Structure 101080016303051 · Henderson County, TX

SH 31 EB over Trinity River

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

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
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 FT2,005 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

2,005 ft end to end, longest span 120 ft: about 5.6 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 multi-beam bridge.

Built198640 years old
Length2004.9 ft611.1 m
Daily traffic3,662counted 2023
Last inspectedFebruary 2023every 24 months

Location

StateTexas
CountyHenderson
Location0.4 Mi W Of SH 274
CarriesSH 31 EB
CrossesTrinity River
Coordinates32.14806, -96.10610

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length2004.9 ft (611.1 m)
Max Span120.1 ft (36.6 m)
Deck Width40.0 ft (12.2 m)
Deck Area7455.4 sq m
Main Spans3
Year Built1986

Traffic

Avg Daily Traffic3,662 (2023)
Truck Traffic24%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number101080016303051

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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