Agenda - Council - 06/26/2012 - Laserfiche WebLink

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serviced from an 18-inch gravity sewer extension from the lift station. Subdistricts R23, R24, and R25 on the east side of CSAH 5 will be serviced by trunk sewers flowing to lift station RLS-8. The forcemain from the station will discharge to the proposed trunk sewer in subdistrict R22. Existing lift station RLS-3 was not designed to accommodate the sewer flow from the north side of Trott Brook. The existing pumps will need to be replaced with higher capacity pumps. The existing 8-inch forcemain from lift station RLS-3 will be essentially at maximum capacity after the upgrade of the lift station pumps and will have high head loss from the flow through the pipe. The high head loss requires larger motors on the lift station pumps. To reduce this head loss somewhat, it is proposed to extend a 21-inch gravity sewer north in subdistrict R-1 on Variolite Street from the existing 24-inch trunk sewer. This reduces the forcemain length and related head loss. The lift station upgrade at RLS-3 and the sewer extension in subdistrict Rl are south of Trott Brook but are required to provide sewer service to the subdistricts north of Trott Brook. The lift station upgrade will be required with the initial extension to the north side of Trott Brook. The R1 trunk construction would not be required until service is extended to Subdistricts R23 - R25. The total estimated costs are: Subdistrict R23-R25 $1,288,350 Subdistrict R21 and R22 1,911,000 Subdistrict R1 377,000 Subdistrict RLS-3 215,000 Total: $3, 791, 350 Itemized cost tabulations are provided in Item F in the Appendix. City of Ramsey Page 4-5 Comprehensive Sanitary Sewer Plan - 2012 Prepared by Bolton & Menk, Inc.