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HomeMy WebLinkAboutLake_Edina_Summary1960s1930s 2021 Lake Edina Watershed District: Nine Mile Creek Public water ID: 27002900 Lake Management Diverse aquatic vegetation is critical to the health of Edina Lakes—providing food and shelter for sh and waterfowl and improving water quality. Invasive plant species within the lake are shown above. Curly-leaf pondweed can be harmful to overall lake health. The invasive, non-native aquatic plant grows under the ice during the winter and grows in early spring, often crowding out native species. It dies in late June and early July, much earlier than other native species. As curly-leaf pondweed decays, phosphorus is released into the water, fueling algal production and causing oxygen depletion which can lead to sh kills. Eurasian watermilfoil is a rooted, submerged aquatic plant, and purple loosestrife is a colorful, perennial wetland plant. Both species outcompete native plants, and neither provides suitable shelter, food, or nesting habitat for native animals. Denotes current Lake Edina drainage area; historical drainage areas may have varied 2015 General submerged aquatic plant treatments stop with the implementation of Edina’s Lakes and Ponds policy, which prioritizes treatment based on a series of factors, including water body size, level of impairment, citizen involvement, and public use. 1978 The MN DNR issues a permit to control submerged plants in Lake Edina. 2015 Water balance study is completed by NMCWD; results indicate low water levels are primarily the result of lower- than-average snowpack during the winter of 2014–2015. 2016 Based on water quality indicators, the Minnesota Pollution Control Agency lists Lake Edina as impaired due to excessive nutrients. 2017 The Minnesota DNR lists Lake Edina as infested with Eurasian watermilfoil. 2019 Water quality study developed by the NMCWD. The report shows water quality in Lake Edina is highly inuenced by the water quality of the upstream Lake Cornelia. Accordingly, the primary recommended management strategy is to address water quality conditions in Lake Cornelia. 2020 The City of Edina begins efforts to control curly-leaf pondweed. Eliminating this invasive species improves the native aquatic plant community. 2020 Water quality report for NMCWD shows poor water quality. 2020 NMCWD completes an alum treatment on Lake Cornelia, expected to lower phosphorus levels in both Cornelia and downstream Lake Edina. 2020 The Minnesota Pollution Control Agency completes a Total Maximum Daily Load (TMDL) study. A TMDL identies pollution sources and and estimates pollution reductions needed to meet water quality standards. 2008 First observations of curly-leaf pondweed (CLP) in Lake Edina. The plant is found periodically over the next 13 years. 2020-2021 High phosphorus concentrations encourage excessive growth of blue-green algae. Blue-green algae can be harmful if it is ingested, inhaled, or comes in contact with the skin. Aquatic Plants Water LevelsWater Quality Water quality data is available from the Nine Mile Creek Watershed District for the years 2012, 2015, 2017, and 2020. Summer-average highs and lows of water quality parameters over those years are provided above. The available data shows Lake Edina generally fails to meet the state's goals for shallow lakes. Elevated total phosphorus levels promote algal growth, which reduces water clarity. Recent water quality data Algae Level (Chlorophyll-a) Water Clarity Total Phosphorous Levels 20 g/L 60 g/L 146 59 State goalsHighestLowest 77 16 4 ftMax ft Min Lake Edina is a shallow lake located in southeast Edina, just east of Highway 100 and north of Industrial Boulevard. There is no public access to Lake Edina. The Nine Mile Creek Regional trail passes along the west side of the lake for 0.3 miles. Non-motorized boats only. Amenities:Lake depth Land use 2022: Land use within the watershed is mainly low-density residential, with smaller portions of high-density residential, commercial, institutional (Cornelia Elementary School), park, wetland, and open-water areas. 24 acres surface area 1.0 mile shoreline 2.9 ft Mean2 3 395 acres drainage area History of Lake Edina How You Can Help Steps that you can take to help Lake Edina include: Curly-leaf pondweed Purple loosestrife Eurasian watermilol Learn more about these strategies at ninemilecreek.org 100 NMCWD = Nine Mile Creek Watershed District Interactive ood map Water resources library Find more information from the City of Edina: 1964-2002, 2012-2022 Water level data is from the Minnesota Department of Natural Resources and Nine Mile Creek Watershed District. Lowest recorded water level: 818.0 ft (February 9, 1982) Highest recorded water level: 825.4 ft (July 24, 1987) 1.0 Meters 0.2 Meters 0.8 Meters Installing rain gardens and planting shoreline buffers Cleaning up grass clippings and leaves Participating in the adopt-a-drain program (mn.adoptadrain.org) Redirecting gutter downspouts towards vegetated areas Minimizing use of fertilizer on lawns