US Bridges

FM 318 over Supplejack Creek

Fair

Lavaca County, Texas · 0.75 MI NE of SH 111 · Structure no. 131430169601001

Built
1930
95 years old, rebuilt 1966
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
60 ft
2 main spans
Daily traffic
2,356
2024 count
Owner
State
State Highway Agency

About this bridge

FM 318 over Supplejack Creek is a concrete continuous slab carrying FM 318 over Supplejack Creek in Lavaca County, Texas. It was built in 1930 and reconstructed in 1966, so it is 95 years old, older than the Texas average of 44.4 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 2,356 vehicles a day, roughly 16% of them trucks, projected to reach 3,304 by 2042. The structure is 60 ft (18.3 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFM 318
CrossesSupplejack Creek
Location0.75 MI NE of SH 111
RouteState Highway 318
CountyLavaca County
StateTexas
Coordinates29.29005, -97.1293
Functional classRural Major Collector

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+1 approach)
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span20 ft (6.1 m)
Deck width35 ft (10.8 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,356 (2024)
Projected traffic3,304 by 2042
Trucks16%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 318 over Supplejack Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1966.

What condition is FM 318 over Supplejack Creek 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 November 2024.

How much traffic does FM 318 over Supplejack Creek carry?

About 2,356 vehicles per day (2024 count), of which roughly 16% are trucks.

How long is FM 318 over Supplejack Creek?

The structure is 60 ft (18.3 m) long with a longest span of 20 ft (6.1 m) and a deck 35 ft wide.

Who owns FM 318 over Supplejack Creek?

It is owned by the State Highway Agency.