1. Map showing water wells and springs in the Tungsten quadrangle, Boulder, Gilpin, and Jefferson Counties, Colorado [cartographic material] Yale Public content 1973. 2013-04-23T15:54:52Z. 2013-05-02T15:46:54Z. Gable, Dolores J., 1922-. U.S. Geological Survey. English. Public. Colorado, Boulder County, Gilpin County, and Jefferson County.