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S D Warren Westbrook

Cumberland County, Maine · EIA plant ID 50447 · Operator: Elevate Power Management LLC
OtherConventional HydroelectricWood/Wood Waste BiomassISONEBA: ISNE
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Nameplate70MWSummer 64 MW
Generators16in service
Net generation15GWh12 mo to Dec 2025
Capacity factor0%other units, summer MW
Heat rate—Btu/kWhfossil units, electric fuel, HHV
First online1903

Monthly net generation

EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
010203040GWh200120032006200820102012201420162018202020222025

Capacity factor by year

Net MWh ÷ (summer MW × hours), other units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
0%20%40%200520102015202020250.0% · 12 mo

Heat rate by year

Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
05,00010,00015,0002005201020152020
Annual data table
YearNet GWhCapacity factorHeat rate (Btu/kWh)
2001414.339.1%—
2002345.941.9%—
2003405.743.4%16,636
200542238.7%5,098
2006414.436.9%5,098
2007430.244.5%5,098
2008349.131.1%6,359
2009172.818.7%7,411
2010175.819.6%7,730
2011148.916.6%9,059
2012141.918.3%8,969
2013221.729.2%7,200
2014179.221.5%7,517
2015145.216.4%7,693
2016106.312.5%8,759
2017114.713.9%8,587
2018116.614.0%7,559
2019110.912.6%8,388
202094.711.4%7,776
202120.20.0%—
202215.80.0%—
202332.70.0%—
2025150.0%—

Generators

EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
Gen IDTechnologyPrime moverNameplate MWSummer MWOnlineStatusPlanned retirementOEM / model
GEN1Conventional HydroelectricHY0.60.6Jan 1903Operating—coming soon
GEN2Conventional HydroelectricHY0.60.6Jan 1903Operating—coming soon
GEN3Conventional HydroelectricHY0.60.6Jan 1903Operating—coming soon
GEN4Conventional HydroelectricHY0.80.8Jan 1913Operating—coming soon
GEN5Conventional HydroelectricHY0.80.8Jan 1913Operating—coming soon
GEN6Conventional HydroelectricHY0.80.8Jan 1913Operating—coming soon
GEN7Conventional HydroelectricHY0.60.6Jan 1940Operating—coming soon
GEN9Wood/Wood Waste BiomassST47.540.5Jan 1982Operating (Out of service)—coming soon
GN10Wood/Wood Waste BiomassST1515.8Oct 1985Operating (Out of service)—coming soon
GN11Conventional HydroelectricHY0.60.6Jan 1940Operating—coming soon
GN12Conventional HydroelectricHY0.20.2Jan 1940Operating—coming soon
GN13Conventional HydroelectricHY0.20.2Jan 1940Operating—coming soon
GN14Conventional HydroelectricHY0.20.2Jan 1940Operating—coming soon
GN15Conventional HydroelectricHY0.20.2Jan 1940Operating—coming soon
GN16Conventional HydroelectricHY0.50.5Jan 1940Operating—coming soon
GN17Conventional HydroelectricHY0.50.5Jan 1940Operating—coming soon
GEN8Wood/Wood Waste BiomassST1010Mar 1965Retired Jun 1999—coming soon
GN18Conventional HydroelectricHY0.40.4Jan 1987Retired Mar 2019—coming soon
GN19Conventional HydroelectricHY0.40.4Jan 1987Retired Mar 2019—coming soon
GN20Conventional HydroelectricHY0.40.4Jan 1987Retired Mar 2019—coming soon

Owner / operator

Operator: Elevate Power Management LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Elevate Power Management LLC100.0%70 MW

Nearby plants

Within 80 km.
Westbrook Energy Center Power Plant564 MW3.5 km
Regional Waste Systems13 MW3.6 km
Cross Town Energy Storage175 MW3.6 km
Larson5 MW5 km
Gorham Solar 1 (CSG)5 MW5.4 km
South Portland ESS, LLC—7.1 km