Structure 121020017707386 · Harris County, TX

Bw 8 EB To Us59 NB over US 59 & Bw 8

Carries Bw 8 EB To Us59 NB over US 59 & Bw 8, Bwy 8/us59 N Interchange.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
4,361 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

4,361 ft end to end, longest span 289 ft: about 12 football fields. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 bridge of this kind.

Built200224 years old
Length4360.9 ft1329.2 m
Daily traffic8,754counted 2021
Last inspectedOctober 2024every 24 months

Location

StateTexas
CountyHarris
LocationBwy 8/us59 N Interchange
CarriesBw 8 EB To Us59 NB
CrossesUS 59 & Bw 8
Coordinates29.93964, -95.30105

Physical Characteristics

MaterialSteel Continuous
DesignOther
Total Length4360.9 ft (1329.2 m)
Max Span289.0 ft (88.1 m)
Deck Width28.5 ft (8.7 m)
Deck Area11564.0 sq m
Main Spans9
Year Built2002

Traffic

Avg Daily Traffic8,754 (2021)
Truck Traffic3%
Lanes On Bridge1
Lanes Under Bridge19

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number121020017707386

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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