Page 15 - July/Aug 2015 Vol. 33 No. 2
P. 15
phased construction approach would of-
fer—the ABC process would also result in
significant sustainable and environmental
benefits, including less disruption to the
creek and reduced carbon emissions, as
traffic gridlocks would be eliminated.

Building a New Bridge for residents of an adjacent subdivision. Completed bridge
After demolition was complete, the site over Otter Creek
Starting Friday, September 12 at 8 p.m., was cleared. Concrete from the former
TDOT closed Old Hickory Boulevard bridge was repurposed as fill material, Weathering steel beams, which don’t
from Chickering Road to Hillsboro Road while rebar was collected and recycled. require painting, as well as epoxy reinforc-
to allow crews to replace the existing ing steel that offers enhanced protection
bridge over Otter Creek. As part of the Just after 6 a.m. Saturday, the first in both freezing and thawing conditions
comprehensive project, GS&P was tasked superstructure unit—one of two that were used, providing a durable, low-main-
with developing a plan to utilize prefab- weighed approximately 225,000 pounds tenance and sustainable structure. A deck
ricated superstructure units that could be each—was lifted off the ground by three seal was also utilized to further protect the
constructed off-site, installed, and joined cranes. Once both units were set in place, bridge.
down the center during the weekend road the concrete bridge rail was poured. By
closure. The team also created plans for 10:30 a.m. the units were joined together Constructed with minimal disturbance
precast approach slabs and sub-footings using high-strength grout. to the creek, the new superstructure with a
to transition the bridge to the approach projected life span of 75 years was opened
roadway. to traffic by 8 p.m. Sunday, coming in 10
hours ahead of schedule.
Once the existing bridge and section of
roadway was closed and traffic detoured,
demolition was able to commence at 9
p.m. The only portion of the original
structure to remain were the abutments.
Prior to the closure, these surviving bridge
supports were widened allowing for the
addition of 6-foot shoulders on each side
of the overpass to improve site distance

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