112th largest plant in Washington · 6865th nationally
Cedar Hills is a biomass power plant in Washington with a nameplate capacity of 5.4 MW. It generates roughly 454 MWh per year — enough to power about 43 average U.S. homes.
Its capacity factor of 1% reflects intermittent or peaking operation. At 2415 lb CO₂/MWh, its emission rate sits above the national grid average of roughly 800 lb/MWh.
| Plant Name | Cedar Hills |
|---|---|
| Operator | Bio Energy Washington, Llc |
| City | Maple Valley |
| County | King County |
| State | Washington |
| ZIP | 98038 |
| Coordinates | 47.45583, -122.04278 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 1 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 10 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 11 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 12 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 13 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 14 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 15 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 16 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 17 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 18 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 2 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 3 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 4 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 5 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 6 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 7 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 8 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| 9 | Petroleum Liquids | Distillate Oil | 0.3 MW | Operating | 2009 |
| CO₂ | 548 metric tons |
|---|---|
| SO₂ | 1 metric tons |
| CO₂ Rate | 2415 lb/MWh |
Annual totals and CO₂ rate reported by EPA eGRID for 2023. Reference averages are approximate U.S.-wide figures from the same dataset.
| NERC Region | WECC |
|---|---|
| Balancing Authority | Puget Sound Energy |
Biomass plants burn wood, agricultural waste, or methane from landfills to generate steam and electricity. They are considered carbon-neutral over long timescales when fuel is sustainably sourced, but they produce particulate emissions similar to coal.