Kaiser Aluminum Trentwood Works
Large load · 15000 E Euclid Ave, Spokane Valley, WA
Kaiser Aluminum Washington, LLC owns and operates the Trentwood aluminum rolling mill in Spokane Valley, Spokane County. The mill produces aluminum sheet, plate and coil used mainly in aerospace. A 2000 news report said the mill uses about 50 megawatts of electricity.
Overview
The facility produces aluminum sheet, plate, and coil through the melting and alloying of aluminum, casting of ingots, and rolling. The Trentwood facility is running at full capacity due to increased aerospace demand.
Profile
- Electricity and grid
- In 2000 the mill used about 50 megawatts of electricity along with natural gas. In 2000 Trentwood, with 50 megawatts, was to remain at full production under a new BPA contract. A 2019 Avista filing says Sovereign/Kaiser DES provides load control services to Kaiser's Trentwood plant.
- Ownership
- Kaiser Aluminum Washington, LLC owns an aluminum rolling mill and metal finishing plant at Trentwood, Spokane County, Washington.
- Recent changes
- Kaiser finished a $25 million expansion at its Trentwood rolling mill, with $415 million invested at the Spokane Valley plant over two decades. Shipments improved 11% year-over-year in the third quarter of 2026 on capacity added by the Phase VII investment.
Facility
- Activity
- Aluminum sheet, plate and coil rolling for aerospace and general engineering
- Industry
- Manufacturing
- Site type
- Facility
- Operating status
- Operating
Reported Jul 22, 2026
- Demand flexibility
Permits and agreements
- Permit
- NPDES permit WA0000892
Related records
Timeline
- Nov 6, 2025
- Kaiser finished a $25 million expansion at its Trentwood rolling mill.
Kaiser Aluminum completes $25M expansion at Trentwood facility | Spokane Journal of Business
- Oct 21, 2026
- Kaiser reported third quarter 2026 shipments up 11% on Phase VII capacity at Trentwood.
Kaiser Aluminum Corporation Reports Third Quarter 2026 Financial Results :: Kaiser Aluminum Corporation (KALU)