Watershed Achievements Report

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Minnesota Upper Mississippi River Basin River Basin Watershed Achievements Report 2008 2015 Twin Cities Watershed Villa Park Wetland Enhanced TP Removal Project In 2009, the Capitol Region Watershed District (CRWD) completed the Villa Park Wetland Management Plan that identified multiple projects/solutions to dealing with the elevated phosphorus loads that were entering the lake. This study was a comprehensive analysis of the system and reviewed and analyzed a large amount of monitoring data that was collected from 2005-2007. The solutions identified in the study were determined to be implemented in a sequential order. The first step in the suite of solutions was to increase the dead storage in the wetland cells of the Villa Park system. This called for the removal of approximately 20,000 cubic yards within a fully developed neighborhood park in Roseville, Minnesota. The goal of the project is to increase phosphorus removal efficiency of the Villa Park Wetland System and to protect the excellent water quality of Lake McCarron’s. The project goal is accomplished by the following project objectives: • Removal 17,360 cubic yards of sediment from Wet Pond, Wet Cell 5, and Wet Cell 1. • Improve residence time and create additional storage in each of the basins resulting in improved total phosphorus removal. • Increase phosphorus removal by an estimated 118 lbs/ yr. The project was completed during the summer of 2013 through hydraulic dredging methods and dewatering through geotextile tubes with a total project cost of $1.4 million. Approximately 2/3rds of the sediment removed had high levels of polycyclic aromatic hydrocarbons (PAHs) and arsenic which required disposal in a landfill. Goals • Removal of accumulated sediment in Villa Park Ponds. • Protect and improvement of wildlife and vegetation in Villa Park Ponds. • Document and publicize the project for use in other areas of CRWD and Minnesota. The project is estimated to increase phosphorus removal by 118 lbs/yr. Villa Park 2013 dredging Results that count • 17,360 cu yds of sediment was dredged from the ponds and 12,762 cu yds were hauled and disposed, approximately 2/3 of which was Level III and disposed of in certified landfills. The balance was Level II and was reused for industrial land uses. • Hydraulic dredging limited the impact to vegetation and wildlife. Several turtles were relocated prior to the project and a couple of acres of invasive cattails were removed as part of the project. • Water quality in two locations of the Villa Park system was monitored continuously throughout the project. This data coupled with monitoring for the previous 8 years will provide a clear picture of the effectiveness of the project. CRWD has presented this project at the 2013 Minnesota Water Resources Conference and the 2013 Minnesota Association of Watershed Districts (MAWD) Annual Conference. Several entities have requested information about the project including Minnesota Department of Transportation (MNDOT) and the City of Ottawa, Canada. Financial information Funding type: CWP loan amount: $430,000 In-kind: $0 Matching funds: $967,480 Contact information Bob Fossum, Program Manager CRWD 1410 Energy Park Drive Suite, St. Paul MN 55108 651-644-8888, bob@capitolregionwd.org MPCA Project Manager: Brooke Asleson Minnesota Pollution Control Agency www.pca.state.mn.us 112
Upper Minnesota Watershed Red St. Croix River Mississippi River Basin River Achievements Basin Basin River Basin Report 2008 Watershed Achievements Report Statewide 2015 Upper Mississippi River Basin Active projects Newly awarded in 2014 and 2015 Clearwater River Watershed Clearwater River Watershed Alternative Tile Intakes Project – 2014 Sponsor: Clearwater River Watershed District Funding: Section 319 (Grant) $45,000.00 Purpose: This project will install up to 120 open tile intakes that filter out nutrients and sediments, providing 700 pounds per year of total phosphorus load reduction from priority crop land. It will also document reduction in farmer and tile contractor resistance to the use of alternative tile intakes. Educational materials will be produced, demonstrating the benefits, effectiveness and utility of alternative tile intakes from environmental and economic standpoints, as well as applicability throughout the state. Long Prairie River Long Prairie River Dissolved Oxygen TMDL Implementation – 2013 Sponsor: Todd SWCD Funding: Section 319 (Grant) $300,000 Purpose: Implement 25-30 BMP’s in the Long Prairie Watershed and increase DO levels such that they are consistently above 5 mg/l. This would delist the Long Prairie as an impaired water body. Morrison, Douglas, and Todd SWCDs will be the primary partners on the project since they are the primary counties with land in the watershed. It is anticipated that projects implemented will annually reduce 1,409 pounds of phosphorus, 716 tons of sediment and 6,771 pounds of nitrogen from reaching the Long Prairie River system. These reductions will decrease algae growth and result in higher DO readings. Mississippi River – Brainerd Platte River Restoration/Protection Project – 2015 Sponsor: Morrison SWCD Funding: Clean Water Partnership (Grant) $34,900 Purpose: Through a combination of rock, streambarbs and bio-engineering, the stream channel will be slightly modified to deflect the river’s energy away from the bridge abutments and the eroded banks. Through this combination of practices erosion will be reduced and long term stabilization can be achieved. The bioengineered components and riparian buffer will also add aquatic and pollinator habitat with water quality benefits. The water quality improvements predicted are decreased water turbidity, decreased sediment load of the river by 39.6 tons/yr., and stabilization of the north bank of the river. Swan River Headwaters Subwatershed Restoration – 2015 Sponsor: Todd SWCD Funding: Clean Water Partnership (Grant) $38,650 Purpose: Grant dollars would be used to install riparian buffers and restore a series of sediment ponds to keep nutrient rich runoff from flowing into several local lakes and the Swan River. Riparian landowners in this area, both agricultural producers and shoreland residents, have agreed that work is needed and are willing to implement these strategies to restore water quality in this area. These projects would improve conditions for fish and invertebrate communities. The efforts outlined in these projects would increase cooperation between the shoreland and agricultural communities and encourage a conservation ethic throughout this area. Mississippi River – Grand Rapids Big Sandy and Minnewawa Lakes Phosphorus Reduction – 2014 Sponsor: Aitkin County SWCD Funding: Section 319 (Grant) $86,100 Purpose: This project will implement phosphorus reduction strategies for the Big Sandy Lake Watershed, as outlined in the Big Sandy Lake and Lake Minnewawa TMDL Implementation Plan. BMP demonstration projects will be installed, including 2 rain gardens and 5 shoreline stabilization projects. We estimate a reduction in phosphorus pollution of 9,145 lbs/yr, and a reduction in sedimentation of 5,165 tons/yr. One hundred rain barrels will be distributed at a reduced cost to critical landowners. Septic system inventories Minnesota Pollution Control Agency www.pca.state.mn.us 113
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