Structure 120850050001123 · Galveston County, TX

IH 45 NB over FM 188

Carries IH 45 NB over FM 188, 1.55 Mi W Of Sp 342.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT200 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

200 ft end to end, longest span 50 ft: about 3 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 multi-beam bridge.

Built196561 years old
Length200.1 ft61 m
Daily traffic60,216counted 2022
Last inspectedAugust 2024every 24 months

Location

StateTexas
CountyGalveston
Location1.55 Mi W Of Sp 342
CarriesIH 45 NB
CrossesFM 188
Coordinates29.28539, -94.86296

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length200.1 ft (61 m)
Max Span49.9 ft (15.2 m)
Deck Width49.5 ft (15.1 m)
Deck Area921.1 sq m
Main Spans4
Year Built1965

Traffic

Avg Daily Traffic60,216 (2022)
Truck Traffic2%
Lanes On Bridge3
Lanes Under Bridge6

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number120850050001123

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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