21.12.2015 Views

Watershed Achievements Report

wq-cwp8-18

wq-cwp8-18

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

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

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!