US Bridges

FM 1 over Thornberg Creek

Good

Sabine County, Texas · 1.95 MI S of SH 103 · Structure no. 112020006405055

Built
1954
71 years old
Condition
Good
inspected June 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
297
2020 count
Owner
State
State Highway Agency

About this bridge

FM 1 over Thornberg Creek is a concrete culvert carrying FM 1 over Thornberg Creek in Sabine County, Texas. It was built in 1954, so it is 71 years old, older than the Texas average of 44.4 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 297 vehicles a day, roughly 27% of them trucks, projected to reach 416 by 2040. The structure is 22 ft (6.7 m) long and 37 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesFM 1
CrossesThornberg Creek
Location1.95 MI S of SH 103
RouteState Highway 1
StateTexas
Coordinates31.38489, -93.99453
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating26.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width37 ft (11.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic297 (2020)
Projected traffic416 by 2040
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 1 over Thornberg Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is FM 1 over Thornberg Creek 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 June 2024.

How much traffic does FM 1 over Thornberg Creek carry?

About 297 vehicles per day (2020 count), of which roughly 27% are trucks.

How long is FM 1 over Thornberg Creek?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 37 ft wide.

Who owns FM 1 over Thornberg Creek?

It is owned by the State Highway Agency.