Project: Thompson Lake Rainwater Garden
Location: Thompson Lake Regional Park, West St. Paul
Partners: Dakota County Parks, Dakota County Highway, Dakota SWCD, Metropolitan Council, DNR, and Association of Metropolitan SWCDs.
Design Components: Soil correction, underdrain system, curb cuts, overflow riser, and native plantings.
Technical Details: ~3000 SF with a ponding depth of 8". Total storage is approximately 15,000 gallons. Overflow riser set at 6" depth and emergency overflow to existing storm drain set at 8". Soils were overexcavated to a depth of 4' and replaced with 1.5' of sand and 1' of compost topsoil. A 6" perforated tile was placed in a wrapped rock channel and tapped into the existing storm sewer to serve as an underdrain. Thompson Lake Rainwater Garden Plan - PDF (138K).

Photos (2003):

2004

Project: Land 'O Lakes Infiltration Basin and Ravine Stabilization
Location: Inver Grove Heights
Partners: Land 'O Lakes, Dakota SWCD, Metropolitan Council, Emmons and Olivier Resources, Great River Greening, DNR, and Association of Metropolitan SWCDs.
Design Components: Pretreatment basins, filter swale, infiltration basin, and native plantings.
Technical Details: Treats 100-yr storm prior to discharge. Excavated soils from stormwater treatment area were used to stabilize the ravine.

Photos (2003):

Project: Johnson Pervious Paver Driveway
Location: Burnsville
Partners: Rick Johnson and City of Burnsville.
Design Components: Uni Ecostone pervious paver system.

Photos (August 17, 2004):

Project: Early Lake Bioretention
Location: Burnsville
Partners: Centex Homes, City of Burnsville, Metropolitan Council.
Design Components: Vegetated bioretention facility and compost soils.

Photos (2002):

Photos (2004):

Crystal Lake Raingarden Project
Location: Burnsville
Partners: Neighborhood Residents, City of Burnsville, Metropolitan Council.
Design Components: Installation of 17 rainwater gardens on 18 residential lots.
Cost: Design - $40,000 | Staff Time - $25,000 | Construction $43,000
         Plants $9,000 (Volunteer Labor)

Photos (2003):

For more information contact:
Dakota County Soil and Water Conservation District
4100 220th Street West, Suite 102
Farmington, MN 55024
651.480.7777 fax 651.480.7775