Agenda - Public Works Committee - 04/20/2021

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Tim Gladhill, AICP March 4, 2021 Page 3 of 4 Estimates and Memorandum Estimates and Memorandum: We will prepare a brief Memorandum with exhibits depicting the results of the study. High level construction cost estimates will also be prepared for use in budgeting for the improvements. Fees associated with this task are estimated at $3,240. Additional Recommendations Based on the findings of our analysis, we may make recommendations for tasks which should be completed during the design phase of future projects. The recommendations could include such items as: soil borings, additional survey, additional lift station related testing (concrete, power supply, etc.), and 1/1 analysis of the existing sanitary sewer system in the area. Optional: Lift Station Analysis Our proposed analysis will assume that the existing lift station will be able to accommodate flows from the Hunt Addition on a temporary basis. Once the Makowsky Addition develops, the Hunt Addition sanitary sewer flows will be conveyed through the Makowsky Addition. The current Sanitary Sewer Comprehensive Plan depicts service to this area via gravity sewer which then flows to an existing lift station. The lift station then pumps the sewage through a forcemain which discharges in Variolite Street near 166th Avenue. Our understanding is that the lift station is at or near capacity, requiring alternative solutions to be explored. The lift station analysis will most likely include the following components: • Meet with Public Works staff to gain an understanding of existing operations of the facility, • Complete a site visit and perform a cursory review and condition assessment, • Review the control panel, SCADA system and power source. Develop recommendations based on reliability and long-term usage of the existing equipment. • Analyze existing and future flows to the facility. Develop an estimate of when pump replacement will need to occur. • Analyze forcemain, lift station structure and pump capacity to determine if capacity exists when full development of the service area occurs. • Perform a general assessment of the existing power source. Provide discussion related to the implications of power failure, the potential need for a backup power generator, and consequences of power failure. • Prepare cost estimates for recommended improvements. The above analysis is estimated to cost $9,260. The actual fees may vary, depending upon the findings described in the primary task. E3crltrrrr & M r k. 15 an fy unity i pLoyer.