SI-3F (11/10/04 version)
Overview, "As Is" Stream Integrity Situation: Large Rivers
Assessing Large Rivers
Recent data is available for all but 1 of the 23 large rivers in Ohio. The top three causes of large river water quality impairment are bacteria, habitat modification and sediments, in that order.
- Map showing attainment status;
- Summary Data;
- NPS impairment causes (PDF 8kb) for individual large rivers.
Large River Priority Areas
TMDLs and local watershed action plans are completed or underway for portions of many of the large rivers in Ohio. Summary status information is available.
The Scioto River mainstem is in attainment due to significant investment in point source controls over the past 20 years.
However, a number of the
tributaries are not in attainment due to NPS causes, ranging from a low of zero attainment to a high of 88% attainment. Consequently, the
Scioto CREP will invest $20.7 M in agricultural management practices and permanent conservation easements in this 6,300 square mile watershed. There are specific sediment, phosphorus and nitrogen reduction targets associated with Scioto CREP implementation.
- The Maumee and Cuyahoga Rivers are priority Ohio watersheds for the Lake Erie LaMP Habitat Strategy;
- The Great Miami River watershed is a priority area for exploring the viability of water quality credit trading.