This twin bridge project was part of the Regina West Bypass plan. The bridges were built over the CP Rail’s main east/west Canadian twin rail line. They consist of two 80 m long bridges with two center piers/crash walls, five 1.3m deep steel plate girders per bridge, 225 mm poured in place concrete deck, poured in place concrete barriers and abutments, and poured in place 100 mm concrete slope protection.
The embankment was excavated to create a working platform from which we installed 240 – 2.4 m x 7.5 m rock columns. Coordination with CP Rail was continuous throughout the project. On average, a train passes every half hour, and CPR had specific requirements when working beside/over rail lines; required clearances and an on-site flag person were two of these requirements. Westridge developed methods and procedures that were approved by CPR to safely work by the rail lines. These procedures reduced the amount of times that work was required to stop and amount of time that CPR needed a flagman present. This efficient measure was conducted by erecting fences along the rail lines so that workers knew the boundaries of their work area. CPR train engineers knew that there was no danger when workers and equipment were within these fenced areas. Westridge also developed a method to increase productivity, create better safety for the workers, and reduce the amount of time CPR required a flag person. Westridge did this by installing a decking system on the bottom flange of the girders for workers to work from. Once installed, it eliminated the need for workers to tie-off when installing deck forms, eliminated the risk of tools and materials falling onto the rail lines, and eliminated the need for CPR flag person to be present. Therefore, our production was much more efficient than it would have been without these procedures in place, and the procedures also helped to establish a safer work environment. This method was proved to be incredibly efficient, and we implemented it over the entire bridge. To further increase productivity, a rail crossing was installed to facilitate movement of the equipment and material to each side of the tracks, as the site was 0.5 km from the nearest road. Protocols for use of this crossing were in conjunction with CPR.
Ministry of Highways and Infrastructure