First Street Tunnel Design-Build
Highlights
ACI
Excellence in Concrete Construction Award
Project information
The project involved constructing a 23-foot-diameter, 2,700-foot-long combined sewer overflow tunnel with four mining shafts, four diversion chambers and three adit tunnels that all connect the diversion chambers to the main tunnel. The underground structures temporarily store excess stormwater to relieve flooding during rain events.
Client:
District of Columbia Water and Sewer Authority
Service:
General Contractor
Market segment:
Water & Wastewater, Tunnels
Start date:
Completion date:
City:
Washington DC
State:
Washington D.C.
Country:
USA
Cost:
$154,650,310
Contact
Infrastructure
Meagan Smyth
Director, Business Development & Proposals - Northeast