Grand Rapids

Hydro power plant in Michigan, United States of America. Approximate location 45.3547, -87.6494.

HydroMichiganUnited States of America

Grand Rapids is a 8 MW hydro power plant in Michigan, United States of America. It is operated by Wisconsin Public Service Corp. Based on reported annual generation of 24 GWh, it can supply roughly 6,828 homes. It ranks #5059 of 9,833 United States of America power plants by installed capacity. Commissioned in 1931, it is around 95 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).

8MW installed capacity
24GWh reported / yr
6,828homes powered
1931commissioned (~95 yrs)

Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0001787.

Reported generation trend

2013: 30 GWh20132014: 33 GWh20142015: 36 GWh20152016: 18 GWh20162017: 41 GWh20172018: 32 GWh20182019: 24 GWh201941 GWh

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

Owner

Operated by Wisconsin Public Service 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 45.4°N — which shapes how much energy it can produce and how its output varies through the year.

6.4°Cannual mean temp
4,318heating degree-days (base 18°C)
112cooling degree-days (base 18°C)
196 melevation

Monthly mean temperature

J: -9 °CJF: -7 °CFM: -1 °CMA: 5 °CAM: 12 °CMJ: 17 °CJJ: 20 °CJA: 19 °CAS: 15 °CSO: 9 °CON: 2 °CND: -5 °CD20 °C

Heating degree-days here run 76% 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 #738 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

Location

Coordinates 45.3547, -87.6494 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

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