1995-04-27_AgendaPacket - Laserfiche WebLink

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GRASS WATER AGE NT ORGA TION AGENDA ITEM Date: 4/27/95 Prepared b j~ Karl P. Keel Item: A-2 1 ~L Organizational Items Item Description: Staff reports on pending matters -New developments/projects within Roseville affecting the GLWMO: a. School district redevelopment at Owasso/Western/Dale Following a presentation by representatives of the school district, the GLWMO Board, at its January 30, 1995, meeting, passed a resolution. forwarding the following comments to the City of Roseville Planning Commission and City Council.. Comments regarding current status follow each item. (1) The potential pumping from Wetland Basin 5 should be analyzed with regard to flooding on Lake Owasso. Some properties, especially on Sandy Hook Drive, are very susceptible to high. water levels on Lake Owasso. The pumped outlet to Lake Owasso is currently being routed to the east to a large DNR protected wetland at the corner of Western Avenue and South Owasso Boulevard. This wetland drains easterly underneath South. Owasso Boulevard to the large .wetland in Lady Slipper Park. This wetland is directly connected to Lake Owasso. The rate of discharge to Lake Owasso is very small compared to the total discharge to Lake Owasso. This additional discharge will have a negligible effect on high water levels in Lake Owasso. By routing the stormwater through an additional ponding system, the direct impacts to Lake Owasso will be further minimized. (2) The Board commended the school district for the proposed treatment of on-site run-off and encouraged the district to provide treatment for off-site drainage wherever feasibly possible. The current school district plans show some sort of treatment for all the stormwater generated on or entering the site. All the on-site drainage is routed through a minimum of one NURP basin. The off-site drainage west of Dale Street will be treated in a newly constructed grid chamber prior to its discharge into the existing wetland.