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Comment Period

Knife River Company, Portable Rock Crusher

Air Quality General Order – Opportunity to request a public comment period

Feb. 10, 2020 - Feb. 25, 2020, 5 p.m.

Ecology is rescinding coverage under the air quality general order, as the company has ceased operations on a portable plant.

Knife River Company, based out of Boise, Idaho, submitted a Facility Report of Closure for its portable rock crusher No. 1, which operated in Eastern Washington and was covered under Washington's air quality general order.

We plan to rescind this coverage order as requested. We will hold a public comment period on the draft rescission order only if a written request is received by Feb. 25, 2020. 


Ecology issues general order permits to commercial sources of air pollution. A general order is a permit issued to similar sources of air pollution, instead of a series of individual permits. This simplifies the air permitting process.

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Robert Koster, Environmental Engineer
4601 N. Monroe St., Spokane, WA 99205

To request ADA accommodation, contact Ecology's ADA Coordinator by email at ecyadacoordinator@ecy.wa.gov, or call 360-407-6831, 711 (relay service), or 877-833-6341 (TTY). More about our accessibility services.