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HomeMy WebLinkAboutTask Order 10232 with Murray Smith Associates for Water Supply Planning��E IDIS IAN�- TASK ORDER NO. 10232 Under the MASTER AGREEMENT FOR PROFESSIONAL SERVICES BETWEEN CITY OF MERIDIAN AND MURRAY, SMITH & ASSOCIATES, INC This Task Order is issued by City and accepted by the Engineer pursuant to the mutual promises, covenant and conditions contained in the Master Agreement between the above mentioned parties dated April 13, 2010. WATER SUPPLY PLANNING CITY OF MERIDIAN PURPOSE This Scope of Services is for Professional Services between Murray, Smith & Associates Inc. (MSA) and the City of Meridian, Idaho (City). Services authorized by this Task Order No. 10232 shall be for professional engineering services in support of the City's Water System. SCOPE OF SERVICES The project will be based on a phased workshop approach with City and consultant staff. Once the threats to existing sources have been evaluated, an associated "percentage" of source water at risk will be estimated. At that point, potential mitigation strategies will be identified. These alternatives will be reviewed with City staff to determine which ones should be studied further. Based on a subset of the potential supply alternatives, a feasibility analysis will be conducted to determine the regulatory, legal, economic, social/political and "other' parameters that could impact each alternative. Once that information is compiled, a workshop will be held with the City to determine when and if any of the water supply options will be pursued. A contingency task has been included in the project to help cover unforeseen evaluations or related requests by City staff. A technical memorandum will be developed as part of the project and additional information and levels of detail added as part of each subsequent threat. The following tasks are included in this scope of work: 1. Perform Existing Supply Threat Evaluation 2. Identify Potential Strategies to Address Threats 3. Feasibility Analysis of Potential Strategies 4. Contingency Task Order No. 10232 Water Sunole Plannina Task I - Perform Existing Supply Risk Evaluation There are a number of potential threats that could impact the City's ability to use and/or acquire adequate groundwater supply to serve long term water needs. These include, but are not limited to the following: 1. Conjunctive Management of Water Supply in the Treasure Valley 2. Groundwater Quality 3. Groundwater Quantity 4. Water Rights Availability 5. Growth of City Water Requirements 6. Climate Change 7. Regulatory Changes Conjunctive management of the Treasure Valley surface and groundwater supplies has been discussed as a potential threat to the City's use of a groundwater under a senior water rights "call" situation. The majority of the City's water rights are no more than 20 years old, and could be subject to regulated use if more senior water rights holders were being impacted. Such a situation has occurred in the East Snake Plain Aquifer over the past few years. Presently in the Treasure Valley it is only likely under a prolonged drought condition, that impacts surface water users. It is reasonable to expect that over the next 50-100 years such a situation could occur in the Treasure Valley and a determination of what types of mitigation strategies are viable, is proposed. The City has dealt with water quality due to uranium over the MCL in several wells recently. This is an extremely expensive constituent to remove through treatment. If the number of wells with uranium contamination increases over time, it could also pose a threat to the City's ability to meet municipal water demands. Groundwater quantity concerns currently appear to be relatively small. Wells with over 2,000 gpm are common in the City and the drawdown from pumping appears to be relatively localized, suggesting that the overall groundwater levels are not declining. However as growth continues in the valley and if prolonged droughts occurred groundwater availability could be an issue. The process by which the Idaho Department of Water Resources (IDWR) issues water rights could change in the future making new water rights more difficult to get, particularly as more and more groundwater is removed from the Treasure Valley Aquifer. Another important variable is demand. How much water will the City of Meridian's customers require in the future? While current projections are available, these numbers could change significantly due to the changing of land use types to encourage higher density development or if more water intensive industries locate within the City. A decision will need to be made to determine the "factor of safety" that the City wants to place on future demand growth and the water required to meet those demands. Task Order No. 10232 Water Supple Planning 2 One of the biggest variables that particularly the Inland West faces over the next 100 years is the impact of climate change. A reduction in precipitation and/or the amount of that precipitation that falls in the form of snow will have a significant impact on the surface water supplies in the Treasure Valley. Other factors may also be included by the City. Information regarding each of the items listed above will be collected and discussed with City staff. The challenge will be to provide reasonable assumptions without being overly conservative. An attempt to quantify the portion of the City's existing water supply that each of these factors might put at risk, will be completed. It is understood that some of the decisions will be "policy" based due to the inability to put precise numbers on some variables. Assumptions: The budget is based on an evaluation of the six (6) items listed above. If additional factors are identified for evaluation, budget from the contingency task will be required. Up to two (2) workshops are included in this task. Team subconsultant involvement will be limited to the workshops in this task. Deliverables: A draft version of the technical memorandum summarizing this task's work will be provided to the City at the conclusion of the task. Task 2 — Identify Potential Mitigation Strategies A number of potential mitigation strategies exist. The goal of this task will be to create a list of options to mitigate the threats identified in Task 1. This evaluation could include but will not be limited to options such as; the acquisition of surface water rights, expanded use of wastewater reuse, interbasin transfers (Snake or Payette), trading of WW effluent to canal companies for upstream canal water, the investment in new surface water storage and leasing of agricultural water rights. The MSA team will work with the City to develop the list of alternative strategies along with the easily identifiable challenges associated with each. The MSA team will then meet with City staff to review the strategies and conduct a "reality check" on each to decide which ones merit continued analysis (Task 3). Assumptions: MSA, SPF, Westwater, and Idaho Water Engineering will be involved in this task. Two onsite meetings/workshops will be conducted as part of this task. Deliverables: A draft technical memorandum that summarizes this task's work will be provided to the City at the conclusion of the task. Task 3 — Feasibility Analysis of Mitigation Strategies It is envisioned that three (3) potential mitigation strategies will be identified for more detailed evaluation as part of this task. A preliminary diligence evaluation will be developed for each of the three potential mitigation strategies. The diligence review will provide a description of the strategy. The diligence analysis will also include specific review of regulatory, legal, economic benefit, cost, social/political, physical and technical reliability, and "other" parameters that could impact feasibility of each strategy. The MSA team will Task Order No. 10232 Water Supple Planning 3 collaborate in developing the diligence reviews, with each consultant taking on specific areas of research. The objective of the diligence reviews will be to provide a comparison analysis for each strategy allowing the City to evaluate the best strategies to pursue further. A workshop will be conducted with the City to discuss the assumptions and add, delete or modify as appropriate. At that point, an additional round of evaluation will be conducted by the MSA team prior to providing the summary to the City in the form of the draft summary report of all work. A final meeting will be conducted with the City to determine which of the future water supply strategies will be pursued. Assumptions: MSA, SPF, Westwater, and Idaho Water Engineering will be involved in this task. Two (2) meetings/workshops will be conducted with the City as part of this task. It is assumed that the City's water rights attorney will provide a legal perspective on the strategies studied in this task and will be contracted directly by the City. Deliverables: A draft and final summary report will be generated as part of this task and delivered to the City. Task 4 — Contingency It has been acknowledged that this project could include additional areas of investigation that were not originally anticipated when the scope was written. The contingency could also be used to develop a specific game plan and scope for the actual implementation of a selected water supply strategy or strategies. Assumptions: Provides a nominal budget for use by the team for out of scope or follow on work to be completed. Deliverables: No deliverables have been identified at this time. TIME OF PERFORMANCE The completion date from Authorization to Proceed for this Task Order is through December 2011. The MSA team will make every effort to complete the work in a timely manner; however, it is agreed that MSA cannot be responsible for delays occasioned by factors beyond its control, nor by factors that could not reasonably have been foreseen at the time this Task Order was executed. COMPENSATION The Not -To -Exceed amount for all services listed in this Task Order No. 10232 is one hundred twenty-eight thousand three hundred forty dollars ($128,340.00). The hourly rates for services and direct expenses is attached (Exhibit A) and by this reference made a part hereof. Fees will be billed for actual time services are rendered up to the Not -to -Exceed amount per the hourly rates for services and direct expenses, attached as (Exhibit A) and by this reference made a part hereof. No compensation will be paid over the Not -to -Exceed amount without prior written approval by the City in the form of a Change Order. Task Order No. 10232 Water Supple Planning 4 Table 1 Labor Hours, Subconsultant Fees and Total Project Costs Task Number Labor Subconsultant Hours & Expenses Total Cost Task 1 — Perform Existing Supply Risk 1 106 $3,150 $15,306 Evaluation Task 2 — Identify Potential Sources of 88 $12,650 $22,734 Supply Task 3 - Feasibility Analysis of Potential Sources of Supply 244 $47,300 $75,300 Task 4 - Contingency TBD TBD $15,000 Project Totals 1 438 $63,100 $128,340 CITY OF MERIDIAN BY: TAMMY,WEERD, MAYOR Dated: Approved by Council: a �� Approved as to Content `,``5111111 kl1�11 Jp1/: JJ! `Y C IRK ''y1117 w BY: KEITH -WATTS, PURCHASING MANAGER Dated:zz MURRAY, SMITH & ASSOCIATES, INC Dated: - Vz� Dep M 00 t Task Order No. 10232 Water Supple Planning 5 Approved as to Form CITY ATTORNEY Task Order No. 10232 Water Supple Planning TITLE: &� jc-�� Dated: (-.-0 V,