Delivering Accuracy at Every Stage of Construction

With project specifications requiring construction tolerances of less than four-hundredths of a foot, establishing highly accurate survey control was critical. McAdams developed site control and a three-dimensional machine control grading model to support construction activities and provide reliable layout in the field.

As construction progressed, our geomatics team performed detailed as-built surveys to verify that improvements met the required horizontal and vertical tolerances. The team collected data across a 20-foot-by-20-foot grid at key stages, including the prepared lime-treated subgrade, top of stone and each concrete pavement lift. This information was used to confirm material thicknesses and final design elevations before signed and sealed as-built surveys were submitted to the design team for final review and approval.

Project Features

• Site Survey Control
• 3D Machine Control Grading Model
• Construction Layout
• As-Built Surveys
• 20-Ft-by-20-Ft Grid Verification
• Horizontal + Vertical Coordinate Verification
• Subgrade + Pavement Elevation Verification
• Signed + Sealed Survey Deliverables
• Airport Apron Reconstruction

Photo Credit: Courtesy of The News & Observer