Industrial mineral site no. 647, known as "Humptulips" is a site in Grays Harbor County, Washington. This site has been associated with limestone and marble. A notation found in DGER Bulletin 37 on page 55 says "On NW. side of Humptulips River is a rounded hill of noncrystalline limestone 50 ft. high, 100 ft. wide, and 150 ft. long; also a bed 110 ft. thick across the river to the SE", and designates the value as "Probably similar in quality and quantity to the Bear River deposit (no. 64)".