1996-04-25_AgendaPacket - Laserfiche WebLink

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~R~G'D APB? 1 ~ 1~96~ ~~p~ ~_~ -- - - _- _ April 9, 1996 Mark Maloney Grass Lake Water Management Organization City of Shoreview 4600 Victoria Street Shoreview, MN 55126 RE CITY OF ROSEVILLE PROJECT ST-96-09 BENNETT LAKE STORM SEWER Dear Mr. Maloney: As part of its 1996 construction projects, Roseville is proposing to install a storm sewer between Bennett Lake and the recently constructed American Legion ponds on the east side of Victoria Street. Stormwater from the American Legion ponds flows north under County Road C to Lake Owasso. In 1973, the normal water level of Bennett Lake was lower than the normal water level of Lake Owasso. A pumping station was installed to relieve Bennett Lake during heavy storm events. Over time, the normal water level of Bennett Lake has raised. to a point where it is now higher than the normal water level in Lake Owasso. Coupled with that is the fact that the existing pumping system, which was installed in 1973, is becoming obsolete and too expensive to operate. The City is proposing to connect Bennett Lake to the American Legion ponds with a 24" storm sewer. A copy of the plan is included as part of the permit. The storm sewer is proposed to have a gate valve included to provide the City with some control over the amount of flow to the American Legion ponds. It is proposed to leave the existing system intact to use, since the gravity system has been designed to carry the 10-year storm. A copy of the drainage calculations, prepared by Barr Engineering, is enclosed as part of the permit. Please contact me at 490-22.23 if you have any questions regarding this matter or would like to discuss it further. Sincerely, Tony A. Thury Project Coordinator TAT:cy Enclosures 2660 CIVIC CENTER DRI~~"E ~ ROSE~'ILI.E ~ 1II\`tiESOTA ®55113-1599 612-490-2200 • TDD 612--I90-??05