This Design-Build project includes 9.403 miles roadway reconstruction on US 1/SR 4 beginning south of SR 147 at Plant Hatch and extending south of George Hill Road with 238,425.00 SF of new bridges over the Altamaha River and four additional creeks. UIG self-performed all structures including the construction of five new bridges: — 4,080’ x 41-3” bridge over the Altamaha River with four bents on 72” drilled shafts up to 152’ deep, two bents on 14” x 102 H pile footings, eight bents on prestressed concrete pile footings, and 44 prestressed concrete pile bents. Spans consist of AASHTO MBT72, Type III, and Type II prestressed concrete beams. –600’ x 41’-3” bridge with six prestressed concrete pile bents and AASHTO Type II prestressed concrete beams. –380’ x 41’-3” bridge over Williams Creek with eight prestressed concrete pile bents and AASHTO Type I Mod and Type II prestressed concrete beams. –Two 360’x 41’-3” bridges over Cobb Creek each with five pipe pile bents AASHOT BT54 prestressed concrete beams. For the Altamaha River Bridge, UIG used their extensive fleet of sectional barges to install a 41’ wide causeway and fingers from the southern riverbank that provided uninhibited construction access during the moratoriums and fluctuating water elevations. Sectional barges were also used for floating crane platforms, drill rig platforms, and material storage platforms. This approach to construction access allowed 3 construction headings to work and proceed simultaneously with a continuous supply of material to facilitate completion within an aggressive schedule, while fully complying with all environmental permitting requirements. Awarded Contractor of the Year from GDOT and Project of the Year from GHCA in 2023.
Replacement of 4 bridges
Bridge 1 Altamaha River
Bridge 2 Altamaha Overflow
Bridge 3 Williams Creek
Bridge 4A&B Cobb Creek
