Control Surveys for Major Bridges

by Normand L. Moore, (M.ASCE), Survey and Right-of-Way Engr.; California Div. of Bay Toll Crossings, San Francisco, CA,
Richard G. Begell, Asst. Surveys Engr.; California Div. of Bay Toll Crossings, San Francisco, CA,


Serial Information: Journal of the Surveying and Mapping Division, 1971, Vol. 97, Issue 1, Pg. 83-96


Document Type: Journal Paper

Abstract: Some old methods of surveying are combined with new ones to provide fast an very accurate survey control on major long-span bridges. The oldest type instrument, a mariner's navigation sextant, was used along with the more modern high accuracy devices. These instruments include optical theodolites, electronic distance measuring equipment, engineering lasers, computers, precise levels, depth recorders, two-way portable radios, and other related surveying equipment. The proper use of these instruments will provide the highest caliber survey control from initial planning to preliminary surveys, photogrammetric mapping, triangulation, hydrographic surveys, foundation explorations, property surveys, and primary survey control for construction. This paper covers the surveying procedures used for the planning and construction of the San Diego-Coronado Bay Bridge in California and the preliminary survey work being done for a proposed Southern Crossing of San Francisco Bay.

Subject Headings: Control surveys | Hydrographic surveys | Surveying instruments | Bridges | Infrastructure construction | Electronic equipment | North America | California | United States

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