Mill C

Mill C is a 6 MW hydro power plant in New York, United States of America. It is operated by New York State Elec & Gas Corp. Based on reported annual generation of 27 GWh, it can supply roughly 7,657 homes. It ranks #5378 of 9,833 United States of America power plants by installed capacity. Commissioned in 1969, it is around 57 years old — an older, legacy facility. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, hydro supplies about 5.3% of United States of America's electricity; the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).

Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0006486.

Reported generation trend

Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by New York State Elec & Gas Corp. All plants by this company →

Local climate & thermal context

This hydro plant converts the energy of falling or flowing water through hydro turbines. It sits in a warm-summer humid continental climate (Köppen Dfb) — Northern Hemisphere, latitude 44.7°N — which shapes how much energy it can produce and how its output varies through the year.

Monthly mean temperature

Heating degree-days here run 75% above the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.

Climate heat-demand index: 88/100 — this site sits in the top third of the power plants we cover by heating degree-days.

In colder climates, uninsulated hot equipment (boilers, turbines, valves, steam lines) loses proportionally more heat to ambient air — exactly the loss Inzonex modular insulation is designed to cut.

Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.

How it compares & nearby plants

The #810 largest hydro power plant of 1449 in United States of America by capacity.

United States of America has 1449 hydro power plants in this dataset, together about 101,657 MW of capacity.

Nearby power plants

• Cadyville · Hydro · 6 MW · New York
• Clinton LFGTE Facility · Waste · 6 MW · New York
• Kent Falls · Hydro · 12 MW · New York
• Lower Saranac Hydroelectric Facility · Hydro · 7 MW · New York
• Saranac Facility · Gas · 286 MW · New York
• High Falls - Saranac NY · Hydro · 15 MW · New York

Location

Coordinates 44.6967, -73.6122 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.