Survey and Topographic Mapping – Bolton Field – Columbus, Franklin County, Ohio
On behalf of the Columbus Regional Airport Authority (CRAA), RDM International (RDM) provided design services for Bolton Field Airport. As part of the design services, STONE provided topographic survey and base mapping services, as well as specification updates related to construction stormwater management in the Big Darby watershed.
STONE performed a Topographic Survey of the project area and provided a Base Map in AutoCAD. The topographic survey included any visible / exposed utilities, and the survey data was on the Ohio South State Plane Coordinate System and the NAVD 88 as established by GPS. Topographic mapping was provided in one-foot contours, and two benchmarks / reference points were established. The following was captured:
• 25′ x 25′ grid within survey area
• All structures and appurtenances that will impact paving operations (gutter, bollards, inlets, manholes (MH), poles, pin markers, etc.)
• Elevations including drainage swale and manhole
• Pavement markings, including T-Hangar exteriors
• Elevation of pavement at corners of T-Hangars and each column between door openings
The Project was located within the Big Darby Creek Watershed and was therefore subject to additional watershed requirements. RDM’s plan set included an Erosion Control Plan sheet, including silt fence and inlet control BMPs. STONE reviewed this sheet as part of the specifications and provided comments regarding details or notes for compliance with the Ohio EPA Construction General NPDES permit and Big Darby requirements.