Malkoff Diggins State Historic Park
A mining marvel in every respect, Malkoff Diggins Mining and Gravel Company dug deep into Calafornias Gold Rush Story.
One the most impressive feats–a drainage tunnel to reach the South Yuba River. The tunnel was carved from solid bedrock and was 8000 feet long and nine feet in diameter lying 200 feet below surface. Today a 557-foot section is open to foot traffic.
The dig, itself, is a nice hiking ground. It hosts a unique ecological fingerprint and the revealed sedimentary layers are awe inspiring.
Park brochures bursting with interesting tidbits are availble online.