​Design-Build Projects

US 90 (Future I-49) LA 318 Interchange
State Project No. H.004932
St. Mary Parish

Status:
Project has been constructed and is open to traffic.

Description:
This project is a corridor improvement to US 90, LA 318, and associated frontage roads in St. Mary Parish.  The Project consists of the reconstruction of the mainline of US 90 (Future I-49), reconstruction of LA 318, and providing a frontage road system.  The Project includes a new grade separated interchange at the existing LA 318 intersection.  The Project limits along US 90 extend approximately 6,000 feet northwest to approximately 3,000 feet southeast of the existing LA 318 intersection.  The length of reconstruction of LA 318 is approximately 2,000 feet southwest and approximately 2,700 feet northeast of US 90.  The Project includes the following:

    • Reconstruction of a portion of US 90 in St. Mary Parish, with a four-lane controlled access facility that meets Interstate standards (F-3 roadway classification);
    • Reconstruction and widening of LA 318 to a two-way, two-lane roadway with median and shoulders (RC-3 roadway classification);
    • A system of frontage roads (RC-2 roadway classification) that provides connectivity to highways, ramps, businesses, and residences within the Project limits;
    • Minimal lowering of the existing Level of Service on all existing roadways in the Project vicinity during the Project duration;
    • Project and public safety, including emergency operations;
    • Relief and improvements for localized drainage issues;
    • Consideration of existing (as well as permitted, but not constructed) utilities during design and construction to avoid and/or minimize utility conflicts.  The Project also includes utility coordination and relocation, as required; and
    • Acquisition of all necessary Right-of-Way (ROW), as determined by final design.

Documents:

US 90 (Future I-49) LA 318 InterchangeNotice of Intent
US 90 (Future I-49) LA 318 InterchangeProcurement Schedule

RFQ

US 90 (Future I-49) LA 318 InterchangeLA 318 RFQ (final).pdf
US 90 (Future I-49) LA 318 InterchangeLA 318 RFQ App A - Project Description (final).pdf
US 90 (Future I-49) LA 318 InterchangeLA 318 RFQ App B - Format and Org for SOQ (final).pdf
US 90 (Future I-49) LA 318 InterchangeLA 318 RFQ App C - Forms, Acknowledgment of Receipt (final).pdf
US 90 (Future I-49) LA 318 InterchangeLA 318 RFQ App C - Forms, Cover and TOC (final).pdf
US 90 (Future I-49) LA 318 InterchangeLA 318 RFQ App C - Forms, Form E-1 - Past Project Descriptions (final).pdf
US 90 (Future I-49) LA 318 InterchangeLA 318 RFQ App C - Forms, Form E-2 - Sub Info (final).pdf
US 90 (Future I-49) LA 318 InterchangeLA 318 RFQ App C - Forms, Form L-1 - Proposer Org Info (final).pdf
US 90 (Future I-49) LA 318 InterchangeLA 318 RFQ App C - Forms, Form L-2 - Principal Participant Cert (final).pdf
US 90 (Future I-49) LA 318 InterchangeLA 318 RFQ App C - Forms, Form PP - Past Performance (final).pdf
US 90 (Future I-49) LA 318 InterchangeLA 318 RFQ App C - Forms, Form Q - Questions (final).pdf
US 90 (Future I-49) LA 318 InterchangeLA 318 RFQ App C - Forms, Form S - Safety Questionnaire (final).pdf
US 90 (Future I-49) LA 318 InterchangeLA 318 RFQ Master ToC (final).pdf

US 90 (Future I-49) LA 318 InterchangeShort List

RFP

US 90 (Future I-49) LA 318 InterchangeAddendum 1.pdf
US 90 (Future I-49) LA 318 InterchangeAddendum 2.pdf
US 90 (Future I-49) LA 318 InterchangeAddendum 3.pdf
US 90 (Future I-49) LA 318 InterchangeAddendum 4.pdf
US 90 (Future I-49) LA 318 InterchangeFinal ITP (12-19-14).pdf
US 90 (Future I-49) LA 318 InterchangeFinal ITP Appendix C - Cover and Index (12-19-14).pdf
US 90 (Future I-49) LA 318 InterchangeFinal Part 1 DB Agreement (12-19-14).pdf
US 90 (Future I-49) LA 318 InterchangeFinal Part 2 - DB Sections 100s (12-19-14).pdf
US 90 (Future I-49) LA 318 InterchangeFinal Part 5 - Engineering Data.pdf
US 90 (Future I-49) LA 318 InterchangeFinal RFP Master ToC (2-13-15).pdf
US 90 (Future I-49) LA 318 InterchangeITP Appendix C Forms.pdf
US 90 (Future I-49) LA 318 InterchangeOther RFP Revs (as of 12-19-14).pdf
US 90 (Future I-49) LA 318 InterchangePart 3 - Final Design Requirements and Performance Specifications 12-19-14.pdf
US 90 (Future I-49) LA 318 InterchangePart 4 - Request for Proposal Plans.pdf

US 90 (Future I-49) LA 318 InterchangeAdjusted Scores

Project Update:
This design build project was awarded for $56.7 million in June 2015. Currently working on design and acquisition services.  Site construction work should begin before the end of the year.  This project includes construction of a grade separated interchange allowing US 90 to cross over LA 318 and realignment of the frontage roads.  Entrance and exit ramps will be constructed as well.​