Structure 121020B01905096 · Harris County, TX

Airline DR over Hbt Rr & Stokes ST

Carries Airline DR over Hbt Rr & Stokes ST, 1.0 Mi S Of IH 45.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT522 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 5/9 · sets the rating

522 ft end to end: 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.

Built194185 years old
Length522.0 ft159.1 m
Daily traffic16,820counted 2011
Last inspectedAugust 2023every 24 months

Location

StateTexas
CountyHarris
Location1.0 Mi S Of IH 45
CarriesAirline DR
CrossesHbt Rr & Stokes ST
Coordinates29.81945, -95.38321

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length522.0 ft (159.1 m)
Max Span40.0 ft (12.2 m)
Deck Width62.0 ft (18.9 m)
Deck Area3007.0 sq m
Main Spans1
Year Built1941

Traffic

Avg Daily Traffic16,820 (2011)
Lanes On Bridge4
Lanes Under Bridge4

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour CriticalNot applicable
Structure Number121020B01905096

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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