The Malakoff Diggins State Historic Park Collection contains correspondence and financial material of the North Bloomfield
Gravel Mining Company, owner of the Malakoff Diggins Mine. The world's largest hydraulic mining operation, Malakoff Diggins
Mine was located near the town of North Bloomfield, California. This collection also includes the financial and administrative
records from North Bloomfield's Post Office and the McKillican and Mobley General Store. In addition, the collection contains
personal material belonging to North Bloomfield resident Mary Kallenberger. The records in this collection cover the years
1867 to 1959 with the bulk of the material ranging from 1871-1920.
The Malakoff Diggins Mine, located near North Bloomfield, California, was the world's largest hydraulic mining operation.
Small-scale hydraulic mining of gravel deposits near present day Malakoff Diggins began in 1853. By the 1860s miners discovered
that in order to profit from hydraulic mining, long-term investments were required. At this point many claims were consolidated
and stock companies were established to assemble the necessary capital. In 1866 a local miner consolidated multiple gravel
claims (including Malakoff Diggins) and with backing from San Francisco investors, established the North Bloomfield Gravel
Property rights reside with the California Department of Parks and Recreation. Literary rights
are retained by the creators of the records and their heirs. For permission to reproduce or publish,
please contact the California Department of Parks and Recreation.
Collection is open for research.