Water jet mining #9 mine. NWI nozzle produced 1500 lbs. of pressure. Roslyn, Washington.
"Northwestern improvement Company (NWI) #9 Mine at Roslyn, Washington" (2014). Suncadia Photographs. 18.
Educational use only; no other permissions given. Copyright to this resource is held by the content creator, author, artist or other entity, and is provided here for educational purposes only. It may not be reproduced or distributed in any format without written permission of the copyright owner.
Suncadia Legacy, Central Washington University Archives and Special Collections