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Hydraulic mining
Site of the old road leading up to Simpson's Bridge
Men with surveying equipment stand near log dam
Men posed on log dam in river bed
Men standing near washed out wooden bridge in river
Hydraulic mining
Five men stand near log dam in dry river bed
Man stands at river's edge
Photographs of the effects of hydraulic mining in Nevada, Sutter, and Yuba counties
Map of California Pacific Railroad
General map of the Spring Valley Water Works
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