Open connected bucketline "Risdon" type dredge operated at Warm Springs near Idaho City, Idaho August 1899. The steam powered dredge was one of the first dredges operated successfully in the Boise Basin.
Map indicates claim ownership. Shows roads, proposed wagon road, ranches, mountains lakes, rivers and creeks. Includes legend showing principle properties. "Locations filed for record included in this territory number 6000 to date." Scale. 1...