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CCP 07-28-2003
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CCP 07-28-2003
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<br />. <br /> <br />. <br /> <br />. <br /> <br />URS <br /> <br />Thresher Square <br />700 Third Street South <br />Minneapolis. MN 554J5 <br />Phone: (612) 370-0700 <br />Fax: (6J2) 370-13783 <br /> <br />To: <br /> <br />Aaron Parrish/Arden Copy: <br />Hills <br /> <br />Tom Moore/Arden Hills File: <br />Jim Perron/Arden Hills <br />Nick Landwer/URS <br /> <br />37951-005 <br /> <br />From: Gregory Brown, PE <br />Arden Hills City Engineer <br /> <br />Date: July 28, 2003 <br /> <br />Subject: Karth Lake Pumping Station <br /> <br />Based upon the July 21, 2003 Council W orksession, the City Engineer is proceeding with final <br />design and advertisement for bids for the proposed Karth Lake pumping station. The following is <br />a brief summary of the proposed improvements, estimated project cost and schedule: <br /> <br />Proposed Improvements <br /> <br />The system would include one submersible pump mounted in a floating pump raft with fish <br />screens (approximately 6' X 6' ) that would be anchored in the lake when pumping is desired. <br />The floating pump raft would be connected with power cord and a discharge hose to a small <br />utility vault located on shore in an accessable location (ie buried along a trail). The utility box <br />would include a connection to a permanent buried forcemain (approx. 4" diameter) and <br />permanent electrical power source (underground) to operate the pump. A small surface mounted <br />control panel would also be located at the utility box to provide basic on/off operation for the <br />pump. The buried forcemain will traverse Cummings Park and connect to existing storm sewer <br />piping in Cummings Park Drive and ultimately flow to Valentine Lake. The attached exhibits <br />illustrate the forcemain alignment and water route to Valentine Lake. . The buried electrical will <br />traverse Cummings Park underground and be connected to a power source in the new shelter <br />building or an existing power pole or underground vault. <br /> <br />When in operation, City maintenance personnel will check on the pumping system daily and if <br />alarms are registered similar to a lift station. The pumps will be turned off when the desired lake <br />elevation has been achieved as determined by monitoring of the lake gage. The drawdown will be <br />slow and likely drop the lake only 1-2" per day depending on weather conditions. Once the <br />desired drawdown is complete City maintenance personnel will remove the pump raft and <br />disconnect the power cord and discharge hose from the utility box and place the equipment in <br />storage leaving only the small control panel and utility vault in place on site. <br /> <br />ClDocuments and SettingslPangS\Local Settingslremporary brternet FileslOLK271C<>unciJ Agenda Item 7 A Memo 7.28--03.doc <br />
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