Main District and Subdistricts

The Miami Conservancy District is comprised of a Main District (flood protection) and two subdistricts, the Aquifer Preservation Subdistrict (water stewardship) and the River Corridor Improvement Subdistrict (river recreation).


Flood Protection

Our Main District is responsible for an integrated flood protection system that significantly reduces flood risk from the Great Miami River in cities from Piqua to Hamilton. The system includes five dry dams, storage basins, 55 miles of levee, and preserved thousands of acres of floodplain. Together, the dams have stored floodwaters more than 2,100 times since construction was completed in 1922. The Miami Conservancy District's flood protection system is known around the U.S. and the world. 


Water Stewardship

Our Aquifer Preservation Subdistrict supports stewardship of the region's water resources. MCD's water stewardship efforts work to protect and improve the quantity and quality of water for people living and working within the Great Miami River Watershed.

MCD's non-regulatory role focuses on technical data, analysis, and expertise. Staff collects data along area rivers and aquifers, hosts events and educational programs, and builds awareness of water and water-related causes. MCD collaborates with elected officials and community leaders, providing them with valued insight to support the region's overall health, vitality, and growth.

According to the official plan of the APS, the purpose is to "develop and maintain an ongoing, watershed-wide program in support of comprehenisve protection, management, and understanding of the region's water resources; to implement improvements and actions necessary in order to accomplish said purpose; and to work with existing federal, state, local, and regional agencies toward that purpose". 



Our River Corridor Improvement Subdistrict enhances public use and enjoyment of river corridors by utilizing improvements, amenities, and activities within and along the river corridors. Whether you like to fish, paddle or cycle, you'll find plenty of opportunity in the Dayton region. More than 40 years ago, MCD built the first 8-mile bike trail loop in downtown Dayton, a trail segment that has become the backbone of the largest paved trail network in the country, over 350 miles. And the region boasts more than 290 miles of rivers and streams to fish and paddle. These waterways are so awesome, they've been designated by the state of Ohio and nationally by the U. S. Department of the Interior for their excellence.