Discusses geology and mining activities of Atlantic Cable, Van Winkle, and Shamrock Mines and hydrology of Silver Creek. Provides site evaluation, testing, and remediation in Rico, Dolores County. 15 pages. 9 figures. 1 table. 1 plate (1:240). Digital PDF download. OF-91-01D
This is a report on how flooding of residences in Rico, Colorado occurred after a section of a mine collapsed under a creek creating a whirlpool in the creek, and how dye testing was attempted to test the presumed source to distinguish from a piped potable water line with a defective valve, and ultimately how the problem was remediated. There is a sister report OF-91-02 discussing the dye study in more detail.