Conowingo Dam

The Conowingo Dam (also Conowingo Hydroelectric Plant, Conowingo Hydroelectric Station) is a large hydroelectric dam in the lower Susquehanna River near the town of Conowingo, Maryland. The medium-height, masonry gravity dam is one of the largest non-federal hydroelectric dams in the U.S., and the largest dam in the state of Maryland. The dam sits about 9.9 miles (16 km) from the river mouth at the Chesapeake Bay, 5 miles (8 km) south of the Pennsylvania border and 45 miles (72 km) northeast of Baltimore, on the border between Cecil and Harford counties. The dam is privately owned by the Susquehanna Electric Company, a subsidiary of Constellation Energy. The dam supports a 9,000-acre reservoir, which today covers the original town of Conowingo. During dam construction, the town was moved to its present location about 1 mile (1.6 km) northeast of the dam's eastern end. The rising water also would have covered Conowingo Bridge, the original U.S. Route 1 crossing, so it was demolished in 1927. U.S. Route 1 now crosses over the top of the dam. The Conowingo Reservoir, and the nearby Susquehanna State Park, provide many recreational opportunities.

Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).