Structure 131430026902004 · Lavaca County, TX

US 77 over Mixon Creek

Carries US 77 over Mixon Creek, 1.60 Mi S Of FM 532e.

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 overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT156 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

156 ft end to end, longest span 39 ft: about 2 semi-trucks nose to tail. 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 tee-beam bridge.

Built1925rebuilt 1956
Length155.8 ft47.5 m
Daily traffic5,158counted 2020
Last inspectedMarch 2023every 24 months

Location

StateTexas
CountyLavaca
Location1.60 Mi S Of FM 532e
CarriesUS 77
CrossesMixon Creek
Coordinates29.53537, -96.91142

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length155.8 ft (47.5 m)
Max Span39.0 ft (11.9 m)
Deck Width42.0 ft (12.8 m)
Deck Area608 sq m
Main Spans4
Year Built1925 (reconstructed 1956)

Traffic

Avg Daily Traffic5,158 (2020)
Truck Traffic14%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical5 — Stable for scour
Structure Number131430026902004

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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