US Bridges

SH 21 over Tiger Creek

Fair

San Augustine County, Texas · 1.95 MI E of SH 147 · Structure no. 112030006404046

Built
1923
102 years old, rebuilt 1961
Condition
Fair
inspected May 2024
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
1,329
2024 count
Owner
State
State Highway Agency

About this bridge

SH 21 over Tiger Creek is a concrete culvert carrying SH 21 over Tiger Creek in San Augustine County, Texas. It was built in 1923 and reconstructed in 1961, so it is 102 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 1,329 vehicles a day, roughly 15% of them trucks, projected to reach 2,722 by 2040. The structure is 23 ft (7 m) long and 50 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesSH 21
CrossesTiger Creek
Location1.95 MI E of SH 147
RouteState Highway 21
CountySan Augustine County
StateTexas
Coordinates31.52156, -94.06903
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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being 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 typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width50 ft (15.2 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,329 (2024)
Projected traffic2,722 by 2040
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 21 over Tiger Creek built?

It was built in 1923, making it 102 years old in 2025. It was reconstructed in 1961.

What condition is SH 21 over Tiger 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 May 2024.

How much traffic does SH 21 over Tiger Creek carry?

About 1,329 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is SH 21 over Tiger Creek?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m) and a deck 50 ft wide.

Who owns SH 21 over Tiger Creek?

It is owned by the State Highway Agency.