06-25-08 Council Agenda - Laserfiche WebLink

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general, the District's approach to managing wetlands is to achieve no net loss of acreage, function, and value. According to the District's wetlands management classification, the western portion of Savage Lake falls into Management Class 13 while the eastern basin is Management Class C (Barr, 2006 [draft]). Wetlands under Management Class B are considered high- quality wetlands that should be protected from development and other pressures of increased use, including indirect effects. This classification requires the maintenance of natural buffers to help retain wetland function as well as stormwater pretreatment (Minimum = 25 feet, Average = 50 feet). Wetlands in Management Class C are lower quality, less significant wetlands than those in Management Class 13, although still requiring stormwater pretreatment and protective buffers (Minimum = 12.5 feet, Average = 25 feet). The Minnesota Lake Eutrophication Analysis Procedure (MINLEAP) is a screening tool for estimating lake conditions and for identifying "problem" lakes. In addition, MINLEAP modeling has been done in the past to identify Minnesota Lakes which may be better or worse than they "should be" based on their location, watershed area and lake basin morphometry. Results from MINLEAP analysis suggest that the expected water quality in a minimally impacted lake, similar to Savage Lake (based on its location within the Central Hardwood Forest ecoregion and with its basic basin and watershed characteristics), would be expected to be within the following ranges for'I'P, Ch{ a, and SD; respectively: 47 to 88 tg /L, 13 to 49 µg /L, and 0.6 to 1.4 meters. 2.1.3.2 Recreational -Use Level Because the Nadeau Wildlife Area is adjacent to Savage Lake, recreational -uses of Savage Lake should include canoeing, picnicking, and aesthetic and wildlife viewing. There are also educational opportunities available in the park area. However, because Savage Lake is actually a District - managed wetland, it is not assigned a District recreational -use level. 2.1.3.3 Further Studies If the District identifies water quality in Savage Lake as a high priority, the first recommendation would be to collect additional lake information, including concurrent water quality, macrophyte, and fishery data, as there is currently no data available for Savage Lake related to these parameters. Barr Engineering Company 13 P ?Mpls \23 MN162 \2362924\ MovedFromMpls_P \2162924 \Other Proj h,fo \Report_lufoJndividual LSRs_I1107\ Savage \Savage_Lake_Status Roport.doc 51