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Big Walker Tunnel - Rehabilitation

Rehabilitation design services
Estimated cost: Commencement:
February 22, 2001
Completion date:
October 17, 2001
Richmond, VA
United States
Technical data:

2 two-lane highway tunnels constructed in 1971. Length: 4229 ft (1289 m) each; cross section: 907 sqft (84 m²). Design of remedial waterproofing and diversion system installed in air ducts and on vertical walls. Project focused on minimizing vehicular flow disruptions and lane closures.

Geology description:

Brown Shale

Geology types:
Bid cost: Final cost:
Service areas:
Big Walker Tunnel Portal
East River Mountain Tunnel Portal
Damaged Tunnel Lining
Water Ingress Damage to Tunnel Lining
Concrete Corrosion at Side Air Conduits and Tunnel Sidewall Drains
Rehabilitation Cross Section
Detail of Waterproofing System
East River Mountain Tunnel
Tunnel Portal
Water Ingress in Air Duct