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ge <br />•I <br />; ‘ <br />1 <br />AL <br />d <br />December 12, 1976 <br />To: Wm. B. Van Nest <br />From: C. P. Pesek <br />Comments on Upper Watershed Storage and Retention Project <br />Objectives <br />The stated objectives are: <br />1. Mitigate the effects of storm water runoff which hac s <br />increased urbanization of the area surrounding Lake MinnetiJka/''®"’ <br />S" S«"”‘ " •'<•■■ <br />4. Increase ground water infiltration from upstream reservoirs. <br />5. Stabilize the lake level and the flow of Minnehaha Creek. <br />e!!Dlain'’whfthe«®^h®®'"/®®®°"®‘’’^ t»e report does not adequately <br />wtselTspent“"® strongly made, there is a question if the money is <br />Analysis of Watershed Runoff <br />^ ■ I <br />t <br />Appears to be very thorough and professional. <br />Construction Plan <br />®^P]ained. For example, “gabions" are described as "rin-ran" tn ha <br />placed over the silt and clay to prevent erosion - but “rip-rip" is lit defined <br />Nor IS the “slide control gate" that controls the flow of waJI?. <br />Expenditures and Operation <br />bllilt°'\hp®ta "“"tber of weirs that are to be 'Duiit. The $4,000.00 a year operations seems to be extremely low because the <br />wnnid"’ be constantly monitored and gates often opened and closed It would appear that maintenance on the weirs would be extensive each spring. <br />Questions <br />1. Who will decide when to open and close the gates? <br />2. Who will operate the system? <br />3. How important are the objectives? <br />i <br />4. What is the effect on the marshes if the normal water flow is interrupted?