Sunrise River Chain of Lakes Carp Management
Common carp reduction within the West Branch of the Sunrise River chain of lakes will address multiple nutrient impairments. This project will remove ~11,000 carp by box netting to achieve a carp biomass of 89 lbs/ac which is the threshold above which carp impact lake health. Removals will occur in Martin & Typo Lakes (~85% of effort) & Linwood Lake (~15%). Estimated pollutant reductions are 12,300 lbs-TP with a 10-year duration of benefits (1,230 lbs-TP/yr) resulting in a cost effectiveness of $15/lb-TP at Martin & Typo Lakes & $179/lb-TP at Linwood Lake.
Anticipated accomplishments include: (a) achieving water quality standards in moderately impaired Martin Lake, (b) dramatically improving severely impaired Typo Lake, (c) positioning slightly impaired Linwood Lake for delisting through watershed BMPs, & (d) benefitting priority downstream waters of the Sunrise & St. Croix Rivers.
Assurances of reaching carp & water quality goals are high. Carp reduction goals in Martin & Typo Lakes are 50% complete & yielding statistically significant water quality improvement. Beginning in 2017, Legacy funds enabled removal of 11,000+ carp, reducing biomass by 35% (75% goal). Additionally, eight watershed BMPs have been installed or will soon be installed. New record low phosphorus concentrations in Martin Lake each of the last 3 years has it near delisting. Typo Lake had a record low in 2018. Linwood Lake is near delisting.
Carp removal benefits will be long lasting. Carp in Martin & Typo Lakes have not had a strong spawning year class in 25+ years, & no young carp are present in possible nursery areas. Barriers have been installed to prevent carp from migrating between spawning & overwintering habitats, or recolonizing.
The carp removals proposed in this application are directed by University of MN scientists, the 2nd most cost effective of 23 ranked projects, & are high priorities in local & state plans. The $148,000 request is matched by $37,000 in local funds.
Annie Felix-Gerth
(b) $16,000,000 the first year and $16,000,000 the second year are for grants to local government units to protect and restore surface water and drinking water; to keep water on the land; to protect, enhance, and restore water quality in lakes, rivers, and streams; and to protect groundwater and drinking water, including feedlot water quality and subsurface sewage treatment system projects and stream bank, stream channel, shoreline restoration, and ravine stabilization projects. The projects must use practices demonstrated to be effective, be of long-lasting public benefit, include a match, and be consistent with total maximum daily load (TMDL) implementation plans, watershed restoration and protection strategies (WRAPS), or local water management plans or their equivalents. A portion of this money may be used to seek administrative efficiencies through shared resources by multiple local governmental units. Up to 20 percent of this appropriation is available for land-treatment projects and practices that benefit drinking water.
We will remove approximately 11,000 carp to achieve a biomass of 89 lbs/ac which is the threshold above which carp impact lake health according to research at the Univ. of MN. Direct & indirect phosphorus reductions are estimated at 1,230 lbs/yr.
Grant funds funded this project to remove 2,646 carp from the Sunrise River chain of lakes.
LOCAL LEVERAGED FUNDS