Structure 121020017707543 · Harris County, TX

Us59 NB Con/bw8 EB over Bw 8 Ebfr

Carries Us59 NB Con/bw8 EB over Bw 8 Ebfr, Bw 8/us 59 N Interchange.

Overall conditionGood

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

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

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,255 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

1,255 ft end to end, longest span 182 ft: about 3.5 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 box-beam bridge.

Built201214 years old
Length1254.9 ft382.5 m
Daily traffic20,643counted 2021
Last inspectedOctober 2024every 24 months

Location

StateTexas
CountyHarris
LocationBw 8/us 59 N Interchange
CarriesUs59 NB Con/bw8 EB
CrossesBw 8 Ebfr
Coordinates29.93917, -95.29467

Physical Characteristics

MaterialSteel Continuous
DesignBox Beam - Multiple
Total Length1254.9 ft (382.5 m)
Max Span182.1 ft (55.5 m)
Deck Width28.9 ft (8.8 m)
Deck Area3,366 sq m
Main Spans2
Year Built2012

Traffic

Avg Daily Traffic20,643 (2021)
Truck Traffic3%
Lanes On Bridge1
Lanes Under Bridge2

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 Number121020017707543

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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