Corbalis to Fox Mill 54″ Water Main

OWNER: Fairfax County Water Authority

ENGINEER: Whitman, Requardt & Associates, LLP

SOUTHLAND HOLDINGS TEAM: Southland Contracting Inc.


This project included furnishing and installation of approximately 12,000 LF of 54″ watermain by shafts and tunnel method.  Installation of associated valves and related appurtenances. Approximately 8,600 LF of 54-inch watermain was installed in tunnels with a Robbins 88-inch Double Shield TBM.  This project was awarded to us in 2012 after the original general contractor failed to perform.

We determined that prior to installing our designed TBM, the former GC’s Lovat 99-inch TBM had to be removed from the previously excavated portion of the tunnel.  Despite coming in on a project already in progress, we consider this project a success.