Watershed Achievements Report
wq-cwp8-18
wq-cwp8-18
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Minnesota Upper Mississippi River Basin River Basin <strong>Watershed</strong> <strong>Achievements</strong> <strong>Report</strong> 2008 2015<br />
Twin Cities <strong>Watershed</strong><br />
Villa Park Wetland Enhanced TP<br />
Removal Project<br />
In 2009, the Capitol Region <strong>Watershed</strong> District (CRWD)<br />
completed the Villa Park Wetland Management Plan<br />
that identified multiple projects/solutions to dealing<br />
with the elevated phosphorus loads that were entering<br />
the lake. This study was a comprehensive analysis of<br />
the system and reviewed and analyzed a large amount<br />
of monitoring data that was collected from 2005-2007.<br />
The solutions identified in the study were determined to<br />
be implemented in a sequential order. The first step in<br />
the suite of solutions was to increase the dead storage<br />
in the wetland cells of the Villa Park system. This called<br />
for the removal of approximately 20,000 cubic yards<br />
within a fully developed neighborhood park in Roseville,<br />
Minnesota.<br />
The goal of the project is to increase phosphorus removal<br />
efficiency of the Villa Park Wetland System and to protect<br />
the excellent water quality of Lake McCarron’s. The<br />
project goal is accomplished by the following project<br />
objectives:<br />
• Removal 17,360 cubic yards of sediment from Wet<br />
Pond, Wet Cell 5, and Wet Cell 1.<br />
• Improve residence time and create additional storage<br />
in each of the basins resulting in improved total<br />
phosphorus removal.<br />
• Increase phosphorus removal by an estimated 118 lbs/<br />
yr.<br />
The project was completed during the summer of 2013<br />
through hydraulic dredging methods and dewatering<br />
through geotextile tubes with a total project cost of $1.4<br />
million. Approximately 2/3rds of the sediment removed<br />
had high levels of polycyclic aromatic hydrocarbons<br />
(PAHs) and arsenic which required disposal in a landfill.<br />
Goals<br />
• Removal of accumulated sediment in Villa Park Ponds.<br />
• Protect and improvement of wildlife and vegetation in<br />
Villa Park Ponds.<br />
• Document and publicize the project for use in other<br />
areas of CRWD and Minnesota. The project is estimated<br />
to increase phosphorus removal by 118 lbs/yr.<br />
Villa Park 2013 dredging<br />
Results that count<br />
• 17,360 cu yds of sediment was dredged from the<br />
ponds and 12,762 cu yds were hauled and disposed,<br />
approximately 2/3 of which was Level III and disposed<br />
of in certified landfills. The balance was Level II and was<br />
reused for industrial land uses.<br />
• Hydraulic dredging limited the impact to vegetation<br />
and wildlife. Several turtles were relocated prior to the<br />
project and a couple of acres of invasive cattails were<br />
removed as part of the project.<br />
• Water quality in two locations of the Villa Park system<br />
was monitored continuously throughout the project.<br />
This data coupled with monitoring for the previous 8<br />
years will provide a clear picture of the effectiveness<br />
of the project. CRWD has presented this project at the<br />
2013 Minnesota Water Resources Conference and the<br />
2013 Minnesota Association of <strong>Watershed</strong> Districts<br />
(MAWD) Annual Conference. Several entities have<br />
requested information about the project including<br />
Minnesota Department of Transportation (MNDOT) and<br />
the City of Ottawa, Canada.<br />
Financial information<br />
Funding type: CWP loan amount: $430,000<br />
In-kind: $0<br />
Matching funds: $967,480<br />
Contact information<br />
Bob Fossum, Program Manager<br />
CRWD<br />
1410 Energy Park Drive Suite, St. Paul MN 55108<br />
651-644-8888, bob@capitolregionwd.org<br />
MPCA Project Manager: Brooke Asleson<br />
Minnesota Pollution Control Agency www.pca.state.mn.us 112