Benchmark Data

Street Name

Click here for CCSF VD13

SAN FRANCISCO CITY VERTICAL DATUM STATEMENT:
The City & County of San Francisco performed precise Leveling Surveys in 2013 and 2014. The purpose was to recover the North American Vertical Datum of 1988 (NAVD88) and establish a vertical control reference network known as the San Francisco Vertical Datum of 2013 (CCSF-VD13). See the Survey Report titled City & County of San Francisco 2013 Second Order Leveling Network Survey and the CCSF 2013 NAVD88 Vertical Datum dated February 28, 2014 on file with the City & County Surveyor. CCSF-VD13 supersedes the Old City Datum. The difference between this CCSF-VD13 and the old City Datum varies across the City. The conversion approved by the Bruce Storrs, PLS the City and County Surveyor to estimate the old City Datum follows: CCSF-VD13 (feet) - 11.35 feet = old City Datum in feet. The actual differences on old City Datum benchmarks are found to vary between 11.2' and 11.5' or greater due to subsidence and lack of maintenance and are not acceptable for converting to CCSF-VD13. Again, converting from old City Datum heights to CCSF-VD13 is not supported. The old City datum benchmarks are published here to preserve historical information.