were also done to improve the accuracy and reliability of the precipitation, evaporation, and reservoir inflow input data. This check on the input data showed that DWR overstated the evaporation loses and understated the inflows at the reservoir. The results of this recalculation and revised input data increased the independent safe annual yield for Whale Rock Reservoir from the old value of 4400 AFY to 4960 AFY. This increase of 560 AFY is due to the higher inflows and lower evaporation rates over the critical period. O V r/ 'V- 1101111111111 CTCy of Sdi. Luis OBISpo COUNCIL AGENDA REPORT Coordinated Operations Study Page 3 Coordinated Operations Model The coordinated operations model included four minimum storage volumes for the Salinas and Whale Rock-Reservoirs. They are summarized below.. Minimum Storage Scenario Salinas Whale Rock A 5000 5000 B 3000 5000 C 2000 2000 D 400 500 These volumes represent the lowest possible and a combination of other volumes based on water quality, fish habitat, or reservoir facilities. Scenario A represents a "worst case" posssibility, while scenario D was included to provide consistent comparisons with previous studies. Scenarios B and C are the most realistic. The operations model also showed that at the higher flow rates that hydraulic restrictions existed in the Whale Rack conveyance system. Therefore two different runs were made based 1 on the existing hydraulic capacities and future hydraulic capacities. Additional pumps J would have to be added to the Whale Rock system to meet the future hydraulic capacities. The results of the coordinated operations study are summarized below. The minimum storage volumes for each scenario are identified and the yield for the existing hydraulic conditions and the future hydraulic conditions are shown. City of San Luis Obispo Coordinated Operations Study Min Storage (AF) Coord SAY (AFY) Coord SAY Less Current (AFY) Scenario Salinas Whale Rock Existing Future Existing Future Current 400 500 7357 7357 0 0 A 5000 5000 6860 7810 . (497) 453 B 3000 5000 7460 8210 103 853 C 2000 2000 7800 8580 443 1223 D 400 500 8250 8990 893 1633 II^ CW I�r��a��►�►�III$� � City of san LUIS OBISPO ffijjS COUNCIL AGENOA REPORT C. Coordinated Operations Study Page 4 The safe annual yield for the City under existing hydraulic conditions, ranges from a decrease of 497 AFY to an increase of 893 AFX. Under the most logical scenarios of B and C the yield has increased 103 and 442 AFY, respectively. These increases take into account the revised Salinas and Whale Rock Reservoirs indepentant safe annual yield studies. Scenario B is a conservative approach which is based primarily on water quality considerations. City staff feel that it is possible to treat the water at the Salinas Reservoir to a level of 3000 AF of storage and may be possible to get to the 2000 AF level. The Whale Rock Reservoir has never been drawn down far enough to give staff any I . experience with what the water quality concerns may be at the lower levels. But based on our experience at Salinas we feel that 5000 AF of storage is a conservative level. Both of these levels also meet minimum storage volumes for fish habitat. The hydraulic restrictions in the Whale Rock conveyance system occur when the reservoir levels are down and we are trying to deliver the maximum amount of water through the system. This is because the existing pumps do not have adequate head (ie ability to pump at higher pressures) for the mount of water being delivered. Alternative ways to improve the system may include modifying existing pumps, installing new 'pumps, adding additional O pumps or installing an in-line booster pump station. If these restrictions are resolved, the yield for scenarios B and C would be increase over our current yield by 853 and 1223 AFY, respectively. The consultant is recommending that a study be done to determine the most efficient method of resolving this problem. A yield of 7460 AFY could be supported based on scenario B with minimum storage volumes of 3000 AF for Salinas and 5000 AF for Whale Rock and existing pumping conditions on the Whale Rock conveyance system. This would represent an increase of only 103 AFY. Since the City is still pursuing actions to maximize our yield and will be coming back to Council in May with the City Annual Water Operations Plan, it is not appropriate to take any additional action at this time. I Maximizing the Safe Annual Yield There are a number of actions staff is currently pursuing to maximize the yield of the existing reservoirs. 1. Treatment - The primary concerns at the Salinas Reservoir are the taste and odor problems and manganese levels. Laboratory analysis has shown that these problems can be addressed by the addition of potassium permanganate. Temporary feed equipment and chemicals have been ordered to do full scale testing. This should be on line by the middle or end of February. This will allow us to treat water down to the 2000 to 3000 AF storage level. I C .. r ^I��� i�hlllbp A `I city Of sanlas osi spo _ WMCms COUNCIL ACED_ 1_D_A REPORT Coordinated Operations Study Page 5 2. Intake - Another problem at the Salinas Reservoir is the lack of flexibility at the lower levels of the lake to withdraw the water. By having greater flexibility in the withdraw!, it is possible to choose the level at which the water quality is the best and easiest to treat. Staff is currently investigating the addition of an intake tube which will give us this flexibility. 3. Down Stream Uses - Storage at the Salinas Reservoir is dependent on a live stream being established downstream of the dam. The use of water downstream influences the establishment of the live stream. Staff is investigating the water rights and use along the river. 4. Groundwater - By utilizing groundwater during peak months it is possible to relieve the load on the surface water sources. The groundwater wells currently under construction will help this situation. Those wells will be completed by the end of March. Recommendations Staff recommends that the Council receive and file this report plus direct staff to continue its efforts in maximizing the yield of our supplies and request the Whale Rock Commission begin studies to increase the pumping capacity of it's conveyance system. Staff also recommends that no adjustments to the City's safe annual yield be made at.this time. attachment say2789/n I I City of San LUIS OBISPO MSG Dare February 7, 1989 A A - COUNCIL, AGENDA REPORT ITEM NUMBER C � From: William T. Hetland, Utilities Director, Subject: Coordinated Operations Study for the Salinas and Whale Rock Reservoirs Recommendation: Receive and file report. Direct staff to continue its efforts in maximizing the yield of our supplies and request the Whale Rock Commission begin studies to increase the pumping capacity of its conveyance system. Staff also recommends that no adjustments to the City's safe annual yield be made at this time. SUMMARY The City retained the firm of Leedshill-Herkenhoff to perform a safe annual yield study on the Salinas reservoir and on the coordinated use of .the Salinas and Whale Rock Reservoirs. The studies showed a reduction in the independant yield of the Salinas Reservoir to 4450 AFY and an increase in the independant yield of Whale Rock Reservoir to 4960AFY. . The studies also determined alternative coordinated yields based on four different combinations of minimum storage volumes for the two reservoirs. At conservative storage volumes of 3000 AF for Salinas and 5000 AF for Whale Rock Reservoirs, the coordinated yield for the City of San Luis Obispo is 7460 AFY or 103 AFY greater than"the currently accepted value of 7357 AFY. The coordinated yield can be increased to 8210 AFY, at these storage volumes, by making pumping modifcations to the Whale Rock conveyance system. Staff is also pursuing treatment plant changes and intake modifications at the Salinas Reservoir to increase the flexibility in using that facility. Downstream water C use and its impact on the live stream is also being investigated Staff is recommending we continue to maximize our yields and request the Whale Rock Commission to undertake modifcations to their conveyance system. No changes in the safe annual yield of the City is being recommended at this time. BACKGROUND Salinas Reservoir At the December 20, 1988 Council meeting, staff presented tentative results of a new safe annual yield study on the Salinas Reservoir. The final report was received in January and distributed to staff and the Council. The report concluded that the safe annual yield of the Salinas reservoir has been reduced by 350 acre-feet per year (AFY) to a level of 4450 AFY from the existing 4800 AFY. The reduction was the result of increased siltation in the reservoir due to some large storms we have experienced in the last few years. Staff also indicated that this loss of safe annual yield may be offset by an increase in yield due to the coordinated use of the Salinas and Whale Rock Reservoirs. The major conclusions reached in the study are as follows: 1. Based on appliction of a mathematical regression equation developed by the United States Geological Survey in 1975, approximately 1500 acre-feet of usable storage capacity has been lost to accumulated sediment from the upstream watershed since 1975. Therefore, the current usable storage capacity is estimated to be approximately 21,800 A.F. city of San tins OBISpo COUNCIL AGENDA REPORT '1 Coordinated Operations Study Page 2 2. The impact of the 'live stream' requirement is difficult to determine due to the relative lack of historical data and the possibility of continuously changing conditions along the downstream reaches of the Salinas River. Therefore, hydrologic data related to the live stream releases should be closely monitored and further analysis should be performed.once more information is available. in order to better understand the impact of the live stream requirement. 3. Based on the revised estimate of storage capacity and the projected impact of the live stream requirement, the current safe annual yield of Salinas Reservoir is estimatedto be 4450 acre-feet per year. Coordinated Operations Study The City's consultant, Leedhill-Herkenhoff, has also completed a study updating the safe annual yield of the City based on a coordinated use concept. The Coordinated Operations Study looked at what the yield of the Salinas and Whale Rock Reservoirs would be if they were operated in a managed, coordinated manner. The basic concept is that water from the Salinas Reservoir is used as much as possible because it will fin faster and more often than the Whale Rock Reservoir. Also there is more loss of storage due to evaporation at Salinas Reservoir and by keeping the reservoir down minimizes'the evaporation loss. A preliminary analysis on this concept was performed for the City's Draft Water Management Plan. That analysis estimated that 300 to 800 AFY in yield could be gained. The Draft Water Management Plan used the amount of 500 AFY. Since revised yield models for both the Salinas and Whale Rock Reservoirs were developed and a new operating policy has been adopted by the Whale Rock Commission, a more thorough evaluation of the coordinated use concept was appropriate. The Coordinated Operations Study used the computer model that was developed in.LH Salinas Reservoir study. Four minimum storage volumes of 400, 2000, 3000, and 5,000 AF were used. These amounts were based on a combination of different factors including dead storage, fish habitat, water quality, physical constraints of the reservoir facilities. The safe antral yield of the.Whale Rock Reservoir was recalculated based on monthly data instead of annual data as had been done in the 1974 Department of Water Resources study. This placed the Whale Rock analysis on the same basis as Salinas Reservoir. A number of statistical correlations were also done to improve the accuracy and reliability of .the precipitation, evaporation, and reservoir inflow input data. This check on the input data showed that DWR overstated the evaporation loses and understated the inflows at the reservoir. The results of this recalculation and revised input data increased the independent safe annual yield for Whale Rock Reservoir from the old value of 4400 AFY to 4960 AFY. This increase of 560 AFY is due to the higher inflows and lower evaporation rates over the critical period. tea. I(VMI � City of San LIAS OBISPO COUNCIL AGEN®A REPORT Coordinated Operations Study Page 3 Coordinated Operations Model The coordinated operations model included four minimum storage volumes for the Salinas and . Whale Rock Reservoirs. They are summarized below. Minimum Storage Scenario Salinas Whale Rock A 5000 5000 B 3000 5000 C 2000 2000 D 400 500 These volumes represent the lowest possible and a combination of other volumes based on water quality, fish habitat; or reservoir facilities. Scenario A represents a "worst case" posssibility, while scenario D was included to provide consistent comparisons with previous studies. Scenarios B and C are the most realistic. The operations model also showed that at the higher flow rates that hydraulic restrictions C i existed in the Whale Rock conveyance system. Therefore two different runs were made based on the existing hydraulic capacities and future hydraulic capacities. Additional pumps would have to be added to the Whale Rock system-to meet the future hydraulic capacities. The results of the coordinated operations study are summarized below. The minimum storage volumes for each scenario are ideated and the yield for the existing hydraulic conditions and the future hydraulic conditions are shown. City of San Luis Obispo Coordinated Operations Study Min Storage (AF) Coord SAY (AFY) Coord SAY Less Current (AF1l) Scenario Salinas Whale Rock Existing Future Existing Future Current 400 500 7357 7357 0 0 A 5000 5000 6860 7810 (497) 453 B 3000 5000 7460 8210 103 853 C 2000 2000 7800 8580 443 1223 D 400 500 8250 8990 893 1633 i uVdll l All c17Cy of san tuffs mspo COUNCIL AGENDA REPORT Coordinated Operations Study Page 4 The safe annual yield for the City under existing hydraulic conditions, ranges from a decrease of 497 AFY to an increase of 893 AFY. Under the most logical scenarios of B and C the yield has increased 103 and:442 .AFY, respectively.. These increases take into account the revised Salinas and Whale Rock Reservoirs indepentant safe annual yield studies. Scenario B is a conservative approach which is based primarily on water quality considerations. City staff feel that it is possible to treat the water at the Salinas Reservoir to a level 'of 3000 AF of storage and may be possible to get to the 2000 AF level. The Whale Rock Reservoir has never been drawn down far enough to give staff any experience with what the water quality concerns may be at the lower levels. But based on our experience at Salinas we feel that 5000 AF of storage is a conservative level. Both of these levels also meet minimum storage volumes for fish habitat. The hydraulic restrictions in the Whale Rock conveyance system occur when the reservoir levels are down and we are trying to deliver the maximum amount of water through the system. This is because the existing pumps do not have adequate head (ie ability to pump at higher pressures) for the mount of water being delivered. Alternative ways to improve the system may include modifying existing pumps, installing new pumps, adding additional pumps or installing an in-line booster pump station. If these restrictions are resolved, the yield for scenarios B and C would be increase over our current yield by 853 and 1223 AFY, respectively. The consultant is recommending that a study be done to determine the most efficient method of resolving this problem.. A yield of 7460 AFY could be supported based on scenario B with minimum storage volumes of 3000 AF for Salinas and 5000 AF for Whale Rock and existing pumping conditions on the Whale Rock conveyance system. This would represent an increase of only 103 AFI'. Since the City is still pursuing actions to maximize our yield and will be coming back to Council in May with the City Annual Water Operations Plan, it is not appropriate to take any additional action at this time. Maximizing the Safe Annual Yield There are a number of actions staff is currently pursuing to maximize the yield of the existing reservoirs. 1. Treatment - The primary concerns at the Salinas Reservoir are the taste and odor problems and manganese levels. Laboratory analysis has shown that these problems can be addressed by the addition of potassium permanganate. Temporary feed equipment and chemicals have been ordered to do full scale testing. This should be on line by the middle or end of February. This will allow us to treat,water down to the 2000 to 3000 AF storage level. J OWN! city of san tins osispo AN IMMIFMN COUNCIL AGENDA REPORT Coordinated Operations Study .Page 5 2. Intake - Another problem at the Salinas Reservoir is the lack of flexibility at the lower levels of the lake to withdraw the water. By having greater flexibility in the withdrawl, it is possible to choose the level at which the water quality is the best and easiest to treat. Staff Js currently investigating the addition of an intake tube which will give us this flexibility. 3. Down Stream Uses - Storage at the Salinas Reservoir is dependent on a live stream being established downstream of the dam. The use of water downstream influences the establishment of the live stream. Staff is investigating the water rights and use along the river. 4. Groundwater - By utilizing groundwater during peak months it is possible to relieve the load on the surface water sources. The groundwater wells currently under construction will help this situation. Those wells will be completed by the end of March. Recommendations Staff recommends that .the Council receive and file this report plus direct staff to continue its efforts in maximizing the yield of our supplies and request the Whale Rock Commission begin studies to increase the pumping capacity of it's .conveyance system. Staff also recommends that no adjustments to the City's safe annual yield be made at this time. attachments say2799/n I /HJT -- MEETING DA.TE:. March 23 1989 WHALE ROCK COMMISSION REPORT ITEM NUM FROM: William T. Hetland Prepared bye Allen Short J Utilities Director Water Division Manager SUBJECT: Whale Rock Reservoir Pumping Capability and Conveyance System. BACKGROUND: The City retained the firm of Leedshill-Herkenhoff to perform a safe annual yield study on the Salinas Reservoir and on the coordinated use of the Salinas and Whale Rock Reservoirs. During the study it was ascertained that the Whale Rock conveyance system was in need of additional pumping capacity to meet peak summertime demands. In addition, because of the unusually dry conditions, the pumping system at Whale Rock is continuously operating at maximum output. Under these conditions, with all six (6) pumps in operation, there are no standby or backup pumps in case of a pump failure. As a result, if a pump failure occurs Whale Rock will be unableto meet its delivery demands until the repair is completed. The Whale Rock pumping system is over twenty (20) years old and has provided excellent service and reliability. However, because of age and length of service we anticipate problems could occur. In addition, when the pump stations were constructed, expansion J capability was built into the design. As a result, there are locations at each pumping station where additional pumps could be installed with minimal effort. CONSEQUENCE OF NOT TAKING ACTION If additional pumps are not added to the system, and if a pumping failure were to occur, Whale Rock Reservoir could not meet 100% of its delivery demands during the summer months. RECOMMENDATION: Direct Leedshill-Herkenhoff to study in detail the Whale Rock conveyance system and develop both long term and short term recommendations with associated cost estimates. agenda2/cas n