Camden Street Drain Replacement

Baltimore, Maryland
Year Completed: 

Clark Water provided design-build services for CSX Transportation to construct new drainage infrastructure in the Howard Street Tunnel in downtown Baltimore, MD.

The objective of this project was to install a new pump station and gravity siphon system with a 60" storm drain approximately 10' below the existing track level and plug the existing 48" storm drain to alleviate flooding inside the Howard Street Tunnel.

The Clark team excavated shafts on the East (Transition Structure) and West (Pump Station/Diversion Structure) sides of the existing tunnel. The team then tunneled and installed three new storm drains from the Pump Station/Diversion Structure shaft.

  • 66” hand-mined tunnel with 48" carrier pipe from an existing manhole structure
  • 48” hand-mined tunnel with 18" carrier pipe from the new Howard Street Tunnel inlet structure
  • 73.5” MTBM tunnel with 60" carrier pipe from the Howard Street Transition Structure

The Pump Station/Diversion Structure Shaft takes storm water from the existing manhole structure and the new Howard Street Tunnel inlet structure, channels the flow under the tunnel to the Howard Street Transition Structure, and discharges it into the existing 48" storm drain.