Structure 112030033607039 · San Augustine County, TX

SH 103 over Attoyac Bayou

Carries SH 103 over Attoyac Bayou, 2.00 Mi E Of FM 1277.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
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 FT640 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 5/9

640 ft end to end, longest span 40 ft: about 1.8 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 multi-beam bridge.

Built196561 years old
Length640.1 ft195.1 m
Daily traffic5,015counted 2020
Last inspectedMay 2024every 24 months

Location

StateTexas
CountySan Augustine
Location2.00 Mi E Of FM 1277
CarriesSH 103
CrossesAttoyac Bayou
Coordinates31.38329, -94.32318

Physical Characteristics

MaterialConcrete
DesignStringer/Multi-beam
Total Length640.1 ft (195.1 m)
Max Span40.0 ft (12.2 m)
Deck Width34.8 ft (10.6 m)
Deck Area2068.1 sq m
Main Spans16
Year Built1965

Traffic

Avg Daily Traffic5,015 (2020)
Truck Traffic16%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical5 — Stable for scour
Structure Number112030033607039

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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