US Bridges

SH 103 over Ayish Bayou

Fair

San Augustine County, Texas · 0.50 MI E of FM 705 · Structure no. 112030033607021

Built
1953
72 years old, rebuilt 1992
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
560 ft
21 main spans
Daily traffic
2,075
2024 count
Owner
State
State Highway Agency

About this bridge

SH 103 over Ayish Bayou is a concrete continuous slab carrying SH 103 over Ayish Bayou in San Augustine County, Texas. It was built in 1953 and reconstructed in 1992, so it is 72 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 5 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 2,075 vehicles a day, roughly 24% of them trucks, projected to reach 3,291 by 2040. The structure is 560 ft (170.7 m) long and 46 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesSH 103
CrossesAyish Bayou
Location0.50 MI E of FM 705
RouteState Highway 103
CountySan Augustine County
StateTexas
Coordinates31.39617, -94.15086
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans21
Design loadH 20
Structure length560 ft (170.7 m)
Longest span30 ft (9.1 m)
Deck width46 ft (14.1 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,075 (2024)
Projected traffic3,291 by 2040
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 103 over Ayish Bayou built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1992.

What condition is SH 103 over Ayish Bayou 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 103 over Ayish Bayou carry?

About 2,075 vehicles per day (2024 count), of which roughly 24% are trucks.

How long is SH 103 over Ayish Bayou?

The structure is 560 ft (170.7 m) long with a longest span of 30 ft (9.1 m) and a deck 46 ft wide.

Who owns SH 103 over Ayish Bayou?

It is owned by the State Highway Agency.