Twin Tunnels, Idaho Springs, COLORADO
Video of Idaho Springs Tunnel Blast
Curved Steel Plate Girder Bridge
The Twin Tunnels CMGC project is a two phase widening of the East bound and West bound tunnels at Idaho Springs, Colorado. Each tunnel widening will almost double the width of each of the tunnels. The bridge designed on the project is a 3 span prestressed concrete bridge intended to replace half of the existing structure currently in service. The bridge is 302'-8" long with a maximum span length of 159'-2".
Project cost: $110 Million
Client: Edward Kraemer & Sons, Inc/Obayashi JV
Design of falsework and temporary structures for the Clear Creek Bridge.
Design of EB & WB Tunnel portal blast protection frame.
Retrofit of portal frame for Tunnel rebar hoisting.
Design of rock fall wall & fencing.
Design of access bridge.
Evaluation of heavy equipment and crane loads on existing bridge.
Development of erection manual.
Design of rigging and lifting equipment.
Demolition plan development.
Mass concrete plan development.
Integrated working drawings.