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.
Pioneers,O Pioneers! Old Oregon Trail Centennial Celebration, June 12-13-14 1930. The program lists events over three days including a parade, circus, air races, and a dance. A list of early Idaho Pioneers is part of the pamphlet.