September 23, 2016

FRENCH BRANCH PROJECT

The Louisiana Department of Transportation and Development (DOTD) contracted Barriere Construction Company, LLC to complete a $40 million road rehabilitation project to resurface almost 10 miles of interstate highway in eastern St. Tammany Parish, replacing worn faulted concrete pavement on Interstate 10 from the West Pearl River Bridge to the French Branch Bridge. This section of interstate had not received many substantive improvements since the 1960’s and presented complicated issues resulting from poor subbase and water intrusion.

From a safety perspective, one of the biggest and most important challenges involved the nature of the project itself: the convergence of three major heavily trafficked interstates (I-10, I-59 and I-12) and a volume of approximately 100,000 automobiles and trucks per day.

The French Branch project challenged Barriere and DOTD to construct a safer and more efficient highway by eliminating excessive roadway irregularities and wear and tear on vehicles. Barriere crews worked to replace the existing poorly conditioned subbase as well as reconstruct five corresponding off-ramps with the highest level of safety and without a single lane closure infraction.

In winning the project Barriere proposed a 360-day timeline, which was 315 days faster than other competitors’ proposals. Although additional work was added to the contracted scope, Barriere’s use of innovative tools such as drone surveying and intensive scheduling enabled Barriere to complete the project in just 307 days (71 days ahead of the adjusted timeline).

Over and above the initial scope of work, DOTD asked Barriere to add additional guardrail in places where the existing structures did not meet required specifications, due to inconsistent road leveling. Milling and asphalt leveling were also included to fix the substandard slopes on the project. Barriere completed other minor change orders including the adjustment of ITS boxes and the relocation of multiple signs. In total the client added $745,000 of work to the project, but the savings Barriere generated through Value Engineering and expert innovation more than covered the additional cost.

Client: Louisiana Department of Transportation and Development (DOTD)
Location: Slidell, LA
Start Date: May 14, 2015
End Date: April 21, 2016
Value: $39.8 million
Man Hours: 125,395

Awards:

  • Excellence in Construction (ABC Bayou)
  • Excellence in Construction (ABC Pelican)
  • CICE Construction Excellence Award (GNOBR)
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