Structure 121020050003344 · Harris County, TX

IH 45nb-bw8wb Conn over IH 45 & Bw 8

Carries IH 45nb-bw8wb Conn over IH 45 & Bw 8, 1.80 Mi NW Of FM 1959.

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
5,613 FT OVERALL1,000 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

5,613 ft end to end, longest span 213 ft: about 16 football fields, or 1.1 miles. 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 multi-beam bridge.

Built199630 years old
Length5612.9 ft1710.8 m
Daily traffic42,290counted 2023
Last inspectedNovember 2024every 24 months

Location

StateTexas
CountyHarris
Location1.80 Mi NW Of FM 1959
CarriesIH 45nb-bw8wb Conn
CrossesIH 45 & Bw 8
Coordinates29.60578, -95.20411

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length5612.9 ft (1710.8 m)
Max Span212.9 ft (64.9 m)
Deck Width31.2 ft (9.5 m)
Deck Area16252.6 sq m
Main Spans4
Year Built1996

Traffic

Avg Daily Traffic42,290 (2023)
Truck Traffic10%
Lanes On Bridge1
Lanes Under Bridge34

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number121020050003344

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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