Location: Air Force Base, N.C.
Client: U.S. Army Corps of Engineers, Savannah District
Services: Civil, structural, hydrologic and hydraulic, environmental, and electrical engineering and construction inspection
Under this agreement, KCI was responsible for all planning and design of roadway/civil facilities in support of the proposed $12 million munitions storage complex at an Air Force Base. Based on a special request by the Savannah District Corps of Engineers, KCI completed the design on an accelerated schedule. Design services included in the project were as follows:
Roadway Design. KCI was responsible for the layout and geometric design of approximately two miles of access road to the munitions facility on new alignment. The design included upgrading an existing intersection to meet the capacity of the new access road and providing a vehicle inspection area with overhead lighting and telephone service. During the preliminary layout stage of the roadway design, KCI worked closely with the Savannah District Corps of Engineers to establish an alignment that would both reduce the construction cost and avoid impacting sensitive ecological preservation areas and wetlands. Pavement marking, traffic control, and signing were also included in the design.
Structural Design. Design of a 200-foot long, three-span bridge crossing the Little River was required for this project. The design included a continuous steel beam superstructure and drilled shaft construction for the interior bents. The bridge configuration provided for a long center span over the Little River to avoid placing bents into the river channel.
Hydrology and Hydraulics. The hydraulic study involved the analysis of the Little River drainage basin, McPherson Creek, and Cypress Creek as the major crossings. HEC-2 analyses of the existing and proposed conditions at the Little River crossing were made to determine the effect of the bridge on flood flows and scour conditions. Corrugated metal pipe-arch culverts were designed to handle the smaller creek crossings and allowed for cost savings over conventional box culverts. Various cross-pipes were also designed with special consideration given to minimizing the impact on surrounding wetlands.
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