The Society membership is committed to preserving the artifacts and records of land surveyors who have worked in and around or have been influenced by the Mount Diablo Meridian located in Contra Costa County in Northern California.
Three initial points, the Mount Diablo Base and Meridian (est. 1851) (center), the San Bernardino Base and Meridian (est. 1852) (bottom), and the Humboldt Base and Meridian (est. 1853) (top) are the starting points for the property grid covering California and Nevada.
Coming Soon.
The Mount Diablo Surveyors Historical Society (MDSHS) was created to enrich the general public by collecting, preserving and displaying the knowledge, technology and artifacts of the land surveying profession. The Society is a nonprofit public benefit tax-exempt corporation, and any donations of monies, grants or artifacts are fully tax deductible.
To become a member, please fill out this form and mail it back to us.
We currently have regular meetings on Zoom.