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<br />Groveland Lift Station Grinder Pump <br />July 7, 2008 <br />Page 2 <br /> <br />Braun feels that minor repairs (i.e.-retrofit) will bring the pumps back to 100%. <br />The retrofit entails installation of new seals that cost $1,200 to $1,400 each and <br />the machining of the housing to recover spec. tolerances. Braun quotes a price <br />of $5,000 for this procedure but recommends instead a grinder in the wet well to <br />eliminate most all bulk material from becoming lodged in the pump. The price of <br />a grinder is $28,000-$30,000 in addition to the cost of the retro fitting. This would <br />bring the estimated total price for the project to $33,000-$35,000. <br /> <br />The other option is to replace the pumps themselves with grinder pumps. The <br />cost of this would be $28,000 for the pumps and an additional $13,000 for <br />plumbing, wiring, and labor as the grinder pumps require larger horsepower <br />motors (15 hp. Vs. 7.5) and larger diameter pipes. Staff feels that this would be <br />economically prohibitive to achieve the same desired result. Braun feels that <br />they could give a more definitive final quote on the project within a month’s time. <br /> <br />The 2008 budget, under 730-4823-9100, allows $15,000 for Contingency which <br />may include impeller replacement at (erroneously) Bronson. In fact, staff had <br />intended that money to be directed towards the Groveland lift station. Account <br />730-4823-5160 under System Maintenance has $50,000 for sewer main and <br />manhole rehabilitation. <br /> <br />Staff feels that the inclusion of a grinder is a necessity in either scenario. The <br />amount of man hours spent cleaning the pumps significantly takes away time <br />from other projects such as city sewer cleaning, televising, assisting other <br />departments, snow removal, etc. In addition, the constant entering and exiting of <br />a confined space presents a safety risk that would be greatly minimized with the <br />addition of a grinder /grinder pump. <br /> <br />Respectfully submitted, <br /> <br /> <br />____________________________ <br />Steve Dazenski <br />Parks / Public Works Supervisor <br /> <br />Attachments: <br /> <br />1. Location Map <br />2. Aerial Image <br />3. E-mail from Steve Dazenski to Greg Lee, dated Feb 27, 2008 <br />4. Photographic documentation of a comparable grinder pump from Stillwater <br />