Channel erosion in the stream

 

City of Belle Plaine Streambank Stabilization

and Outlet Protection

Location:

T113N, R25W, Section 1, Blakeley Township

Watershed:

Minor Watershed #33089

Project:

¨ Streambank Stabilization

¨ Grade Stabilization

Prior Condition:

There was an eroding stream channel and culvert outlet along a DNR public watercourse within the city limits of Belle Plaine. Estimated soil loss was 53 tons per year. All soil loss was directly contributing to soil and nutrients into the stream.

Solution:

The streambank channel and banks were reshaped and armored with cable concrete and grassed waterways. Grade stabilization was achieved through outlet protection with rock riprap and a pipe, which conveyed stormwater down to the stream in a non-erosive manner. Erosion control blankets were installed on the channel and side slopes of the stream.

Reductions:

Soil saved: 53 tons per year

Phosphorus reduction:  80 pounds per year

Cost:

The total project cost was $68,018, with the city's portion being $47,168, and the remaining funding coming from the Scott WMO Cost-Share Program ($20,850). Contributing partners were the Scott Watershed Management Organization and the Scott Soil and Water Conservation District.