Since 1981, Mercer has developed or co-developed numerous hydroelectric facilities in New York State, including the largest privately owned facility east of the Mississippi River.

• Mt. Ida, a 2,900 kW facility in Troy
• Fort Miller, a 5,000 kW facility in Washington County
• Valley Falls, a 2,500 kW facility in Rensselaer County
• Glen Park, a 32,000 kW facility in Watertown
• Stillwater Reservoir, a 2,000 kW facility in Herkimer County

and, in California:

• Box Canyon, a 5 MW facility on the Sacramento River