Structure 121700011004126 · Montgomery County, TX

Robinson RD over IH 45

Carries Robinson RD over IH 45, 3.50 Mi S Of SH 242.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT520 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

520 ft end to end, longest span 130 ft: about 7 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.

Built198838 years old
Length520.0 ft158.5 m
Daily traffic22,298counted 2023
Last inspectedAugust 2024every 24 months

Location

StateTexas
CountyMontgomery
Location3.50 Mi S Of SH 242
CarriesRobinson RD
CrossesIH 45
Coordinates30.15704, -95.44929

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length520.0 ft (158.5 m)
Max Span129.9 ft (39.6 m)
Deck Width82.7 ft (25.2 m)
Deck Area3994.2 sq m
Main Spans4
Year Built1988

Traffic

Avg Daily Traffic22,298 (2023)
Truck Traffic3%
Lanes On Bridge4
Lanes Under Bridge18

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number121700011004126

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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