CC 03-30-1981 - Laserfiche WebLink

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. COUNCILMAN JOHNSON: I would like to ask the engineer to indicate a little bit of how the 36 inch of the north/south (in- audible) 36 inches in diameter, relates to the industrial area to the west. Obviously that water would have to go somewhere after it leaves the settling basins and holding ponds. The 36 inch, I believe, as previously indicated, it's going to take more .than just that little bit (inaudible). MR. CHRISTOFFERSEN: The 36, the 30 inch ahd 36 along Lexington is proposed to begin to take storm water right at the very beginning. It will drain, tracing a line, it begins approximately mid-point of Red Fox Road, northerly along the north ramps of the interstate to the easterly portion of the drainage boundary. In part, it will drain down to Island Lake Road and then at this intersection with Grey Fox Road and then run diagonally, you might say back up to the point of beginning. That's the general area the 36 inch is proposed to drain. It would also conduct drainage after a major storm has occurred. It will also conduct drainage from the area of Shoreview, gener- ally south of Gramsie Road and east of the north-south road. I don't know the name of that particular street, but east of there to the drainage boundary. So that's where the existing drainage will corne from to this pipe along here. It will be introduced into the storm sewer system as it runs southerly to Grey Fox Road. MAYOR CRICHTON: Mr. Christoffersen, today, as I under- stand it, all of the drainage north of 694 crosses 694 in a southerly direction near Lexington Avenue and ends up in that ditch on Lexington Avenue. MR. CHRISTOFFERSEN: That's correct. MAYOR CRICHTON: This proposal would divert all of the Arden Hills area north of 694 and most of the Shoreview area north of 694 westerly through that other pond and more directly into Bethel Ditch or the Bethel property. So you are consider- ably reducing the amount of water going down Lexington Avenue, south of 694. MR. CHRISTOFFERSEN: That's correct. MAYOR CRICHTON: That reduction, as I understand it, is still not enough to enable Grey Fox Road's current sewer, storm sewer, to take what is left. MR. CHRISTOFFERSEN: That's correct. Assuming ultimate' . development. MAYOR CRICHTON: When you say all of the development, there won't be any more water coming (inaudible). MR. CHRISTOFFERSEN: Assuming the development, as proposed - with the outside detention basins and considering the areas as they have been developed. 13