Monitor of Knickerbocker Flat
This monitor used by Louis Dondero Yankee Hill Mining and Gravel 1873 produced one million dollars in gold annually. Largest monitor in Southern Mines. Hydraulic mining was prohibited by legislature in 1906.
Dedicated October 28, 1967
Re-dedicated May 28, 1989. 5994
Matuca Chapter 1849 E Clampus Vitus
Credo Quia Absurdum
Marker is at the intersection of Yankee Hill Road and Sawmill Flat Road on Yankee Hill Road.
Courtesy hmdb.org