Main District & Subdistricts

  • Miami Conservancy District

    Colonel Edward Deeds designed, built and donated the MCD headquarters. Deeds served on the MCD Board of Directors from 1915-1954 and was its first board president.

MCD is divided into a Main District (flood protection) and two subdistricts – the Aquifer Preservation Subdistrict (groundwater) and the River Corridor Improvement Subdistrict (river fun).

Main District

MCD’s Main District protects riverfront cities along the Great Miami River from flooding. MCD’s dry dams and levees have protected cities from Piqua to Hamilton for nearly 100 years. By the end of 2016, together, the five dams had stored floodwaters more than 1,882 times since the system was finished in 1922. The system is known around the country and the world. Officials from other states and countries have visited MCD to learn more about the flood protection system.

Aquifer Preservation Subdistrict

The Dayton region is home to one of the most abundant aquifers in the country. More than 1.5 trillion gallons of good quality drinking water are stored in the region’s underground layers of sand and gravel. MCD created the Aquifer Preservation Subdistrict to develop and maintain an ongoing, watershed-wide program to support comprehensive protection and management of the Great Miami River Watershed’s water resources. MCD monitors groundwater levels, conducts water studies and tests water. And because rivers and streams interact with groundwater, MCD also works to improve the quality of water flowing in our region’s rivers.

River Corridor Improvement Subdistrict

MCD created the River Corridor Improvement Subdistrict to enhance public use and enjoyment of river corridors utilizing improvements, amenities and activities within and along the river corridors. Whether you like to fish, paddle or cycle, the Dayton region has you covered. 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, with 340 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 as well as nationally by the U. S. Department of the Interior for their excellence. Download a copy of one of our river recreation maps to show you the best places to get onto the river. Or request a bike map.