US Bridges

SH 21 over Trib of Big Creek

Fair

Houston County, Texas · 7.10 MI SW of SH 7 · Structure no. 111140011706054

Built
1936
89 years old, rebuilt 2016
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
2,695
2019 count
Owner
State
State Highway Agency

About this bridge

SH 21 over Trib of Big Creek is a concrete culvert carrying SH 21 over Trib of Big Creek in Houston County, Texas. It was built in 1936 and reconstructed in 2016, so it is 89 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 2,695 vehicles a day, roughly 22% of them trucks, projected to reach 3,650 by 2033. The structure is 23 ft (7 m) long. If it were closed, the detour would be 11.2 mi (18 km).

CarriesSH 21
CrossesTrib of Big Creek
Location7.10 MI SW of SH 7
RouteState Highway 21
StateTexas
Coordinates31.24339, -95.57029
Functional classRural Principal Arterial - Other

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
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
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,695 (2019)
Projected traffic3,650 by 2033
Trucks22%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemYes

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 SH 21 over Trib of Big Creek built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 2016.

What condition is SH 21 over Trib of Big 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 June 2024.

How much traffic does SH 21 over Trib of Big Creek carry?

About 2,695 vehicles per day (2019 count), of which roughly 22% are trucks.

How long is SH 21 over Trib of Big Creek?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).

Who owns SH 21 over Trib of Big Creek?

It is owned by the State Highway Agency.