The Capitol Region Watershed District, in cooperation with the City of Roseville, completed the Villa Park Wetland Project in 2004 to enhance protection of Lake McCarrons’ water quality. The Villa Park Ponds were artificial wetlands constructed in 1985 to protect Lake McCarrons in Roseville. The wetlands contained shallow pools of water arranged in a “step-down” manner along with wetland plants. They were designed to capture sediments and phosphorus-laden particles in stormwater runoff that drains over 700 acres of land before it reaches the lake. Over time, large stormwater flows and erosion have reduced the effectiveness of the wetland. This has resulted in excessive sedimentation deposits and nuisance aquatic plant growth in the lake. The Villa Park Wetland Modification Project will restore the ponds by constructing four permeable weirs that will be anchored by steel piles. In addition, a secondary outlet structure will be modified in order to improve the effectiveness in handling large stormwater flows.
How it works:
An assessment recommended removing pipes that connected the wetland ponds, re-building berms, and constructing weirs that have stabilized overflow elevations. This stabilized system increases the amount of time water has contact with wetland plants and soils which removes phosphorus from the water before it reaches Lake McCarron’s.
Owner: Capitol Region Watershed District
Contractor: Park Construction, Minneapolis, MN
Engineer: TKDA, Inc., St. Paul, MN
Phosphorous Removal Estimate: 278 pounds of phosphorous per year. Watershed Treated: 700 acres