I-70 Twin Tunnels

Idaho Springs, Colorado

Tsiouvaras Simmons Holderness is providing a senior inspector for the $106 million Twin Tunnels project that adds one eastbound lane from the East Idaho Springs interchange to US 6. The project consists of expanding the eastbound tunnel and replacing the Clear Creek Bridge along with extensive retaining walls. As the lead Senior Inspector for the structural elements of the tunnel, TSH has provided training to the inspection staff for the inspection of reinforcement and cast-in-place concrete.

  • Services include inspection of both roadway and structural elements including earthwork, structural concrete, rebar, paving, guardrails, and traffic control
  • Provided training to the inspection staff for the inspection of reinforcement and cast-in-place concrete