Agenda Packets - 1982/11/08 - Laserfiche WebLink

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j6o�v MEMO TO: Mayor and City Council FROM: Director of Public Works/Community Development DATE: November 10, 1982 SUBJECT: LIFT STATION 13 AT EDGEWOOD DRIVE AND COUNTY ROAD I On October 4, 1982, pump #1 motor in lift station #3 failed. Further investigation during repair determined that the pump impellar slipped on the pump shaft and bound up in the pump casing causing the motor to burn out. The pump impellar was also damaged and required replace- ment. These repairs cost approximately $1,100 for parts and motor repair and approximately 12 manhours. Maintenance personnel are of the opinion that pump #2 may soon require similar major maintenance. This event prompted staff to review in a very preliminary fashion the feasibility of eliminating lift station #3 similar to lift station #5 on Quincy Street last year. The following data has been researched (see attached sketch for lift station service area). 1) Lift station #3 was built in 1965. 2) Lift station #3 pumps an average of 6 to 10 hours per day at 550+ gallons per minute. 3) Annual electricity costs; 1980-$616.55, 1981•-So51.51, 1982 (estimate)-$674.33. 4) Elevation of inlet to lift station is 882.0 and elevation of bottom of wet well is 875.33. 5) Elevation of Metro Waste Control Commission 66 inch inter- ceptor sewernear Edgewood Drive and Bronson Drive is 861.54. 6) Distance from lift station to Metro Waste Control Commission sewer is 1100+ feet. 7) Preliminary construction cost estimate: 1100 feet of 12 or 15 inch sewer 25 feet deep Pavement and sod restoration New meter station TOTAL EngAncering $120,000 - $145,000 $50,000 - $65,000 $25,000 - $36,000 $195,000 - $246,000 $29,000 - $37,000 Staff requests direction from City Council as to whether to pursue a more detailed feasibility study of phase out of lift station #3