DESIGN-BUILD
Length: two equal spans of 124 ft (38m) for a total of 248 ft (76 m)
Width: 29.7 ft (9 m)
Depth: 5.38 ft (1.6 m)
The DCR bridge, which consisted of a steel bridge and had been open since 1958, crossed Route 24 and linked the popular “Blue Hills Reservation” recreation area to the nearby city of Randolph. The bridge was functionally obsolete due to inadequate clearance and was increasingly costly and difficult to maintain.
SYSTRA IBT and their partners were tasked with the design of the new bridge with the objectives of increasing the available clearance, reducing the maintenance cost, and minimizing the impact of construction without changing the approach grade on
either side.
The unique design consisted of precast concrete segments with a channel section, which increased the vertical clearance over Route 24 by more than 2 ft (0.6 m) without requiring any additional abutment fill. The erection of the superstructure took only two weeks, minimizing traffic disruption.
Awards:
- 2011 ASBI – Bridge Award of Excellence
- 2011 PCI – Best Non-highway Bridges, Engineering Design Award
Reseau Express Metropolitain (REM) – Greater Montréal, Canada
