# Bonneville

BPA asset profile · https://askthegrid.com/assets/facilities/bonneville

U.S. Army Corps of Engineers, Portland District - Multnomah County - BPAT

Bonneville Dam is a conventional hydroelectric plant in Multnomah County, Oregon, with 16 operating generating units and a combined nameplate capacity of 979.8 MW. The dam sits on the Columbia River about 40 miles east of Portland, at River Mile 146.1, forming the border between Oregon and Washington. It was built and is operated by the U.S. Army Corps of Engineers, with the power it produces marketed and sold by the Bonneville Power Administration. The plant consists of a first powerhouse whose ten original units entered service between 1938 and 1944 (later rewound to 62.1 MW units) and a second powerhouse of eight 66.5 MW units completed in 1981, plus a small 13.1 MW auxiliary unit that powers the fish-ladder water-supply system.

## Metrics

- **Nameplate capacity:** 979.8000000000002 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 3075 — plant-3075

## Facts

- **Technology:** Conventional Hydroelectric

## Related parties

- **Operator:** USACE Northwestern Division — EIA-listed operator for the Bonneville plant ([source](https://www.nwd.usace.army.mil/))
- **Power marketer / transmission owner / balancing authority:** Bonneville Power Administration — Federal power marketer; balancing authority and transmission/distribution owner ([source](https://www.bpa.gov/))
- **Equipment supplier:** Voith — Turbine manufacturer for Powerhouse 1 ([source](https://www.voith.com/))
- **Equipment supplier:** Allis-Chalmers — Turbine manufacturer for Powerhouse 2 main units
- **Equipment supplier:** Sulzer/Escher-Wyss — Fish-unit turbine manufacturer for Powerhouse 2

## Sources

- [mbrweb.ferc.gov](https://mbrweb.ferc.gov/SearchlkpEIA/Index?page=35) — mbrweb.ferc.gov · authoritative — Source retained for exact-record publication review.
- [public.crohms.org](https://public.crohms.org/tmt/documents/fpp/2026/final/FPP26_02_BON_03-25-2026.pdf) — public.crohms.org · public_source — Source retained for exact-record publication review.
- [uscode.house.gov](https://uscode.house.gov/view.xhtml?edition=prelim&path=%2Fprelim%40title16%2Fchapter12B) — uscode.house.gov · authoritative — Source retained for exact-record publication review.
- [bpa.gov](https://www.bpa.gov/-/media/Aep/power/hydropower-data-studies/fcrps_brochure_17x11.pdf) — bpa.gov · authoritative — Source retained for exact-record publication review.
- [nwcouncil.org](https://www.nwcouncil.org/history/USArmyCorps/) — nwcouncil.org · public_source — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/bonneville
Website: [U.S. Army Corps of Engineers](https://www.nwp.usace.army.mil/)

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