• Expert Services
  • Railroad / Transit Tunnels
  • Tunnel Rehabilitation
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WMATA Tunnel Waterproofing Design

Washington Metropolitan Area Transit Authority (WMATA)

Portions of the underground segments of the WMATA metro system have experienced increased water infiltration, particularly in older segments of the system where systematic waterproofing was not included in the original construction. To address the issues in an engineered manner, WMATA has directed its GEC (GFP) to conduct thorough inspection and documentation of the conditions of shafts and tunnel liners at critical locations across the Metro system.

GEC On-Site Inspection Support Services:

Gall Zeidler Consultants (GZ), as part of the GEC team, provided engineering support, including developing design drawings, specifications and other supporting documentation necessary for WMATA to bid the work to contractors. Additionally, GZ was part of the field inspections and documentation of the condition of tunnels and shafts, necessary for development of the design documents. These inspections also included digital and thermographic scanning of the tunnels.

Location:

Washington, D.C.

Date:

2018 – Present

Structure:

Twin-running tunnels

Length:

111,026 feet

Cross-Section:

Varies

Geology:

Varies

Client:

Gannett Fleming – Parsons Transportation Group JV (GFP)

Owner:

Washington Metropolitan Area Transit Authority (WMATA)