Meadow Lake Drawdown and Alum Treatment
Meadow Lake is a small, urban lake in the City of New Hope. The lake is listed as an impaired water for excess nutrients and suffers from nuisance levels of curly-leaf pondweed and fathead minnows. Reducing watershed phosphorus (P) loading to the lake has been a priority since implementation of the lake's TMDL and several BMP's have been installed. However, internal P loading to the lake is still significant and preventing improvement in the lake's condition. In this project, internal P loading to Meadow Lake will be reduced by approximately 110 lbs/year through a lake drawdown and two aluminum sulfate treatments. Step one will be a winter 2021 drawdown to consolidate sediments and to control the fathead minnows and freeze out the curly-leaf turions. Two doses of aluminum sulfate will follow in spring 2022 and 2023 to control P release from lake sediments. Anticipated outcomes of the project include reduced lake P loading and improved water clarity, reduced chlorophyll-a concentrations, and a diverse native aquatic vegetation community. This project also includes water quality, sediment, fish, and submersed aquatic vegetation (SAV) monitoring.
Annie Felix-Gerth
(a) $13,591,000 the first year and $13,375,000 the second year are for performance-based grants with multiyear implementation plans to local government units. The grants may be used to implement projects that protect, enhance, and restore surface water quality in lakes, rivers, and streams; protect groundwater from degradation; and protect drinking water sources. Projects must be identified in a comprehensive watershed plan developed under the One Watershed, One Plan or metropolitan surface water management frameworks or groundwater plans. Grant recipients must identify a nonstate match and may use other legacy funds to supplement projects funded under this paragraph.
Reduce internal P loading by 110 lbs/yr
Improve water clarity and chl-a to meet the NCHF shallow lake standard
Eliminate the fathead minnows
Reduce curly-leaf pondweed density and restore native vegetation community
Consolidate lake sediments
This project followed up from a previous whole-lake drawdown and alum treatment with a lake sediment alum treatment, water quality monitoring and SAV survey.
LOCAL LEVERAGED FUNDS