The purpose of this project is reduce peak flows in the North Fork of the Crow River through culvert sizing. Culvert sizing will typically result in smaller culverts, which will provide short-term temporary storage within channels and on adjacent lands upstream from road crossings. In addition to reducing peak flow rates, flood damage and downstream erosion, increased sediment and nutrient removal through extended detention time is expected.
The Middle Fork Crow River Watershed District is home to many natural resource organizations, all of which have a vested interest in the quality of local and regional resources. The District will provide financial assistance in the format of sub-grants to local partners to implement Best Management Practices to improve water quality.
Diamond Lake and its neighboring lakes feature numerous public water accesses, resorts, parks, and trails and are supported by the recreational and aesthetic values that good water quality provides. In 2006, Diamond Lake was placed on MPCA's List of Impaired Waters. Improving water quality in Diamond Lake to meet state standards is a top-ranking priority for the district.
The Middle Fork Crow River Watershed District will conduct a river assessment to determine the scope of eroding riverbanks and a stormwater modeling project to identify targeted locations for stormwater management. The river assessment will: 1) verify that streambank erosion is the major contributor of pollutants, including sediment, Phosphorus, and Nitrogen; 2) catalog and quantify the erosion, and; 3) provide an assessment of reductions that could be achieved using specific solutions.
The Greater Blue Earth River Basin Alliance (GBERBA) along with Soil and Water Conservation Districts, Counties, landowners, and drainage authorities in the ten member counties will install conservation drainage practices to improve water quality. 103E drainage systems with documented sediment or water quality issues are the focus with the goal of installing 52 practices such as improved side inlets (grade stabilization structures), alternative tile inlets, denitrifying bioreactors, saturated buffers, storage wetlands and others.
The North Fork Crow River Watershed District will develop an inventory and inspection database for 103E ditches under their drainage authority. The district will acquire a database software solution to conduct field inspections and to track ditch maintenance projects throughout the district. This software will be used to facilitate statutory compliance including developing a process for completing annual inspection and reporting requirements.