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Registration Required

Webinar: Mount Diablo Survey Markers

Wednesday, September 27, 2023

Photo courtesy of Wikipedia

7:00 PM

Location: This presentation is online via Zoom.

The history of property mapping in California after it became a state in 1850 begins at the summit of Mount Diablo. The mountain’s prominence on the landscape made the summit the perfect location for early land surveyors to mark the starting point for a grid of lines that would be used to define property boundaries throughout most of northern California and all of Nevada. Surveying expert John Pettley will discuss the history and significance of the survey marks on top of Mount Diablo which are still in use by land surveyors today.

Register in advance for this webinar:

After registering, you will receive a confirmation email containing information about joining the webinar.

Fee: None

Leader(s): John Pettley

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