This project will set water quality goals for the Minnesota portions of the watershed, recommend allocations for achieving total maximum daily loads where waters do not meet Minnesota state standards and are listed as impaired, and recommend management strategies for those Minnesota waters meeting state standards. This project also recognizes that as monitoring continues in the watershed, additional impairments may be identified.
The Drinking Water Contaminants of Emerging Concern (CEC) program identifies environmental contaminants for which current health-based standards currently do not exist or need to be updated, investigate the potential for human exposure to these chemicals, and develop guidance values for drinking water. Contaminants evaluated by CEC staff include contaminants that have been released or detected in Minnesota waters (surface water and groundwater) or that have the potential to migrate to or be detected in Minnesota waters.
This project will maximize the utility and usefulness of three HSPF models that have been constructed and calibrated for hydrology. The contractor will identify and reduce parameterization errors in the following three HSPF models: 1) Buffalo River Watershed, 2 ) Thief River Watershed, 3) Bois de Sioux-Mustinka Watersheds. This will result, not only in a better hydrology calibration, but will also improve each of the models’ ability to more accurately estimate sediment and pollutant loads and concentrations.
This project will include analysis of existing and newly collected water quality data to verify the impairments on the currently listed reaches and to determine the status of the remaining river reaches as being either impaired or currently meeting standards. Stakeholder involvement and public participation will be a focus throughout the Watershed Approach Project. The project provides an opportunity to assess and leverage the capacity for the local community to engage in the process of watershed management and to adopt protection and restoration practices.
This project will finalize the Hydrologic Simulation Program FORTRAN (HSPF) watershed model construction and complete the calibration/validation process. The consultant will produce an HSPF watershed model that can readily be used to provide information to support conventional parameter TMDLs. The consultant will clearly demonstrate that this model generates predicted output timeseries for hydrology, sediment, nutrients, and dissolved oxygen which are consistent with available sets of observed data.