US Bridges

Gilliam Scotts Slu over Tributary to Kelly Bayou

FairPosted for load

Caddo Parish, Louisiana · 1.6 MI S of Int 531 · Structure no. 040932583935131

Built
1980
45 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete
Length
59 ft
3 main spans
Daily traffic
59
2019 count
Owner
County
County Highway Agency

About this bridge

Gilliam Scotts Slu over Tributary to Kelly Bayou is a concrete slab carrying Gilliam Scotts Slu over Tributary to Kelly Bayou in Caddo Parish, Louisiana. It was built in 1980, so it is 45 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 59 vehicles a day, projected to reach 64 by 2039. The structure is 59 ft (18 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesGilliam Scotts Slu
CrossesTributary to Kelly Bayou
Location1.6 MI S of Int 531
RouteCounty Highway 0
CountyCaddo Parish
StateLouisiana
Coordinates32.97212, -93.85593
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length59 ft (18 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59 (2019)
Projected traffic64 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Gilliam Scotts Slu over Tributary to Kelly Bayou built?

It was built in 1980, making it 45 years old in 2025.

What condition is Gilliam Scotts Slu over Tributary to Kelly Bayou in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does Gilliam Scotts Slu over Tributary to Kelly Bayou carry?

About 59 vehicles per day (2019 count).

How long is Gilliam Scotts Slu over Tributary to Kelly Bayou?

The structure is 59 ft (18 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns Gilliam Scotts Slu over Tributary to Kelly Bayou?

It is owned by the County Highway Agency.