2007-09-12 CC Packet - Laserfiche WebLink

Home Browse Search

Lift Station #3 It has been proposed that Centerville's lift station number three (LS #3) be eliminated and a new gravity sanitary line be run from the lift station to lift station number four. A survey loop was run between the two lift stations, confirming this is physically possible. EXISTING CONDITIONS Currently, LS #3 is operated and maintained by Centerville's public works staff. The lift station was installed in 1987 and the pumps were replaced on the station in 1997 indicating a 10 year life span for these pumps. This would lead us to the assumption that the existing pumps are likely nearing the end of their useful life. The staff is spending approximately one hour of time per week at the lift station for maintenance needs. PROPOSED IMPROVEMENTS Flow entering LS #3 would be re routed in one of two directions. In Option 1, the outgoing pipe would run south along the existing storm pond and then east along the south side of the development in the City's existing utility easement. Alternatively, the sewer could be relayed from LS #3 to the east, down Center Street. This would require re- hooking services along the way but may be slightly shorter and would replace the existing sewer which is about 20 years old. The estimated project cost of each of these options is presented in Table 2. The proposed routes are shown on Figure 10. TABLE 3. ESTIMATED PROJECT COSTS FOR GRAVITY SEWER IN LIEU OF LS #3 Option 1 - South Route Option 2 - Center Street Route Item Cost Item Cost Pipe, MHs, etc. (1700 LF @35/LF) $59,500 Pipe, MHs, etc. (1600 LF @35/LF) $56,000 Jacking (under CSAH 54) $20,000 Jacking (under CSAH 54) $20,000 Connect to LS $10,000 Connect to LS $10,000 Reconnect Services $0 Reconnect Services $5,000 Restoration (turf) $15,000 Restoration (turf) $1, 000 Restoration (road - Fairview) $4,500 Restoration (road) * $- Total $109,000 Total $92,000 .THIS ASSUMES THERE ARE NO COSTS ASSOCIATED WITH RECONSTRUCTING THE ROADWAY SINCE THIS WORK IS PART OF THE PROJECT REGARDLESS OF THE CHOSEN ROUTE DUE TO THE INSTALLATION OF NEW WATER MAIN. OPERATION AND MAINTENANCE COSTS Table 3 summarizes the annualized maintenance costs associated with operating LS #3. TABLE 4 - ESTIMATED ANNUALIZED OPERATION AND MAINTENANCE COSTS FOR LS #3 Item Cost Frequency Annualized Cost Labor (daily check) $50 Weekly $2,600 Labor (intermittent call-outs) $100 Monthly $1,200 City of Centerville 2009 Street and Utility Improvement Project .t; Bonestroo Project No: 616-07-]580 Page 22