Industrial mineral site no. 1495, known as "Lawson Lake" is a site in Okanogan County, Washington. This site has been associated with sodium sulfate. A notation found in DGER Bulletin 37 on page 96 says "Area of 20 acres. Brine contains 3,000 tons of sodium sulfate. Also, crystalline salts, averaging 5 ft. in thickness, contain 8,000 tons of sodium sulfate per foot of depth of crystal", and designates the value as "Tonnage alone too small for commercial operation".