G-004 Am-0001.pdf

This document is a Benchmark Details Notes sheet for a survey project, specifically page G-004 from what appears to be a construction or engineering document set. The benchmark details provide technical specifications for survey control and geodetic reference points, with a focus on vertical and horizontal datum referencing.

Key technical details include requirements for survey control monuments, horizontal and vertical accuracy standards, and guidelines for conducting surveys prior to construction. The document outlines precise procedures for establishing survey control points, including using National Geodetic Survey (NGS) control monuments, establishing horizontal and vertical control with specific accuracy requirements, and preparing survey data for design layout and construction purposes. The sheet provides technical instructions for surveyors and contractors on how to conduct pre-construction surveys, create surface representations, and prepare documentation using CAD and Excel files.