07-22-1991 Council Packet - Laserfiche WebLink

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I t. quality problems, including blooms of potentially toxic algae, are developing in Lake Minnetonka. The water quality monitoring of Lake Minnetonlui and its tributaries »h«U be overseen by a committee aimpnsed of water quality experts and intwated ♦mhvHiuate from cooperating governmental agencies including, but-itot limited to< tha LMCD, DNRt PCA; MeSroylii a n Cowwilt Suburban Ha iiwpin Pa rks. Wa tfa lwd DM»trK>ti nnd inifaa fd lakea hore oommunitiesi—The LMCD shad convene* th« c<*mmiHg». (( omment: This paragraph forms the basis for paragraph 2, p.8] Maiatala or restore the water quality of Lake Minnetonka to allow continued use of the lake for piiamry contact recreation and buss-pan sportfishing. [Comment; This forms purtiul bnais for p^lcy # 2 on p.8] As a preliminary goal, a mean summer total phosphorus concentration of 50 ug/1 will bo aot i owcop* m Ha teted'fc Bay i Tano ge*’ and Arm Comment: portion of acntcnca, found in para J, p. 8 under policy # I ] The LMCD shall work through the Minnehaha Creek Watershed District to reduce the levels of phosphorus in the outflows from several small lakes previously impacted by vsastewater treatment plant effluent. [Comment: this senteme l»etame basis for policy #2, pJ) Internal phosphorus loads derived from the sediments of Langdon Lake. French Lake, Tanagrr Lake, and Peavey Lake are significant sources of phosphorus reaching Lake Minnetonka. The Watershed District plans to address these problems shall be supported by other managing entities. [Comment: lorms basis of para. I, under policy #2 on page 8] IS>38 Tim fifit Gfoy hound a re built a t tho Mmfwtowka few* W«wks [('omment; see previ MS conMMnta on footnotes] 3.Minimize (be impacts of non'iiutat pollution on tbc quality of Lake Minnetonka and its tributaries, by enutroUing urfina and agricultural storm«rater runoff and erosion, and other nf^toprtala maaagcmcat pmctkts. [Comment: bcaim< policy # 6, p.lO] Tbn LMCD sbnll Wfh waih tlm Wa f ra hnd foUowing oi' Wjt#f and ifola nd Ruluii [Comment' not needed, also tone problem) stormwater runoff according to the regioaal detention basin reoomiiieiided by the U.S. EPA Nationwide Urban Runoff Program (NURP). [Camm rnt imms basis far para. 1, nndcr policy 6 on p. 10] On-aitc or repooal deteotioa of stormwater runoff shall also be required for developments in any land use category, regardless of impervious surface area, if iu stormwater runoff would otherwise be diacharged directly to a lake or to a stream discharging to the lake without passing through an intervening wetland or properly siaed regional stormwater detention basin capdide of improving siorawaler runoff quality. Wherever possfole. stormwater deteotaoo hmins. b(Hh regkmal and on-site, should be constructed EP-8