US Bridges

FM 356 over Mill Creek

Fair

Trinity County, Texas · 1.40 MI SE of FM 355 · Structure no. 112280047509095

Built
1970
55 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
120 ft
3 main spans
Daily traffic
1,791
2018 count
Owner
State
State Highway Agency

About this bridge

FM 356 over Mill Creek is a concrete stringer/multi-beam or girder carrying FM 356 over Mill Creek in Trinity County, Texas. It was built in 1970, so it is 55 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 120 ft (36.6 m) long and 35 ft wide. If it were closed, the detour would be 32.9 mi (53 km).

CarriesFM 356
CrossesMill Creek
Location1.40 MI SE of FM 355
RouteState Highway 356
StateTexas
Coordinates30.90079, -95.22876
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length120 ft (36.6 m)
Longest span40 ft (12.2 m)
Deck width35 ft (10.8 m)
Roadway width33 ft (10 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 closed32.9 mi (53 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 Mill Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is FM 356 over Mill 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 Mill Creek carry?

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

How long is FM 356 over Mill Creek?

The structure is 120 ft (36.6 m) long with a longest span of 40 ft (12.2 m) and a deck 35 ft wide.

Who owns FM 356 over Mill Creek?

It is owned by the State Highway Agency.