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 20910September 2010Bench Mark Reset ProceduresUnited States Department Of CommerceNational Oceanic and Atmospheric AdministrationNational Ocean ServiceNATIONAL GEODETIC SURVEYGuidelinesBench Mark Reset Procedures1NATIONAL GEODETIC SURVEYRelocating Vertical Control Bench Marks ........................................ .2Setting a New Bench Mark ........................................ ...........2Single Mark Level Tie (3rd Order) ........................................ .......3Observing Sequence for Optical Leveling Equipment.
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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