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<br />City of Elk River <br />Northeast Development Area Optimization Proposal <br />Page 3 of 8 <br /> <br /> <br />b. Attend one (1) in-person kick-off meeting to discuss project goals, data request <br />needs, project timeline, etc. <br />c. Attend two (2) virtual check-in meetings with City staff to discuss proposed utility <br />extensions, findings, and recommendations. <br />d. Attend one (1) virtual project summary meeting with City staff to discuss the draft <br />report. <br />e. Prepare and deliver one (1) in-person presentation on the final report and <br />recommendations to the City Council. <br />2. Sanitary Sewer System Analysis: <br />a. Assessment of Baseline Flows: <br />i. Evaluate previous studies completed by the City. <br />ii. Evaluate sanitary sewer flow pumped by lift stations located downstream <br />of the proposed development(s). <br />1. City staff to provide historical flow data at each lift station in the <br />form of pump runtime data. <br />2. City staff to provide historical influent flow data at the system’s <br />wastewater treatment facility (WWTF). <br />3. City staff to complete pump drawdown tests, with guidance from <br />AE2S staff, to identify each lift station’s existing firm pumping <br />capacity. <br />4. Calculate residual pumping capacity at each lift station by <br />calculating existing average and peak hourly flows pumped and <br />comparing them to each lift station’s firm pumping capacity. <br />5. Calculate residual flow capacity for each lift station’s forcemain <br />based on industry-standard recommended headloss and velocity <br />design points. <br />b. Sanitary Sewer Model Development: <br />i. Develop a sanitary sewer system model for the sanitary sewersheds located <br />downstream of the proposed development(s). Model to include lift stations, <br />forcemains, and gravity pipe 8-inch in diameter and larger. <br />ii. Develop two (2) flow scenarios (steady state average daily flow and steady <br />state peak hourly flow). <br />c. Sanitary Sewer Flow Projections: <br />i. Project the existing, 2045, and ultimate average daily and peak hourly <br />sanitary sewer flows for the areas to be served based upon the planned <br />growth and future zoning classifications. If City-specific peak hourly <br />peaking factors cannot be used due to a lack of available historical data, <br />Metropolitan Council Environmental Services Flow Variation Factors for <br />Page 102 of 204