The South San Francisco Bay Height Modernization Project is a combined horizontal and vertical control survey carried out by the CSRC as a 2-centimeter Height Modernization project, and was submitted to NGS for blue-booking in the late autumn of 2003. The horizontal accuracy of this network is Order B. The private contractor for both the GPS and leveling portions of this network was Johnson-Frank and Associates.

The South San Francisco Bay control network is located on both sides of the southern San Francisco Bay, California, extending from the Pacific Coast on the west to Mount Hamilton the east, and from Angel Island on the north to the southern limits of the City of San Jose on the south. The area of the network comprises about 1700 square miles.

This project is the culmination of a process begun in 1996. In 1996 NGS, in cooperation with several other agencies, including the Bay Conservation and Development Commission, the California Coastal Commission and the California State Lands Commission, performed the first demonstration project for Height Modernization. The project encompassed the central portion of the San Francisco Bay bounded by San Leandro to Berkeley on the east and Daly City to San Rafael on the west. Over the next several years the project was extended through the north Bay, San Pablo and Suisun Bays, and throughout the San Joaquin/Sacramento River Delta area. This CSRC project completes the Height Modernization efforts for the overall Bay/Delta area.

Contributed by: Mike Potterfield