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Seven Bridges in 74 Days Ocracoke, North Carolina

Seven Bridges in 74 Days Ocracoke, North Carolina. Rapid Bridge Replacement. Project Location. Google Maps. Rapid Bridge Replacement. Google Maps. Ocracoke NC 12 Bridges. Ocracoke NC 12 Bridges. Existing. 7 bridges built in 1950's Timber structures w/ ACP Clear width 22.5 ft.

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Seven Bridges in 74 Days Ocracoke, North Carolina

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  1. Seven Bridges in 74 Days Ocracoke, North Carolina

  2. Rapid Bridge Replacement Project Location Google Maps

  3. Rapid Bridge Replacement Google Maps

  4. Ocracoke NC 12 Bridges

  5. Ocracoke NC 12 Bridges Existing • 7 bridges built in 1950's • Timber structures w/ ACP • Clear width 22.5 ft. • 36 to 152 ft. long • No approach guardrail

  6. Challenges Maintaining access for residents Minimize economic impacts Remote location Environmentally Sensitive Area

  7. Project Details • Replace seven bridges on NC 12 • January 1 to March 15 • Contractor incentive/disincentives • Detour

  8. 8 week bid advertisement Mandatory prebid meeting Awarded to Carolina Bridge Company; Orangeburg, SC for $8,024,399.81. Site Available Nov. 2007 Incentive/Disincentive $10,000/day. Bonus $250,000: open NC 12 on or before March 15th . Ocracoke NC 12 BridgesConstruction Highlights

  9. All prefabricated elements

  10. Alternate Concrete Barrier Rail Light Weight Concrete Barrier Cast on Cored Slab • Proposed by Carolina Bridge Co. • Barrier Cast on the Slab at Casting Yard.

  11. Assembly Line Construction

  12. Assembly Line Construction • 5 crews • - Drive pile (day) • Set prefabricated caps (day) • Set cored slab superstructure (day) • Clean up and setup for next day (night) • Practice fit up in yard

  13. Partial Removal of Structures

  14. Piles Driven Through Existing Bridge

  15. Innovative Concepts • NCDOT hired a full time towing contractor for detour • Contractor drove end bent piles ahead of closure • DOT and contractors crews stayed on the Ocracoke island • Food service brought by local restaurant

  16. Setting Cored Slabs - 14 tons

  17. Open Early To Traffic March 5, 2008 • All Structures Complete on February 16, 2008. • Carolina Bridge Awarded Incentive & Bonus: $350,000

  18. Rapid Bridge Construction

  19. Rapid Bridge Construction Reasons for Success Motivated DOT and Contractor Gave Contractor the ability to use innovation Community outreach Close proximity of Bridges (mobilize one time) NCDOT thought outside the box!

  20. January 2, 2008 Begin Beach Detour

  21. Questions?

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