Watershed Achievements Report

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Minnesota Red River Basin River Basin Watershed Achievements Report 2015 Red River Basin Projects completed Bois de Sioux Watershed Bois de Sioux Watershed Nutrient Load Assessment Snake River Watershed Grand Marais and Snake River Watesheds HSPF Modeling – July 2014 Red River Basin Two Rivers Roseau River Tamarac River Snake River Thief River Grand Marais Creek Red Lake River Upper and Lower Red Lake Clearwater River Sandhill River ! Marsh River Wild Rice River Legend Buffalo River ! ! ! Approved Lake TMDL Approved Stream TMDL Otter Tail River ! ! ! ! Watershed Projects ! County Boundary Major Watershed Basin Boundary New ! ! New and Active Active Bois De Sioux R. Mustinka River ! ! ! ! ´ ! ! Completed ! ! ! ! ! 0 15 30 Miles ! Minnesota ! ! ! ! ! ! ! ! ! ! Minnesota Pollution Control Agency www.pca.state.mn.us 94
Minnesota Watershed Red River Basin River Achievements Basin Report 2008 Watershed Achievements Report Statewide 2015 Bois de Sioux Watershed Bois de Sioux Watershed Nutrient Load Assessment Bois de Sioux Watershed with North Ottawa Drainage Basin The main purpose of this project is to monitor phosphorous nutrient loading at the North Ottawa Impoundment site in the Bois de Sioux Watershed and to assess the potential for the capture, removal and reuse of phosphorus from the watershed through aquatic plant management (primarily cattails) growing within Pool C of the impoundment. MPCA completed a pollutant load monitoring process between 2007 and 2009 to look at Minnesota watersheds and their contributions of TP and TSS. The Bois de Sioux Watershed is listed among the moderately high watersheds in the state with P yields ranging between .153- .377 lbs. /ac TP yield and 51-100 lbs. /ac TSS yield. Historically, the International Water Institute (IWI) has been monitoring at sites upstream and downstream of the North Ottawa site to measure any positive effects that this site has on water quality. This project reviewed historical monitoring results as a reference to support loading and removal potential. The project timeline, May-September 2014, allowed for summer sampling at targeted sites including the inlet, outlets and within the main retention pool (Pool C) in an attempt to gather baseline information as a reference for longer term monitoring. The project also included soil sampling and analysis work to collect baseline nutrient analysis within the three pools (A, B, C). Pools B and C within the impoundment are farmed unless there is a need to hold water beyond the capacity of Pool C. There is a need to understand watershed nutrient pathways and processes to help define a statistical range of input/output P and N for off channel flood storage sites. This information will lead and support best practices for managing existing sites and for planning and design across the watershed and where future impoundments will be constructed. Goals • Gather and review existing water quality data for project site. • Targeted monitoring of North Ottawa impoundment to measure nutrient loading. • Establish potential nutrient (phosphorus) removal potential through vegetation harvesting and removal. Results that count • Targeted monitoring at inlet and outlet of the impoundment from this project have yielded significantly different results when compared to historical data collected to measure water quality conditions and North Ottawa impoundment effects on water quality improvement. • Targeted monitoring of impoundment at inlet and outlets reflects the following reductions after treatment through the impoundment: P 38%, N 70%, TSS 84%. Pool C of the North Ottawa impoundment for the Bois de Sioux Watershed Minnesota Pollution Control Agency www.pca.state.mn.us 95
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Watershed Achievements Report 2015
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a Success Story . . . Lake Shaokata
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Cedar River Watershed and Shell Roc
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Introduction Watershed Achievements
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Watershed Achievements Report

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