The downtown Chanhassen stormwater best management practice (BMP) retrofit assessment project will reduce watershed phosphorus loads to Rice Marsh Lake and improve the water quality in downstream Lake Riley, impaired for excess nutrients. This project will identify innovative BMP retrofit opportunities that target soluble phosphorus and promote infiltration and groundwater recharge within this highly-developed area. The downtown Chanhassen BMP retrofit assessment project will be performed in partnership with the City of Chanhassen.
This project will identify and prioritize opportunities to implement a multipurpose drainage management plan that will provide adequate drainage capacity, reduce peak flows and flooding and reduce erosion and sediment loading, improving water quality to the West Branch Rum River.
This is a joint grant application from the Riley-Purgatory-Bluff Creek Watershed District (RPBCWD) and the City of Chanhassen. In 2010, the Minnesota Pollution Control Agency listed Lake Susan as a shallow lake impaired for excess nutrients. A 2013 report recommended a project located at the park pond immediately northwest of Lake Susan as the most cost-effective watershed implementation project. The project calls for an outlet control structure at a higher elevation that will provide increased dead pool storage and the installation of a Minnesota Filter to treat dissolved phosphorus.
Past and current monitoring data has shown Ramsey County's Lambert Creek has high levels of total phosphorus (TP), anywhere from 0.14 mg/L to 0.30 mg/L, which is above the proposed State standard of 0.10 mg/L for streams in the Central Region.
Northern white cedar wetland plant communities provide unique ecological, economic, and wetland functions, including high value timber, long-term carbon storage, winter refuge for deer and other wildlife, wildlife habitat, and thermal buffering for brook trout streams. However, these plant communities have been declining in Minnesota for decades mostly as a result of development impacts. The Minnesota Board of Water and Soil Resources is using this appropriation to continue efforts aimed at improving the quantity and quality of white cedar wetland plant communities in Minnesota.
The purpose of this program is to provide cost share funding to community groups for the installation of community accessible rain gardens and other water quality projects in Ramsey County. The Ramsey Conservation District (RCD) in partnership with local property owners and Watershed Districts/Water Management Organizations will install 6-12 stormwater best management projects that will help protect and improve water quality of surrounding lakes, streams, rivers, and wetlands.
Capitol Region Watershed District is partnering with St. Paul Public Schools to implement a variety of highly visible Best Management Practices at Central High School that will improve the quality of stormwater discharged to the Mississippi River. A tremendous amount of sediment is discharged from the school annually due to the large impervious areas and lack of vegetation. Implementing the projects will reduce sediment by 86% and phosphorus by 90% over the target area annually.
The Project and Outreach Coordinator will facilitate efforts within the watershed to provide landowner support and assistance in identifying areas in need of conservation plans and best management practices. The coordinator would use the Watershed Protection and Restoration Strategy Report and county water plans to target and prioritize outreach and education to maximize water quality benefits. This will greatly multiply the number of educated landowners in the watershed and increase the number of projects implemented.
Capitol Region Watershed District will partner with local organizations and private landowners to implement a variety of cost-effective Best Management Practices in the East Kittsondale subwatershed. The urbanized condition of the 1,860 acre subwatershed results in an estimated 1,500 pounds of phosphorus, over 470,000 pounds of sediment, and significant concentrations of bacteria associated with that sediment being sent untreated to the Mississippi River each year. Those pollutants have contributed to several impairments within the river.
This project will continue collaboration with faith organizations in priority areas to implement stormwater volume reduction retrofit projects. Priority areas are defined as areas with limited to no stormwater treatment before reaching a water body and/or areas that drain to an impaired or at risk water.
At almost 4,000 acres, Trout Brook is the largest subwatershed in the Capitol Region Watershed District and the City of Saint Paul. The restored stream is part of the 42 acre Trout Brook Nature Sanctuary project, whose goal is to return the area back to some resemblance of its pre-industrialized valley of stream floodplain and wetlands. Monitoring results within the corridor show that phosphorus, sediments, bacteria, lead and copper are the pollutants of most concern.