Structure 121020325604509 · Harris County, TX

Bw 8 Kirby Ramp over Natural Ground

Carries Bw 8 Kirby Ramp over Natural Ground, Inter Of SH 288 & Bw 8.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT533 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 7/9 · sets the ratingSubstructure 8/9

533 ft end to end, longest span 107 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.

Built20197 years old
Length533.1 ft162.5 m
Daily traffic8,000counted 2012
Last inspectedDecember 2022every 48 months

Location

StateTexas
CountyHarris
LocationInter Of SH 288 & Bw 8
CarriesBw 8 Kirby Ramp
CrossesNatural Ground
Coordinates29.59757, -95.38897

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length533.1 ft (162.5 m)
Max Span107.0 ft (32.6 m)
Deck Width26.9 ft (8.2 m)
Deck Area1332.5 sq m
Main Spans5
Year Built2019

Traffic

Avg Daily Traffic8,000 (2012)
Lanes On Bridge1

Inspection & Ownership

Last InspectionDecember 2022
Inspection FrequencyEvery 48 months
OwnerLocal Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number121020325604509

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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