Cedar Hills

🌿 BiomassIPP Non-CHP5 MW capacity

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.

PeakingMid-meritBaseload0%40%80%100%1%
Peaking — intermittent or backup
Capacity5 MWnameplate
Annual Generation454 MWhEPA eGRID
Capacity Factor1%of theoretical max
Annual CO₂548metric tons

Location

Plant NameCedar Hills
OperatorBio Energy Washington, Llc
CityMaple Valley
CountyKing County
StateWashington
ZIP98038
Coordinates47.45583, -122.04278

This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.

Natural GasHydroelectricBiomassBattery Storage

Generators (18)

IDTechnologyFuelCapacityStatusOnline
1Petroleum LiquidsDistillate Oil0.3 MWOperating2009
10Petroleum LiquidsDistillate Oil0.3 MWOperating2009
11Petroleum LiquidsDistillate Oil0.3 MWOperating2009
12Petroleum LiquidsDistillate Oil0.3 MWOperating2009
13Petroleum LiquidsDistillate Oil0.3 MWOperating2009
14Petroleum LiquidsDistillate Oil0.3 MWOperating2009
15Petroleum LiquidsDistillate Oil0.3 MWOperating2009
16Petroleum LiquidsDistillate Oil0.3 MWOperating2009
17Petroleum LiquidsDistillate Oil0.3 MWOperating2009
18Petroleum LiquidsDistillate Oil0.3 MWOperating2009
2Petroleum LiquidsDistillate Oil0.3 MWOperating2009
3Petroleum LiquidsDistillate Oil0.3 MWOperating2009
4Petroleum LiquidsDistillate Oil0.3 MWOperating2009
5Petroleum LiquidsDistillate Oil0.3 MWOperating2009
6Petroleum LiquidsDistillate Oil0.3 MWOperating2009
7Petroleum LiquidsDistillate Oil0.3 MWOperating2009
8Petroleum LiquidsDistillate Oil0.3 MWOperating2009
9Petroleum LiquidsDistillate Oil0.3 MWOperating2009

Emissions (annual)

CO₂548 metric tons
SO₂1 metric tons
CO₂ Rate2415 lb/MWh
U.S. grid average800 lb/MWhNatural gas combined-cycle average900 lb/MWhCoal plant average2,100 lb/MWhThis plant2,414 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.

Grid context

NERC RegionWECC
Balancing AuthorityPuget Sound Energy

About Biomass plants

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.

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