Road Closure and Detour; LA 485: Site 4: Bridges Near Allen; H.001820
Friday, March 31, 2023 at 8:48:32 AM

Road Closure and Detour
Site 4: Bridge 1.9 miles east of its intersection with I-49
LA 485: Bridges Near Allen

Natchitoches Parish
S.P. H.001820
Control Section 115-02

The Louisiana Department of Transportation and Development (DOTD), advises the public that beginning Monday, April 10th, 2023 construction will begin on LA 485’s Site 4 Bridge in Natchitoches Parish and it will be closed to through traffic. This work will take place on LA 485: 1.9 miles east of the intersection of LA 485 and I-49.

The intent of this project is to remove and replace seven bridges in four sites along LA 485. Three of the sites are located west of I-49 and one site is east of I-49. Each of the sites will be closed to through traffic with no onsite diversions.

Beginning April 10th, the Site 4 Bridge will be closed to traffic. Related work will includes removing the existing timber trestle bridge, installing bedding material, setting reinforced concrete box culverts, pouring headwalls, placing riprap, back filling the roadway, class II base course, hot mixed asphalt pavement, permanent striping and other related work.

The public is advised to remain alert to construction signs and changing roadway conditions along LA 485.

The project was awarded to the low bidder, Merrick, LLC, of Cottonport, LA in the amount of $13,727,495.43 and will take approximately 700 calendar days to complete all four sites. Site Four (4) is expected to be completed by the end of September 2023.

Permit/Detour section
Northbound traffic will be detoured south on I-49 to LA 6 East to LA 1 North to LA 485.
Southbound traffic will be detoured south on LA 1 to LA 6 West to I-49 North to LA 485.

Safety Reminder
DOTD appreciates your patience and reminds you to please drive with caution through the construction site and be on the lookout for work crews and their equipment.

Additional Information
Motorists can access the latest updates on real time traffic and road conditions using the 511 Traveler Information System and saying the route or region on which they are seeking information. Out of state travelers can also access this information by visiting the 511 Traveler Information Website at Additionally, you can follow the Traffic Management Center on Twitter: (@Alex Traffic). Motorists may also monitor the La DOTD website @ and the DOTD Facebook page.

Media Contact Information
Mrs. Erin Buchanan Mills
Public Information Officer 3
District 08: Avoyelles, Grant, Natchitoches, Rapides, Sabine, Vernon, and Winn Parishes
Phone: (318) 549-8402
Cell: (318) 347-2076

Project Contacts
Mr. Jared Taylor, M.S., P.E.
Natchitoches Parish Project Engineer
Office: (318) 357-3158 or (318) 357-3159

Mr. Joseph Montalvo, M.S., P.E.
Area Engineer for Grant, Natchitoches, and Winn Parishes
Office: (318) 561-5120