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11-14-05
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11-14-05
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URSi <br /> ITEM 3.B <br /> Thresher Square <br /> 700 Third Street South <br /> Minneapolis,MN 55415 <br /> Phone: (612)370-0700 <br /> Fax: (612)370-)3783 <br /> To: Michelle Wolfe/ Copy: Tom Moore/Arden Hills File: 31809905.00201 <br /> Arden Hills Jim Perron/Arden Hills <br /> Nick Landwer/URS <br /> Frank Ticknor/URS <br /> From: Gregory Brown, PE <br /> Arden Hills City Engineer <br /> Date: November 8, 2005 <br /> Subject: Authorization to Advertise for Bids <br /> 2006 Sanitary Sewer Rehabilitation Project <br /> Background .� <br /> As part of the continuing rehabilitation of the sanitary sewer system for the City,the Council <br /> authorized preparation of Plans and Specification for the 2006 Sanitary Sewer Rehabilitation <br /> Project on August 8, 2005. Plans and Specifications for this project have been completed <br /> including a construction cost estimate. <br /> Upgrading lift stations is the staff's highest priority of capital improvement since the failures at <br /> the stations can result in costly repairs and potential damage to residences. Upgraded stations <br /> include 5 year warranties on mechanical parts, use less electricity and generate fewer alarms and <br /> maintenance requirements which ultimately result in additional savings to the city(estimated <br /> $2,500—$5,000 per year in material, electricity and manpower per station). By reconstructing the <br /> stations in groups we intend to realize additional savings of capital costs over completion <br /> individually. The lift stations included with this project are the final four stations still operating <br /> with 1960's equipment (although they have had many repairs and parts changes over the years). <br /> Project Description <br /> Lift Stations#1,#11,#12 and#13 are the Cities final four old "steel can" structures built in the <br /> early 1960's. These stations are being proposed for reconstruction due to their age,condition and <br /> need to add efficiency to the City's lift station maintenance operations. The method for <br /> reconstruction for these lift stations will follow that of Lift Station#4 and#9 during this past <br /> summer and of other previous lift station reconstruction processes. A temporary bypass pump <br /> will first be installed from an adjacent sanitary manhole into the forcemam to keep the system <br /> running during construction. The existing lift station structures and control panel will then be <br /> removed and the new pumping system and electrical system will be installed. The bypass is <br /> removed once City staff approves the system and the new lift station is then brought on-line. <br /> R:L31809905\DOCUMENTS\Word\Misc\Auth for Ad 11-4-05_doc <br />
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