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HomeMy WebLinkAbout10A Accepting Quotes for Equipment for Sanitary Sewer Project/ Oy P � U +� U 4646 Dakota Street SE �'nvrvESO� Prior Lake. NIN 55372 CITY COUNCIL AGENDA REPORT MEETING DATE: MAY 2, 2011 AGENDA #: 10A PREPARED BY: JOE WIITA, STREET AND UTILITIES SUPERVISOR PRESENTER: JOE WIITA AGENDA ITEM: CONSIDER APPROVAL OF A RESOLUTION ACCEPTING QUOTES FOR THE PURCHASE OF STANDARDIZED EQUIPMENT FOR THE 2011 SA- NITARY SEWER PROJECT 11 -015 DISCUSSION: Introduction The purpose of this agenda item is for the City Council to accept quotes for the purchase of standardized equipment for the 2011 sanitary sewer im- provements. History The City of Prior Lake maintains more than 100 miles of sanitary sewer mains that collect and convey sewage to the Met Council Sewer Interceptor. This system includes nearly 8,000 sewer services and 39 sanitary sewer lift stations. Annually the City proactively completes improvements to the infra- structure to ensure that it operates efficiently and correctly. Failure to main- tain this infrastructure can result in sewage backups and substantial impacts to private property. The City's annual maintenance program is detailed in the Sanitary Sewer Maintenance Program. This annual maintenance is re- quired to meet the League of Minnesota Cities Insurance Trust guidelines and reduces the City's liability. In addition to reducing liability, these projects allow the City to minimize and prevent the inflow of ground water into the City's sanitary sewer system. By minimizing this inflow, the City minimizes sewer treatment costs with the Met Council The annual improvements include sewer pipe lining, sewer main replace- ment and lift station improvements. Current Circumstances For 2011, City staff has identified replacement of the existing sewer pipe that runs under the lake between the southern terminus of Watersedge Trail and the northern terminus of Glendale Avenue. This improvement will be completed in conjunction with phase 1 of the Boudin's /Rutgers Neighbor- hood improvements. Currently the sewer runs under the lake via an "inverted siphon" sewer main constructed in 1975. This sewer serves more than 300 homes in that area of the City. Over the last several years the City has experienced several sewer back -ups due to the malfunction of the siphon. Siphons were used in the 1970's as a primary way to cross rivers and streams prior to lift station C:1Documents and SettingslcgreenWy Documents\SharePoint Drafts12011 Sanitary Sewer Improvements Agenda 5- 2- 2011.doc technology becoming preferred. Due to minimal grades this siphon does not operate efficiently and has very high maintenance costs. Replacing the si- phon with a forcemain under the lake will allow the City to lower the existing sewer in the Boudin's /Rustic Neighborhood to provide better flow and pro- tection to residences. This option will also allow the City to preserve the siphon as an emergency forcemain thus providing an emergency alternative for sewer service that does not currently exist in this area of the City. Conclusion Because the City is reconstructing Watersedge Trail in 2011 it is appropriate to make the improvements to the sanitary sewer lake crossing concurrently to eliminate current sewer back -up issues and provide long -term dependa- ble sewer service to this area. ISSUES: If the City does not make this upgrade in conjunction with the 2011 Recon- struction Project, the City will most likely need to excavate a portion of the reconstructed Watersedge Trail to make repairs in the next 10 years. With- out replacing the crossing the existing sewer grade issues can't be repaired and back up issues will continue. The Duluth Avenue sanitary sewer repairs as approved in the 2011 -2015 CIP would be delayed to a future date and discussed in the 2012 -2015 CIP. City Staff believe that the Watersedge Lift Station construction is of greater priority than the Duluth Avenue repairs at this time and coincides with the 2011 Boudin's reconstruction project. FINANCIAL With the City as general contractor, considerable money will be saved by IMPACT: not paying mark up costs for equipment and components for the lift station. Costs for standardized equipment to complete the project come to $81,858.77 which cover the following items: • Controls • Structure • Hatches • Valve Vault • Pumps • Guide Rails /Supports The 2011 Sewer Fund budget identifies $150,000 for sanitary sewer system improvements for the Duluth Avenue and $55,000 for lift station panel and equipment installation. The work for the installation of this lift station will not exceed budget for these two line items identified in the sewer budget. ALTERNATIVES: 1) Approve a resolution accepting quotes for the purchase of standardized equipment for the 2011 Sanitary Sewer Improvement Project 11 -015. 2) Table this item for a specific reason and provide staff with direction. 3) Direct staff not to proceed with the project. RECOMMENDED Alternative No. 1. MOTION: Reviewed by: Frank Boyles, City Manager 2 PR p r h � U trl 7 r r1V XEs o � P 4646 Dakota Street SE Prior Lake, MN 55372 RESOLUTION 11 -xxx A RESOLUTION ACCEPTING QUOTES FOR THE PURCHASE OF STANDARDIZED EQUIPMENT FOR THE 2011 SANITARY SEWER PROJECT 11 -015 Motion By: Second By: WHEREAS, The City of Prior Lake maintains more than 100 miles of sanitary sewer main, nearly 8,000 sewer connections and 39 sanitary sewer lift stations; and WHEREAS, In order to keep the system functioning properly and to meet the League of Minnesota Cities Insurance Trust guidelines and Met Council inflow requirements, the City annually repairs and replaces sections of its sanitary sewer system: and WHEREAS, Phase 1 of the Boudin /Rutgers Neighborhood reconstruction project requires sewer improvements to the existing sewer running under the lake; and WHEREAS, City staff recommends the existing inverted siphon utilized between the southern terminus of Watersedge Trail and Glendale Avenue be replaced in conjunction with those improvements; and WHEREAS, The replacement of this crossing concurrent with the Boudin /Rutgers Neighborhood reconstruction project will eliminate the need for future impacts to reconstructed streets for replacement of the sewer; and WHEREAS, The City previously adopted a Standardized Comprehensive Management and Rehabilitation Plan for the purchase of standardized equipment. NOW THEREFORE, BE IT HEREBY RESOLVED BY THE CITY COUNCIL OF PRIOR LAKE, MINNESOTA as follows: 1. The recitals set forth above are incorporated herein. 2. The City Council accepts quotes and authorizes staff to purchase necessary equipment in the amount of $81,858.77 in accordance with the Lift Station Standardization Plan. 3. The funding for the project shall come from the following Sewer Fund accounts: 604 - 49450 -412 $55,000.00 604 - 49450530 $26,858.77 PASSED AND ADOPTED THIS 2 " DAY OF MAY, 2011. V10 NO M ser Myser Erickson Erickson Hedberg Hedberg Keeney Keene Soukup Souku Frank Boyles, City Manager