Industrial mineral site no. 1747, known as "Heidegger Hill Deposit" is a site in Stevens County, Washington. This site has been associated with limestone and marble. A notation found in DGER Bulletin 48 on page 149-150 says "The limestone of Heidegger Hill is the largest single body of limestone in the greenstone-limestone unit mapped by Cole. The carbonate rock is a light-gray to gray, fine to medium-grained, massive limestone", and designates the value as "In spite of the obviously impure nature of the limestone, 6 samples were taken as checks on the quality of this extensive limestone outcrop. The average (unweighted) content of CaO is 49.54".