US Bridges

Line RD over Gum Slough

Fair

Calcasieu Parish, Louisiana · 0.3 MI West of LA 109 · Structure no. 071030136933861

Built
1986
39 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
57 ft
3 main spans
Daily traffic
291
2023 count
Owner
County
County Highway Agency

About this bridge

Line RD over Gum Slough is a concrete slab carrying Line RD over Gum Slough in Calcasieu 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 291 vehicles a day, projected to reach 320 by 2043. The structure is 57 ft (17.4 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLine RD
CrossesGum Slough
Location0.3 MI West of LA 109
RouteCounty Highway 0
CountyCalcasieu Parish
StateLouisiana
Coordinates30.22709, -93.64424
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.5 US tons
Inventory rating20.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span19 ft (5.8 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic291 (2023)
Projected traffic320 by 2043
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Line RD over Gum Slough built?

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

What condition is Line RD over Gum Slough 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 May 2024.

How much traffic does Line RD over Gum Slough carry?

About 291 vehicles per day (2023 count).

How long is Line RD over Gum Slough?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 27 ft wide.

Who owns Line RD over Gum Slough?

It is owned by the County Highway Agency.