Dynotec served as a subconsultant to RS&H for civil engineering services under the Columbus Regional Airport Authority’s On-Call Airside Contract.

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The development included four new airport hangars, a taxiway extension, and associated drainage infrastructure, including a new dry detention pond. The project disturbed approximately 6.67 acres of land, increasing the impervious surface area from 0.10 acres pre-construction to 3.76 acres post-development.

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Dynotec’s design was guided by the geotechnical investigation report, which provided detailed soil and slope data for the site. The predominantly vacant area featured a large conveyance ditch along the north and west boundaries, which informed drainage planning. The preferred stormwater control practice (SCP) was a dry detention basin sized to accommodate the required detention volume. The basin provided 36,000 cubic feet of storage, exceeding the 100-year storm requirement of 35,720 cubic feet. An outlet control structure was incorporated to regulate discharge into the existing conveyance ditch to the north.

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Erosion and sediment control measures included inlet filters for stormwater catch basins, straw wattles surrounding the parking area, and requirements to minimize truck traffic impacts with prompt roadway cleaning and restoration. All stormwater controls were scheduled for routine inspections to maintain full functionality throughout construction and beyond. Non-sediment pollutant controls required all fueling operations to occur off-site, while dewatering activities, though not anticipated, would comply with City of Columbus and Ohio EPA regulations if needed.

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The Result: The project delivered resilient civil and stormwater infrastructure to support new aviation facilities and expanded airside operations. Dynotec’s design not only met regulatory standards but also enhanced site sustainability by effectively managing stormwater, protecting nearby conveyance systems, and minimizing construction-related environmental impacts.