Structure 101080016303040 · Henderson County, TX

SH 31 WB over Trinity River

Carries SH 31 WB over Trinity River, 0.4 Mi W Of SH 274.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT3,710 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

3,710 ft end to end, longest span 310 ft: about 10 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.

Built197155 years old
Length3710.0 ft1130.8 m
Daily traffic3,723counted 2019
Last inspectedFebruary 2023every 24 months

Location

StateTexas
CountyHenderson
Location0.4 Mi W Of SH 274
CarriesSH 31 WB
CrossesTrinity River
Coordinates32.14825, -96.10610

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length3710.0 ft (1130.8 m)
Max Span310.0 ft (94.5 m)
Deck Width44.3 ft (13.5 m)
Deck Area15265.8 sq m
Main Spans3
Year Built1971

Traffic

Avg Daily Traffic3,723 (2019)
Truck Traffic16%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical5 — Stable for scour
Structure Number101080016303040

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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