Structure 201460351009335 · Liberty County, TX

SH 99 over Dayton Canal

Carries SH 99 over Dayton Canal, 0.75 Mi SE Of US 90.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT57 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 57 ft across with 3 openings. Lengths and the car 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, so those are drawn as typical for a culvert.

Built20224 years old
Length57.1 ft17.4 m
Daily traffic3,800counted 2022
Last inspectedJuly 2024every 24 months

Location

StateTexas
CountyLiberty
Location0.75 Mi SE Of US 90
CarriesSH 99
CrossesDayton Canal
Coordinates30.00182, -94.93056

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length57.1 ft (17.4 m)
Max Span11.2 ft (3.4 m)
Deck Area466.3 sq m
Main Spans3
Year Built2022

Traffic

Avg Daily Traffic3,800 (2022)
Truck Traffic10%
Lanes On Bridge5

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number201460351009335

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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