Industrial mineral site no. 302, known as "Tieton" is a site in Yakima County, Washington. This site has been associated with special clays-bentonite. A notation found in DGER Bulletin 37 on page 27 says "Derived from alteration of volcanics. Determination of thickness and extent is complicated by land slides", and designates the value as "Currently under production by Calco Industrial Minerals, Seattle".