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Major Projects
        
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        StatusAwardedOn GoingPlannedCompleted
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        LocationBartholdi Fountain and GardensBotanic Garden Administrative BuildingBrumidi CorridorsCannon House Office BuildingCapitol DomeCapitol Power PlantCapitol Reflecting PoolCapitol RotundaCapitol Subway SystemCox CorridorsCryptDirksen Senate Office BuildingFord House Office BuildingFort MeadeHall of ColumnsHart Senate Office BuildingHouse ChamberJames Madison Memorial BuildingJohn Adams BuildingLongworth House Office BuildingNational Statuary HallO'Neill House Office BuildingOld Senate ChamberOld Supreme Court ChamberOlmsted TerraceOutdoor GardensPackard CampusRayburn House Office BuildingRussell Senate Office BuildingSenate ChamberSmall House RotundaSmall Senate RotundaSummerhouseSupreme Court BuildingThomas Jefferson BuildingThurgood Marshall Federal Judiciary BuildingU.S. Botanic Garden ConservatoryU.S. Botanic Garden Production FacilityU.S. Capitol BuildingU.S. Capitol GroundsU.S. Capitol Visitor Center
      On Going
Construction work continues in the Cannon Building's west wing.

  Cannon Renewal

House Office Buildings

The Cannon House Office Building's renewal is an example of the Architect of the Capitol's commitment to preserving our nation's history.
    On Going
Building interior.

  Capitol Building Paint Analysis and Plaster Repairs

Capitol Building

Restoring areas of the U.S. Capitol to represent an appropriate period as determined by the curatorial community.
    On Going
South Olmsted terrace restoration in 2015.

  Olmsted Terrace Preservation

Capitol Building

To properly restore the Olmsted Terrace, a six-phased project is underway by the Architect of the Capitol (AOC) to repair the masonry at the terrace walls.
    On Going
Scaffolding on a building.

  Capitol Exterior Preservation - Stone and Metal

Capitol Building

A multi-phased project designed to address deferred maintenance, extend the life expectancy of the deteriorated stone and to replace missing elements of the U.S. Capitol Building.
    On Going
Detailed view of stone sculpture.

  Stone Preservation on the Capitol Campus

Stone preservation is a top priority for the Architect of the Capitol (AOC) as nearly every building is enveloped in stone and all have problems.
    On Going
View of the Summerhouse at the U.S. Capitol with the gates closed.

  Summerhouse Maintenance

Capitol Grounds and Arboretum

The Architect of the Capitol's repair and renovation of the Summerhouse fountain and surrounding landscape is complete. Additional landscape improvements to the grotto and surrounding planting beds will continue into the spring of 2024.
    On Going
The U.S. Capitol Dome at night.

  Deferred Maintenance

When the Architect of the Capitol (AOC) does not receive enough funding to pay for all maintenance and repairs required across the U.S. Capitol campus, work gets deferred due to budget constraints.
    On Going
Sculpture.

  Heritage Asset Conservation

The preservation of heritage assets on the U.S. Capitol campus is one of the Architect of the Capitol's (AOC) core functions.
    On Going
Exterior of a building.

  Thurgood Marshall Façade Repair

Supreme Court Building and Grounds

Work to stabilize façade elements at the Thurgood Marshall Federal Judiciary Building has begun.
    On Going
Sky and exterior of a building.

  Adams Building Roof Replacement and Fall Protection

Library Buildings and Grounds

This two-phase project will replace the 85-year-old copper roof of the Library of Congress' John Adams Building.
    Completed
Smokestacks, flowers, fountain.

  Cogeneration at the Capitol Power Plant

Capitol Power Plant

The Architect of the Capitol (AOC) completed a Long Term Strategic Energy Plan for the Capitol Power Plant (CPP), which identified cogeneration as the preferred solution for achieving energy savings, reducing environmental impacts, and maintaining a reliable source of chilled water and steam for Congress and the Supreme Court.
    Completed
Exterior view of a building.

  Supreme Court Façade Restoration - West

Supreme Court Building and Grounds

The Supreme Court Building's west front façade has undergone a complete restoration to address deterioration due to age, weather and nature.
    Completed
Placement of elements of scaffold that will reach, and eventually cover, the entire Capitol Dome enabling restoration work on Dome.

  Dome Restoration Project

Capitol Building

The Architect of the Capitol recently completed a multi-year project to completely restore the Dome for the first time since 1959-1960.
    Completed
Hands working on a painting.

  Brumidi Corridors Restoration

Capitol Building

In 2017 the Architect of the Capitol completed a long-term conservation effort to restore the murals of the Brumidi Corridors on the first floor of the U.S. Capitol's Senate wing.
    Completed
Exterior view of a building and a person.

  Hart Building Roof and Skylight Replacement

Senate Office Buildings

As part of this project, completed in 2015, the AOC also installed a 148 kW photovoltaic system on the Hart Senate Office Building roof. The solar panels will decrease utility use, increase sustainability and make the building eligible for an energy credit program which will further reduce electrical costs.
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