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It’s one of the oldest power sources on the planet, and one of the most environmentally friendly. Exelon Generation owns and operates two hydroelectric power plants: one run-of-the-river and one pumped storage.
It’s clean energy that costs less than other sources.

Hydroelectric energy generates power when flowing water spins a wheel or turbine. It’s a renewable energy source and produces no carbon, greenhouse gases or toxic byproducts.

When most people think of hydro, they think of the Hoover Dam: a massive wall that harnesses the power of a river. But hydroelectric facilities can also be quite low profile. Almost every state in the nation uses hydroelectricity, some more than others.

Exelon Generation owns and operates two hydroelectric power plants – one run-of-the-river and one pumped storage – along the Susquehanna River in Maryland and Pennsylvania. Conowingo Hydroelectric Generating Station and Muddy Run Pumped Storage Facility provide more than 1,600 megawatts of low-carbon power generation, as well as much needed load-leveling and 24/7 baseload power.

Conowingo: a case study in the power of hydro.

Conowingo is Maryland’s largest source of renewable electricity, producing more clean energy than all other sources combined. Unlike intermittent wind and solar generation, Conowingo’s power is 24/7, and can respond to changes in demand and supply extra energy to the grid within 10 minutes. If there’s a large-scale blackout, Conowingo is the first power plant called on to restart the regional electric grid.

The Conowingo power plant:

  • produces 1.6 million megawatt hours of electricity annually, enough to power more than 159,000 homes for a year. 
  • prevents 758,000 tons of greenhouse gas emissions, the equivalent of taking 150,000 cars off the road. 
  • the same as taking about 8 years to be equivalent to burning 2.8 million tons of coal.

Muddy Run: putting clean electricity on the area’s grid.

Muddy Run Pumped Storage Facility is a hydroelectric power plant located on the Susquehanna River. It has provided electric power to the regional transmission system since 1966.

The plant’s eight units can generate 1,070 megawatts of clean electricity, output that’s vital to meeting the demands on the area’s regional power grid.

To generate electricity, water in the upper reservoir at Muddy Run is used to fuel the turbines, flowing into the Susquehanna River. At night, the electricity demand decreases – so the units are reversed and used as pumps to fill the upper reservoir for use as fuel during subsequent peak-demand periods.

Exelon is a good neighbor within our local communities.

We support local communities and causes with charitable giving and sponsorships – typically driven by our employees. We encourage our employees to volunteer and give back to their communities. Exelon works to advance many important causes, including the environment, education, the arts and appreciation of diversity.

Learn more about Exelon Generation and the community

Exelon Generation’s culture and business practice make us safety-first.

Exelon Generation facilities employ sophisticated emergency response plans to protect public health and safety. Plans are reviewed and approved by state governments and federal regulatory agencies. Emergency planning includes coordination with local and municipal officials, and thousands of volunteers and first responders.

To protect the safety and health of our employees, contractors, customers and communities, we’ve implemented a number of initiatives to promote safe behaviors both on and off the job.

Exelon has a safety behavior observation program and focused initiatives on areas of high risk. We offer safety training, which is integrated with leadership development programs for supervisors and managers, as well as new employee orientation. And the safety peer group identifies successful pilot programs or new practices that can then be adopted by the entire organization.

Learn how Exelon always puts safety first