Cedar/Shell Rock/Winnebago watersheds Hydrologic Simulation Program FORTRAN (HSPF) model extensions

The United States Environmental Protection Agency requires the Minnesota Pollution Control Agency (MPCA) to carry out the Total Maximum Daily Load (TMDL) program in the state of Minnesota. Minnesota has an abundance of lakes and river reaches, many of which will require a TMDL study. In an effort to expedite the completion of TMDL projects, the MPCA has decided to construct watershed models. These models have the potential to support the simultaneous development of TMDL studies for multiple listings within a watershed. Previously developed Hydrologic Simulation Program FORTRAN (HSPF) models are now out of date since new meteorological and stream monitoring data has become available. With new information and more water quality data it is necessary to update and extend the existing HSPF models. This work order will extend the Cedar, Shell Rock, and Winnebago River Watershed models in the Cedar River Basin.