US Bridges

FM 356 over Sulphur Creek

Fair

Trinity County, Texas · 1.00 MI SE of FM 355 · Structure no. 112280047509064

Built
1954
71 years old, rebuilt 1970
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
27 ft
3 main spans
Daily traffic
1,791
2018 count
Owner
State
State Highway Agency

About this bridge

FM 356 over Sulphur Creek is a concrete culvert carrying FM 356 over Sulphur Creek in Trinity County, Texas. It was built in 1954 and reconstructed in 1970, 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 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 1,791 vehicles a day, roughly 10% of them trucks, projected to reach 2,470 by 2033. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 31.1 mi (50 km).

CarriesFM 356
CrossesSulphur Creek
Location1.00 MI SE of FM 355
RouteState Highway 356
StateTexas
Coordinates30.90301, -95.23451
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,791 (2018)
Projected traffic2,470 by 2033
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 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 356 over Sulphur Creek built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1970.

What condition is FM 356 over Sulphur 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 March 2024.

How much traffic does FM 356 over Sulphur Creek carry?

About 1,791 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is FM 356 over Sulphur Creek?

The structure is 27 ft (8.2 m) long with a longest span of 8 ft (2.4 m).

Who owns FM 356 over Sulphur Creek?

It is owned by the State Highway Agency.