Several Prairie Engineers staff members were responsible for topographical surveys, ground control point establishment, and map accuracy check point surveys for approximately 5,000 acres at the former Savanna Army Depot. Primary control was established using static global national satellite system (GNSS) surveys and differential levels for elevation. Ground control points and map accuracy check points were established using Real Time Kinematic (RTK) GNSS surveys. Topographical surveys included the collection of drainage, structures, utilities, and top of rail profiles for approximately 161,000 feet of rail lines.
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