Industrial mineral site no. 1288, known as "Silver Ridge (A)" is a site in Chelan County, Washington. This site has been associated with pumice. A notation found in DGER Bulletin 37 on page 86 says "Drill hole shows a 35-in. upper bed of pumice and a 24-in. lower bed separated by 12 in. of sand and covered by 12 in. of overburden", and designates the value as "Warrants investigation".
