The C-Tram bridges provide automated transit system (ATS) service for passengers traveling between the main terminal and the C-Gates at McCarran International Airport. At the time of this project, the two elevated parallel bridge structures for the ATS were approximately 25 years old and started to show signs of wear and deterioration.

Sigma was contracted by the Clark County Department of Aviation to provide the design, specifications, cost estimates and construction support for the repair and rehabilitation of the C-Tram bridges.  The rehabilitation and repair strategy required at least one of the two bridges to remain open during the repairs due to their high usage. A staged construction approach allowed at least one C-Tram bridge to remain open at all times.

Sigma recommended the use of a high molecular weight methacrylate concrete sealer, new modular type expansion joints, and pre-design repair types to facilitate the rapid repair and rehabilitation of the existing structures.  The replacement of the guide rail bearing pads, deck sealing and the expansion joint repairs were included in this project.  The project was completed on time and under budget, just in time for the installation of new ATS passenger vehicles at the McCarran International Airport.