Structure 120850050004034 · Galveston County, TX

IH 45 over Drainage Ditch

Carries IH 45 over Drainage Ditch, 1.50 Mi SE Of FM 519.

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 FT38 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 38 ft across with 6 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.

Built1948rebuilt 1980
Length38.1 ft11.6 m
Daily traffic40,876counted 2020
Last inspectedSeptember 2024every 24 months

Location

StateTexas
CountyGalveston
Location1.50 Mi SE Of FM 519
CarriesIH 45
CrossesDrainage Ditch
Coordinates29.34790, -94.95721

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length38.1 ft (11.6 m)
Max Span5.9 ft (1.8 m)
Deck Area692.5 sq m
Main Spans6
Year Built1948 (reconstructed 1980)

Traffic

Avg Daily Traffic40,876 (2020)
Truck Traffic4%
Lanes On Bridge11

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number120850050004034

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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