Transcription of Bench Mark Reset Procedures
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Bench Mark Reset Procedures
Guidelines to preserve elevation data for a soon-to-be disturbed or soon-to-be destroyed Bench markDocumented by Curtis L. SmithNational Geodetic SurveySilver Spring MD 20910 September 2010 Bench Mark Reset ProceduresUnited States Department Of CommerceNational Oceanic and Atmospheric AdministrationNational Ocean ServiceNATIONAL GEODETIC SURVEYG uidelinesBench Mark Reset Procedures1 NATIONAL GEODETIC SURVEYR elocating Vertical Control Bench Marks ..2 Setting a New Bench Mark ..2 Single Mark Level Tie (3rd Order) ..3 Observing Sequence for Optical Leveling Equipment..4 Observing Sequence for Digital Leveling Equipment ..6 When Reference Points Are Required..8 Destroyed Bench Marks.
and Procedures to Incorporate Electronic Digital/Bar-Code Leveling Systems” for 3rd and higher order accuracy leveling procedures and equipment requirements. Record rod readings, at a minimum, to millimeters, or thou-sandths of feet. The model and type of instrument and rods used (e.g., fiberglass, aluminum, single piece, etc.), as well
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