Construction Contract to Perform R -Tunnel Repair Work - AOC Step 2

The offeror shall perform R -Tunnel construction at the intersection of 2nd and Constitution Avenue NE including temporarily support existing structures, utilities, and adjacent structures to provide a new tunnel expansion and structural steel liner to the R-Tunnel section. This repair project includes coordination with various entities and Authorities Having Jurisdiction (AHJ) to perform construction work to extend the service life of this utility tunnel section servicing the Senate Office Buildings. The offeror shall complete structural repairs and perform tunnel improvements to provide a long term repair to the concrete envelope and extend the service life of R-Tunnel. The offeror shall furnish all labor, materials, supplies, equipment, facilities, disposal units, software, transportation, management, quality control, full-time independent safety, and incidentals to perform structural repairs and tunnel improvements to provide a long term repair to the R-Tunnel section at the 2nd Street, NE and Constitution Avenue, NE intersection of Washington, DC. The restoration and improvements process includes, at a minimum, the following: 1. Coordination with several Authorities Having Jurisdiction, including the Senate, Supreme Court, U.S. Capitol Police, National Park Service, Thurgood Marshall Federal Judiciary Building, and Union Station. 2. Underground survey and relocations of the existing utilities within R tunnel followed by open excavation / at grade construction activities. 3. Survey of adjacent historic items, including stained glass; sidelights; and an unsupported chimney at the Belmont-Paul Women’s Equality National Monument to determine the level of protection from construction activities. 4. Temporary support of existing tunnel structures, interior, and exterior utilities. 5. Providing a new concrete expansion to the tunnel. 6. Providing a new structural steel liner within the tunnel section. 7. Rerouting of the chilled water line and HPS condensate lines via the new tunnel expansion. 8. Restoring all tunnel and landscape, exterior utilities. 9. Coordinate work with other projects, contractors and entities performing work at the same time in the vicinity of this project (inside and outside of the tunnel work area

Division 02 -	Existing Conditions, Subsurface Investigation.
Division 31 -	Earthwork, Site Clearing, Grading, Excavation and Fill, Subgrade Preparation, Excavation, Shoring, Tunneling and Mining, Tunnel Excavation.
Division 35 -	Waterway and Marine Construction, Dam Construction and Equipment.