06-09-2004 Council Agenda - Laserfiche WebLink

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* .. if Lake Gervais is threatened with high water you agreed that the pipe could be blocked with sandbags until the high water threat has passed. We think the definition for implementing this action should be consistent with the Little Canada and Maplewood Ordinances defining high water and thus suggest that: The sandbags will be placed by (please define who) when the Lake Gervais level reaches 860.0 ft above mean sea level and only be removed after the Lake Gervais' level has receded below 860.0 ft and remained below 860.0 ft for 3 consecutive days. 2. Possible new waters from the I -35E /I -694 Unweave the Weave project. a. We understand that this project will more than double the hard area surface of the roadways within this right -of -way. At the MN DOT meeting with the Little Canada staff we asked if there would be any new waters flowing into the Gervais basin as a result. We were told no as the total acreage remains the same. With the additional hard surface the runoff would flow faster, but it would be captured and slowed down in some 17 ponds that will be constructed within the project area. Then at our recent meeting you said that there will be additional waters. b. Who is right? If there is additional water runoff help us understand why. Have additional waters been considered when the ponding areas were designed? c. Please confirm that there will be no new waters flowing from Twin Lake, or from Vadnais Heights, into the roadway project area which would subsequently flow to Lake Gervais. 3. Possible new waters from the next phase of the I -694 reconstruction. a. With the next phase in the reconstruction of I -694, from just east of Rice St. to I -33W, it would seem that there will again be new concerns for storm water runoff. b. Please confirm that there will be no waters flowing to Lake Gervais from the Owasso - Grass Lake Area Water Management Organization, or from the Rice Creek Watershed District, or from the Vadnais Lake Area Water Management Organization or any other source as a result of this future roadway construction project. 4. New waters from the Maplewood Mall area. a. The lands west of Maplewood Mall, along the Highway 61 auto corridor, along Hazelwood St., along Highway D and on the south side of Beam Ave. all seem poised for major development projects in the very near future. b. Please confirm that the runoff waters from each of these areas will be fully contained in local ponding and slowed down before any gets to the Beam Ave. water cleansing area. Also please confirm that the water flow rate out of the Beam Ave. cleansing area into the Kohlman and Gervais lakes will be no higher than it is now as a result of these future developments. Page 2 - 1 0 -