BUT FIRST, WHAT IS A WATERSHED?
A watershed, sometimes known as a drainage basin, is the area of land that drains to one water body. Any drop of water that falls in the Mill Creek Watershed will make its way to the Mill Creek. As a result, what happens on the land and in the air throughout the mill creek watershed also impacts every community, individual, and business within the watershed.
The Mill Creek Watershed covers 166.2 square miles and encompasses thirty-seven political jurisdictions.
Stats on our watershed:
- The watershed is located in the Interior Plateau and Eastern Corn Belt Plains US EPA Level 3 Ecoregions.
- The Mill Creek main stem flows 28.1 miles through southeastern Butler County and central Hamilton County to its confluence with the Ohio River.
- From its origin elevation of approximately 797’ in Liberty Township, the stream falls an average of 11.8’/mile to an elevation of 466’ at its confluence with the Ohio River in the City of Cincinnati.
- Aquatic life uses for the streams in the Mill Creek watershed reflect the high degree of urban and industrial development that has occurred within the watershed.
- The Mill Creek is currently designated Warm Water Habitat from its headwaters in Butler County to river mile (RM) 7.3 in Hamilton County, and Modified Warm Water Habitat (MWH) for the lower eight miles of the stream, where the U.S. Army Corps of Engineers has permanently modified the channel.