# Griffith Energy LLC

CAISO asset profile · https://askthegrid.com/assets/facilities/griffith-energy-llc

## Current generation inventory

EIA plant 55124 · Inventory reporting month: 2026-08.

- natural gas: 655 MW operating nameplate
- Capacity basis: operating_generator_nameplate_mw
- Source inventory: [EIA-860M workbook (preliminary)](https://www.eia.gov/electricity/data/eia860m/xls/august_generator2026.xlsx)
- Inventory retrieved: 2026-10-10T02:12:40.665346+00:00
- Filed coordinate (longitude, latitude): -114.1333, 35.054029
- OSM extract: 2026-10-08T20:21:06Z
- OSM mapped edit: 2023-11-23 19:26:28+00:00
- Map prepared: 2026-10-10T02:28:23.002647+00:00

Battery power (MW) and stored energy (MWh) are separate measures. Shared physical-site membership does not establish electrical connectivity, settlement or a common export limit.

## Reviewed overview

Griffith Energy LLC is a 655 MW natural gas fired combined cycle plant in Mohave County. Griffith Energy is a gas-fired combined-cycle power plant in Mohave County, Arizona, near Kingman and the California and Nevada borders, rated at 570 MW. ArcLight Capital Partners agreed in 2020 to acquire it from Star West Generation. It sells summer capacity and electricity to a regional load-serving entity under a long-term contract.

## Reviewed metrics

- **Nameplate capacity:** 655 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 55124 — plant-55124

## Facts

- **Technology:** Natural Gas Fired Combined Cycle
- **Operator:** Griffith Energy LLC

## Related parties

- **Former owner / seller:** Star West Generation — former_owner
- **Parent company:** Oaktree Capital Management — parent_company ([source](https://www.oaktreecapital.com))
- **Former owner:** LS Power — former_owner ([source](https://www.lspower.com))
- **Former owner / seller:** PPL Corporation — former_owner ([source](https://www.pplweb.com))
- **Former owner / seller:** Duke Energy North America — former_owner

## Sources

- [ippjournal.com](https://ippjournal.com/update/arclight-signs-agreement-to-own-570-mw-griffith-energy-combined-cycle-gas-fired-power-plant-in-mohave-county) — ippjournal.com · public_source — Source retained for exact-record publication review.
- [lspower.com](https://www.lspower.com/news/ls-power-closes-deal-griffith-energy-facility/) — lspower.com · public_source — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/griffith-energy-llc
Website: [ArcLight Capital Partners](https://www.arclightcapital.com)

Source: Ask the Grid — https://askthegrid.com/