Structure 112030033607021 · San Augustine County, TX

SH 103 over Ayish Bayou

Carries SH 103 over Ayish Bayou, 0.50 Mi E Of FM 705.

Overall conditionFair

Set by its lowest-rated component: Deck and Substructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT560 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 5/9 · sets the rating

560 ft end to end, longest span 30 ft: about 1.6 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built1953rebuilt 1992
Length560.0 ft170.7 m
Daily traffic2,075counted 2024
Last inspectedMay 2024every 24 months

Location

StateTexas
CountySan Augustine
Location0.50 Mi E Of FM 705
CarriesSH 103
CrossesAyish Bayou
Coordinates31.39617, -94.15086

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length560.0 ft (170.7 m)
Max Span29.9 ft (9.1 m)
Deck Width46.3 ft (14.1 m)
Deck Area2406.9 sq m
Main Spans21
Year Built1953 (reconstructed 1992)

Traffic

Avg Daily Traffic2,075 (2024)
Truck Traffic24%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number112030033607021

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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