A benchmark is defined as a permanent physical mark of a known elevation point in the field. It is a surveyed marker which provides a point of beginning for determining elevations of other points in a survey.
An interactive map of the City Benchmarks, including pictures showing exact locations, can be found here on our GIS. Once you load the GIS viewer, you will need to turn on the Benchmark layer by clicking on the checkbox next to it.
Please contact the Public Works Department at (408) 866-2150 if you have any further questions.