Competitive Grants Program
The CD 8 Sediment Reduction Project is located southwest of the City of Roseau, outletting into the Roseau River approximately three miles upstream of the city. The stated purpose of the project is to reduce sediment deposition into the river by 277 tons by stabilizing field outlets, installing drop structures in gullies, and stabilizing eroded channel banks.
CD 8 was constructed in 1911 and was designed to handle moderate flooding based upon the drainage practice of the time. Current drainage practices and land use changes have resulted in the excessive transport into the river. The sediment reduction plan targets sites identified as being the greatest contributors of sediment into the ditch system and the Roseau River from data generated in the Site Prioritization Study of 2015.
- Retain 277 tons on topsoil of the landscape
- Reduce maintenance costs for individual landowners on the ditch system and the river
- Reduction of turbidity in surface water discharged into the Roseau River, which is listed as impaired due to turbidity (MPCA)
- Reduce phosphorus discharged into the Roseau River from the CD 8 system benefitted area by 227 tons annually.
- Reduce “flashiness” of hydrograph within the ditch system by regulating discharges from targeted locations
- Reduce frequency and duration of minor flooding on properties located in the lower portion of the sub-watershed
Projected Project Cost: $147, 700
Status: Funded FY 16/17
The Roseau River Watershed District has installed 8 side inlets and 2 rock drop structures. Plans for the 2017 construction season include channel stabilization and additional side inlets.
Roseau County Soil and Water Conservation District, Private Landowners