September 19, 2011
The guidance document is intended for the states’ use as they consider integrating biological information into their UMR CWA programs. It is focused on the interstate UMR main channel and is scoped to evaluate existing methods and indices.
This September 2011 document is intended for use by the states as they consider integrating biological information and assessment approaches into their Upper Mississippi River Clean Water Act programs. It is focused on the River's main channel and examines the efficacy of existing tools in supporting biologically-based assessment of aquatic life use attainment.