Structure 121020325603491 · Harris County, TX

Bw 8 over Tidwell RD

Carries Bw 8 over Tidwell RD, 1.6 Mi N Of US 90.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,606 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

1,606 ft end to end, longest span 116 ft: about 4.5 football fields. 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.

Built201115 years old
Length1606.0 ft489.5 m
Daily traffic40,500counted 2016
Last inspectedSeptember 2022every 48 months

Location

StateTexas
CountyHarris
Location1.6 Mi N Of US 90
CarriesBw 8
CrossesTidwell RD
Coordinates29.85328, -95.18707

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length1606.0 ft (489.5 m)
Max Span116.1 ft (35.4 m)
Deck Width125.7 ft (38.3 m)
Deck Area18747.8 sq m
Main Spans15
Year Built2011

Traffic

Avg Daily Traffic40,500 (2016)
Truck Traffic5%
Lanes On Bridge6
Lanes Under Bridge6

Inspection & Ownership

Last InspectionSeptember 2022
Inspection FrequencyEvery 48 months
OwnerLocal Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number121020325603491

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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