2014-135 Council Resolution - Laserfiche WebLink

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Mr. Michael Grochala City of Lino Lakes, MN October 27, 2014 Page 3 provided to the City for future use. Existing storage, supply, and treatment capacity data will be incorporated into the City's water system model. WSB will also review water usage and pumping data to determine water usage per customer category (residential, commercial, and industrial) and maximum day peaking factors. An optional task is presented below under Task 7 to evaluate the City's hourly water usage. Should this optional task not be selected, an estimated hourly peaking factor for the metro area will be utilized. Water usage demands within the WaterCAD model will be allocated to simulate where actual water demands are located within the City. A correlation between customer category types and land use will be necessary for completion of this task. The model will also be calibrated using hydrant flow test data provided by the City to ensure the model accurately represents the existing water system. WSB will review the City's hydrant flow information and ISO Classification to determine fire flow requirements across the City. The capacity of the existing water system under the existing demand scenarios will be evaluated to determine any deficiencies. Recommendations to correct deficiencies will be provided and will include fire flow improvements as they relate to the City's ISO classification. Task 4: Population and Water Demand Projections Based on future land use, the projected water usage per customer category/land use will be evaluated for the ultimate population density. The water usage will be included in an ultimate water system model to incorporate the system improvements. The existing water system model will be expanded to model proposed water system improvements and future water system demands of the trunk system (greater than 8 -inch diameter pipe sizes). Task 5: Future Trunk Water System Model Development and Evaluation Using the existing water system model, the overall system pressure and fire flow will be evaluated to identify any future trunk water system improvements that are necessary to provide sufficient pressures and flows for the ultimate land use plan. No phased scenarios will be completed with this task. Phased future development scenarios can be completed for an additional scope and fee. Recommendations for the future ultimate trunk water system will be included on any type, location, and size of distribution mains, storage, and supply. Task 6: Prepare Water System Technical Memorandum A water system technical memorandum will be prepared and submitted to City for review. WSB will incorporate any comments based on the City's review into the final technical memorandum. The following data at a minimum will be included in the technical memorandum: • Description of the modeling process and calibration method; • Water demand estimates, assumptions, and land use changes; • Existing water system evaluation; • Existing water distribution system layout map; • Existing average day and peak hour demand pressure contour map; • Existing maximum day demand and available fire flow pressure contour map; • Proposed future trunk water system evaluation;