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• <br />CONS~I,TING ENGINE(~S <br />1326 Energy Park Drive October 12, 1995 <br /> File: 230-151-20 <br />St. Paul, MN 55108 <br />612-644-4389 <br />1-800-888.2923 Mr. Pat Klaers <br />Fax: 612.644-9446 City Administrator <br /> City of Elk River <br /> 13065 Orono Parkway <br /> P.O. Box 490 <br /> Elk River, MN 55330 <br />RE: WWTF UPGRADE <br />ELK RIVER, MINNESOTA <br />Dear Mr. Klaers: <br />CIVIL ENGINEERING: <br />ENVIRONMENTAL The plans and specifications for the wastewater treatment facility upgrade have been <br />MUNICIPAL completed and are ready for the Council's approval. The project will upgrade the existing <br />PLANNING facility from its currently rated 1.04 million gallons per day (MGD) capacity to 2.20 MGD <br />•soLlDwasTE capacity for the Year 2012. Current wastewater flow averages about 0.70 MGD. <br />STRUCTURAL <br />suevErlNG As you may recall, the design of the 2.20 MGD upgrade was initiated in the spring of 1993. <br />TRAFFIC Shortly after the preliminary design, the rotating biological contactors (RBC) failed and <br />TRANSPORTATION prompted us to proceed with the $914,000 interim improvement project. For the interim <br />improvement, we basically took the trickling filter pump station and one of the two trickling <br />ELECTRICAuMECHANICAL filters out of the 2.20 MGD upgrade and installed them earlier to replace the failed RBC. The <br />ENGINEERING: <br />Flvac interim improvement project was completed in December of 1994, and the trickling filter has <br />POWER DISTRIBUTION been in operation since. <br />SCADA <br />SYSTEM CONTROLS This project is the continuation of the 2.20 MGD wastewater treatment plant upgrade. <br />Initially, some process equipment will not be installed per Mr. Darrell Mack's request, due <br />to the expected low flow condition in the first few years. The intent was to allow the City to <br />defer approximately $300,000 equipment cost for 5 to 10 years, and also to keep that <br />equipment from sitting idle for an extended period of time. Since we have finished the design <br />for a complete 2.20 MGD facility, in addition to the plans and specifications for this <br />construction, we will also send a copy of the plans and specifications for the deferred <br />equipment to you as a record for future use. <br />OFFICES IN: <br />• MINNEAPOLIS <br />PRIOR LAKE <br />ST. PAUL <br />230/151-1107-oct <br />WASECA <br />An Equal Opportunity Employer <br />