Randles Sand and Gravel plans to quarry rock, gravel, sand and topsoil from 500 acres just north of Eatonville, WA.
It’s expected that the site would be worked for 40 years.
The Planning and Land Services Department is taking public comment until December 1.
On-site facilities for crushing gravel and topsoil composting would be part of the Randles operations outlined in a draft environmental impact statement the county.
Randles proposes moving material from the mining site via trucks and rail shipments.
The overall operation would be bigger than any other existing gravel mine in the county, said Adonais Clark, a senior planner for the county.
Others are run by Corliss near Sumner and Miles Sand and Gravel between Puyallup and Tacoma.
The quarry is the source of basalt rock for rockeries. The company trucks the material as far as Oregon and Idaho.
Randles, based in Frederickson, has been in business since 1969 as a suppier of sand, gravel and topsoil.