145th largest plant in Idaho · 12336th nationally
Marco Ranch is a hydroelectric power plant in Idaho with a nameplate capacity of 1.2 MW. It generates roughly 2.3k MWh per year — enough to power about 217 average U.S. homes.
Its capacity factor of 22% reflects intermittent or peaking operation.
| Plant Name | Marco Ranch |
|---|---|
| Operator | Marco Power Inc |
| City | Jerome |
| County | Jerome County |
| State | Idaho |
| ZIP | 83338 |
| Coordinates | 42.63656, -114.55776 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | Water | 0.3 MW | Operating | 1985 |
| 2 | Conventional Hydroelectric | Water | 0.3 MW | Operating | 1985 |
| 3 | Conventional Hydroelectric | Water | 0.3 MW | Operating | 1985 |
| 4 | Conventional Hydroelectric | Water | 0.3 MW | Operating | 1985 |
| NERC Region | WECC |
|---|---|
| Balancing Authority | Idaho Power Company |
Hydroelectric plants spin turbines using falling or flowing water — typically from a dam-impounded reservoir. They are dispatchable, long-lived, and emission-free at the point of generation, though large reservoirs can disrupt rivers and ecosystems and methane can be released from flooded vegetation.