Tunnels and Shafts Water Leak Mitigation

Remediate defects in the concrete lining for B-Line Tunnels and the Shafts and Adits from Station 480+25 to Station 540+20, and A-Line Tunnels and the Shafts and Adits from Station 263+84 to 297+50 (both tracks/tunnels on each line) to address water infiltration with grouting methods shown on the drawings with materials and methods detailed in the specifications. The contractor shall select the appropriate method based on existing conditions to achieve a "dry" tunnel as defined on the drawings and in the specifications. In addition, other defects in the lining including cracks and spalls shall be remediated with the repair details shown on the drawings with materials and methods detailed in the specifications.

Dam/Tunnel, Renovation.

Division 02 -	Existing Conditions, Subsurface Investigation.
Division 03 -	Concrete, Cast-in-Place Concrete.
Division 31 -	Earthwork, Site Clearing, Grading, Excavation and Fill, Subgrade Preparation, Excavation, Erosion and Sedimentation Controls, Shoring, Tunneling and Mining, Tunnel Excavation.
Division 35 -	Waterway and Marine Construction, Shoreline Protection, Waterway Construction and Equipment, Dam Construction and Equipment.