Merwin

Power plant · Hydro

Key facts

Power plant · Hydro Operating

Commissioned: 1931
Net generation, 2025: 422,567 MWh
Grid: 115 kV to PacifiCorp (PACW)
Location: Cowlitz County, Washington
Operated by: PacifiCorpSourceEIA-860M Preliminary Monthly Electric Generator Inventory

Net generation MWh by year, 2001 to 2025

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All 6 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory

Attributes
Attribute	Value
Gem	Unit ids G100000603903 Location id L100000603865
Grid	Nerc region WECC Report year 2025 Grid voltage kv 115 Transmission owner PacifiCorp Balancing authority code PACW Balancing authority name PacifiCorp - West
Fuel burned (MMBtu), 2025	1,441,798
Capacity factor, 2025	0.355
Net generation (MWh), 2025	422,567
Balancing authority code	PACW

4 sources

Sources

EIA-860M Preliminary Monthly Electric Generator InventoryOpen license · retrieved 4 Nov 2026
Global Energy Monitor — Global Integrated Power Tracker (unit-level power plants, eight technologies, all statuses)Open license, with credit · retrieved 26 Oct 2026Global Integrated Power Tracker, Global Energy Monitor, September 2026 release (https://globalenergymonitor.org/projects/global-integrated-power-tracker), CC BY 4.0. Modified by Inframation: TransitionZero-sourced rows removed; statuses and technologies mapped to Inframation's vocabulary; figures aggregated. Copyright © Global Energy Monitor. Global Integrated Power Tracker, September 2026 release. Distributed under a Creative Commons Attribution 4.0 International License.
EIA Open Data bulk file — Electricity (ELEC.zip; monthly plant net generation and fuel consumption since 2001)Open license · retrieved 1 Nov 2026Source: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
EIA-860M Preliminary Monthly Electric Generator Inventory