About the River and the Dam

Conowingo Dam fact sheetConowingo Dam is located on the Susquehanna River about 10 miles upstream from where it flows into the Chesapeake Bay at Havre De Grace, Maryland.

Owned and operated by Exelon Corporation, the dam has been trapping sediment from the Susquehanna River, blocking fish passage, and affecting the water quality of the Bay since it was built in 1928.

Conowingo’s federal license is now up for renewal, offering us a historic opportunity to improve the health of the lower Susquehanna and the water quality of the Chesapeake Bay. Learn more »

Relicensing Conowingo Dam

Conowingo’s owner, Exelon, operates the dam for profit. Exelon must obtain a license from the Federal Energy Regulatory Commission (FERC) to continue to operate the dam. A renewed federal license will apply to the facility’s operations for the next 30 to 50 years, providing a rare opportunity to repair the damage caused by Conowingo Dam. This is a once-in-a-generation opportunity to address Conowingo’s environmental impacts, bring the dam’s operation up to modern environmental standards, and renew the health of the Lower Susquehanna and the Chesapeake Bay. While FERC’s proposed license conditions fail to address Conowingo’s legacy of environmental damage, the state of Maryland has an opportunity to do better. Provisions in the federal Clean Water Act require Exelon to meet all state water quality standards at Conowingo. This gives the State of Maryland an opportunity to require license conditions that will improve the health of lower Susquehanna River and the Chesapeake Bay. Learn more »

Conowingo Dam and the Chesapeake Bay

The Susquehanna River has a drainage area of 27,000 square miles and is the Chesapeake Bay’s largest source of freshwater. It also contributes much of the Bay’s pollution. Millions of tons of polluted sediment and nutrients from the Susquehanna watershed are trapped behind Conowingo dam. Some interests are trying to use the Conowingo Dam relicensing as an excuse to distract from, or even abandon, local programs that are reducing pollution. We can’t let this happen – local pollution is driving our local water quality. To make meaningful progress in the Bay cleanup effort, we must address the impacts of the Conowingo Dam AND continue our local programs to reduce pollution, which are working to clean up the Bay. Learn more »