Design/Build Upgrade South Grounds Infrastructure

The project is a design-build construction project to install subsurface empty conduit duct banks and associated appurtenances on the south grounds of the White House. The White House grounds are a National Historic Landmark and a cultural landscape of significance within the city of Washington, D.C. This project will provide new and additional conduit duct bank capacity and increased conduit reach in order to provide for current and future needs related to miscellaneous and varied security, camera and lighting systems. The general duct bank arrangement is expected to consist of main "backbone" duct banks with many smaller duct bank "branches" to feed existing or future structures, systems and/or devices located across the south grounds of the complex. The estimated total linear footage of duct bank is expected to be in the approximate range of 5,000 to 15,000 linear feet, with each duct bank containing from one to approximately twelve individual conduits and with the size of each conduit ranging from one to approximately four inches in diameter. The project includes subsurface utility locating and professional engineering design and construction of trenching and/or directional drilling for subsurface conduit installation, excavation and backfill for installation of utility structures and associated appurtenances, and landscape restoration and sod installation. Of primary importance under this project is the protection of the historic landscape including many contributing features such as mature trees, sod and other landscape and hardscape elements.

Division 31 -	Earthwork, Erosion and Sedimentation Controls.
Division 33 -	Utilities, Storm Drainage Utilities.