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NW 25th Street Viaduct

Contract Type: Conventional Bid/ Design-Build

Contract Amount: $124 million

Location: Miami-Dade County, Florida

Client: FDOT District Six

JV Partner: New Millenium Design Consultants, Inc.

Completed: July 2011

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The project was completed 126 days ahead of schedule, achieved a final Contractor Past Performance Rating (CPPR) of 106, and received the 2012 FTBA Best in Construction Award (Major Bridge).
The project includes a one-mile viaduct over NW 25th Street, DERM drainage canal and four active rail lines. It is a major bridge project and includes twin 28-span viaduct structures and two ramp bridges. Design-Build specifications were implemented after the de Moya Group submitted a value added proposal to the Department to bring the project under the maximum bid price.

Project Features:

  • Work included 130 individual deck pours over the 67 bridge spans.
  • Complex bridge construction with a combination of concrete pier caps and structural steel straddle caps with weights up to 400,000 lbs.
  • Complex construction sequences to minimize impacts to traffic on NW 25th Street and railroad operations while building the massive structure overhead.
  • Construction activities included MSE walls, straddle bents, piles and pile cap foundations, an anchored bulkhead wall, and 14-foot diameter culverts.
  • The de Moya Group provided a proactive management team that resolved all constructability issues prior to affecting the project schedule.
  • Required a total of 139 mass concrete pours.
  • Existing utilities were avoided while building pile foundations, underground drainage system, water mains, force mains, and gravity sewer lines.
  • Construction of seven large diameter culverts (up to 14 foot in diameter).
  • The project received the 2011 ASCE Project of the Year Award (Miami-Dade County) and the 2012 FTBA Best in Construction Award (Major Bridge).
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