Mining In Washington | The Diggings™
20/12/2002 · The most commonly listed primary commodities in Washington mines are Gold, Silver, and Copper . At the time these mines were surveyed, 1,737 mines in Washington were observed to have ore mineralization in an outcrop, shallow pit, or isolated drill hole—known as an occurance mine. 1 Washington has 1,591 prospect mines. 2 1,625 mines were in ...