CC - Agendas - City Council - REGULAR - 7/10/2012

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EXHIBIT A City of Prescott 2012 Water Distribution System Model Update SCOPE OF WORK some of the evaluations may depend on the availability of data on pump characteristics, energy usage, and water deliveries to specific pressure zones. 2.8 Emergency Operations and Redundancy Evaluation An evaluation will be undertaken with the goal of planning for emergency operations. The outcome of these evaluations could include emergency and normal O&M operating procedures and strategies, as well as capital improvements that provide an increased level of reliability for the distribution system. This task will also include the Chino Valley Campus. Many of the operating procedures in different zones will be very similar if not identical, so operating procedures for multiple zones will be combined where appropriate. Scenarios would include emergency operations as well as maximum day and peak hour operating conditions. Carollo will collaborate with City operations staff to identify emergency operations that have occurred in the past as well as to create scenarios that could happen in the future. Where deficiencies are discovered, improvements to operating procedures or infrastructure will be developed to address the deficiencies. 2.9 Airport Area Infrastructure Evaluation An evaluation of the airport area water supply infrastructure will be undertaken that builds upon the airport area planning that has been completed previously. The water demands and fire flow requirements of specific development projects will be estimated and included along with the typical demands that are included in the land use plan. Peaking factors will be estimated for the specific types of development that will occur. Infrastructure requirements will be established for the specific developments that are planned. Fire flows, peak demands, and storage requirements will be evaluated and quantified. Pipe sizes and conceptual layouts will be developed. The specific requirements of the airport area will be documented in a technical memorandum. 2.10 Future Development Planning Water infrastructure needed to serve future demand will be identified and analyzed using the City's model. Future infrastructure recommendations will be developed in those portions of the Prescott planning area that are most likely to develop, given the limited water resources that are available to the City. Proposed infrastructure recommendations will be investigated to make sure that the recommendation is technically feasible, given the terrain, land use, and other considerations that would be important to ensure that the capital improvement plan that is presented is viable. The infrastructure that is identified in this task from a technical feasibility perspective will be used in developing the capital improvement program, where price and payment responsibility is defined per the scope in Task 3.0. h:\bd_phx\prescott\water model update\prescott water model update project 06192012.docx 6