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This map indicates the locations of some of the more highly visible projects under way within the Capitol Complex. It is provided to succinctly inform members of the public about work they may witness and want to know more about. There are literally hundreds of projects under way at any given time, but most are not particularly visible or disruptive. This is a clickable image map. The lettered arrows are links to project information summaries that appear below the map.
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Project Information Summaries | Map Key | Project Information |  | Capitol Visitor Center (CVC) | Location | | East Plaza and east grounds of Capitol; north lawn of Capitol; area adjacent to New Jersey Avenue NW across Constitution Avenue from Capitol's North Extension; temporary visitor screening center on south side of Capitol; related utility work on Capitol Square. | | Description | | Three-story underground construction project under East Plaza and grounds of Capitol with vehicle access tunnel underneath Constitution Avenue; improvement of East Plaza and completion of Capitol Square Perimeter Security Project to coincide with completion of CVC project. (See the Capitol Visitor Center overview pagefor additional information.) | Status &
Time Line | | Preconstruction activity began fall 2001; major construction activity began summer 2002; completed and opened on December 2, 2008. | | | | |  | Perimeter Improvement Projects | Location | | Capitol Square, Senate Office Buildings, House Office Buildings, Library of Congress Buildings. | | Description | | Replace unaesthetic temporary security features with architecturally appropriate permanent fixtures, including steel bollards, stone and concrete planters, security kiosks, hydraulic vehicular barriers, and lift gates. | Status &
Time Line | | Construction began spring 2001; completion will coincided with completion of Capitol Visitor Center Project in 2008. | | | | |  | U.S. Supreme Court Modernization Project | Location | | First Street, N.E. between East Capitol Street and Maryland Avenue | | Description | | In July 2003, the AOC embarked on a multi-year Supreme Court modernization project with two main goals—to replace virtually all of the original systems, including electrical, plumbing, and HVAC and to build an annex that will house building functions displaced by increased space requirements of mechanical systems. The renovation work on the Supreme Court Building is being completed in two phases. The first phase of the project included the construction of the two-story underground annex on the Maryland Avenue side of the building, which began in 2003. The second phase includes upgrading and replacing the building systems, in addition to interior work on the underground annex. This work began in spring 2004. The general contractor forecasts completion of the modernization project in fall 2010. | Status &
Time Line | | Phase I is complete. Phase II began in Summer 2004 with projected completion in 2010. | | Public Impacts | | Maryland Avenue is closed to pedestrians from the staircase near the northwest corner of the building continuing east to Second Street. Maryland Avenue is also closed to eastbound vehicular traffic. The sidewalk along East Capitol Street adjacent to the Court is closed to pedestrians. | |  | West Refrigeration Plant Expansion | Location | | U. S. Capitol Power Plant | | Description | | The expansion of the West Refrigeration Plant by 80,000 square feet will enable the Capitol Power Plant to reliably meet cooling requirements of the U.S. Capitol complex through 2025 and will significantly increase overall plant efficiency. The U.S. Capitol Power Plant supplies steam to heat and chilled water to cool 18 facilities in the Capitol complex including the House and Senate Office buildings, the Supreme Court, and the Library of Congress. | Status &
Time Line | | Construction began in Spring 2003; and was completed in the Fall of 2007. | | | | |  | Utility Work | Location | | Constitution Avenue, N.E., between First and Second Streets. | | Description | | A water-line relocation project is being done in conjunction with a Perimeter Security project that involves the installation of a pop-up vehicle barrier at the intersection of Constitution Avenue and Second Street, N.E. | Status &
Time Line | | Project Complete | | | | |
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