US Bridges

LA0525 over Gilmer Bayou

Good

Caddo Parish, Louisiana · 1.50 Mi. W. of US 171 · Structure no. 040900970118541

Built
1986
39 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
300 ft
6 main spans
Daily traffic
4,294
2021 count
Owner
State
State Highway Agency

About this bridge

LA0525 over Gilmer Bayou is a prestressed concrete stringer/multi-beam or girder carrying LA0525 over Gilmer Bayou in Caddo Parish, Louisiana. It was built in 1986, so it is 39 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,294 vehicles a day, roughly 10% of them trucks, projected to reach 4,723 by 2041. The structure is 300 ft (91.4 m) long and 37 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesLA0525
CrossesGilmer Bayou
Location1.50 Mi. W. of US 171
RouteState Highway 525
Coordinates32.38633, -93.8314
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84 US tons
Inventory rating43 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length300 ft (91.4 m)
Longest span50 ft (15.2 m)
Deck width37 ft (11.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,294 (2021)
Projected traffic4,723 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0525 over Gilmer Bayou built?

It was built in 1986, making it 39 years old in 2025.

What condition is LA0525 over Gilmer Bayou in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2025.

How much traffic does LA0525 over Gilmer Bayou carry?

About 4,294 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA0525 over Gilmer Bayou?

The structure is 300 ft (91.4 m) long with a longest span of 50 ft (15.2 m) and a deck 37 ft wide.

Who owns LA0525 over Gilmer Bayou?

It is owned by the State Highway Agency.