Structure 121020351006158 · Harris County, TX

SH 99 WB over Future Shaw Road

Carries SH 99 WB over Future Shaw Road, 1.35 Mi W Of SH 249.

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
CAR · 15 FT116 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 7/9 · sets the ratingSubstructure 8/9

116 ft end to end. 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 or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built201511 years old
Length116.1 ft35.4 m
Daily traffic4,000counted 2015
Last inspectedOctober 2022every 48 months

Location

StateTexas
CountyHarris
Location1.35 Mi W Of SH 249
CarriesSH 99 WB
CrossesFuture Shaw Road
Coordinates30.05242, -95.63748

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length116.1 ft (35.4 m)
Max Span115.2 ft (35.1 m)
Deck Width55.1 ft (16.8 m)
Deck Area594.7 sq m
Main Spans1
Year Built2015

Traffic

Avg Daily Traffic4,000 (2015)
Truck Traffic5%
Lanes On Bridge3

Inspection & Ownership

Last InspectionOctober 2022
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number121020351006158

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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