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Posts tagged "Prior Lake Outlet Channel"

Low Flow Gate on Prior Lake Outlet Channel Closed

Posted by PLSLWD Staff - January 8, 2016 - News

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The Low Flow Gate on the Prior Lake Outlet Channel was closed on January 8, 2016 at 2:00 pm after the Prior Lake level reached 902.45 feet.  The Low Flow Gate was originally opened on December 21, 2015 as a result of unseasonably high lake levels. Prior to the opening of the Low Flow Gate, Prior Lake was at 902.91 feet and water was cascading over the Prior Lake Outlet Structure. The goal of opening the Low Flow Gate was to increase upstream storage space and to release extra water from the lakes in order to free up space to hold spring snowmelt.

View Full Article Low Flow Gate, PLOC, Prior Lake Outlet Channel

Low-flow Gate Opened on the Prior Lake Outlet Channel

Posted by PLSLWD Staff - December 22, 2015 - News

Unseasonably warm temperatures coupled with several rainfall events have resulted in unusually high water levels on Prior Lake for this time of the year. As of December 21, Prior Lake was at 902.91 feet and water was cascading over the Prior Lake Outlet Structure, which is set at 902.50. Since the Outlet Structure and Channel was installed in 1983, records indicate there were only three other instances where the water level exceeded 902.7 in December.

Greg Wilson, the consulting engineer on the City’s and District’s Stormwater Management and Flood Mitigation Study, ran a new Hydraulic and Hydrologic Model to determine the benefit of opening the Outlet Structure’s low flow gate, which can draw the lake down to 902.0 feet. Opening the gate speeds up the flow of water that heads down the seven plus mile channel that outlets into the Minnesota River. Measurements taken by District staff last week indicate that many lakes, ponds and wetlands may be nearly full now and may not have much storage capacity if the area experiences appreciable rain or significant snowmelt runoff in the spring. Lack of water storage increases the risk of flooding.

After running the model, Mr. Wilson recommended that the District apply to the Minnesota Department of Natural Resources for a permit to temporarily open the low flow gate. Permission was granted to open the gate until the water level on Prior Lake reaches 902.50. District Staff opened the low flow gate at 12:45 p.m. on Monday, December 21.

View Full Article Low Flow Gate, PLOC, Prior Lake Outlet Channel

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Prior Lake – Spring Lake Watershed District

The District covers about 42 square miles in Scott County, MN. Water in the PLSLWD flows mainly from the southwest to the northeast through Spring, Upper Prior and Lower Prior Lakes, and then north through the Prior Lake Outlet Channel to the Minnesota River near Valley Fair amusement park.
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Prior Lake - Spring Lake Watershed District
4646 Dakota Street SE
Prior Lake, MN 55372

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