Structure 121020325604312 · Harris County, TX

Bw 8 Wbml over Bnsf Rr & Mykawa RD

Carries Bw 8 Wbml over Bnsf Rr & Mykawa RD, 0.70 Mi W Of SH 35.

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 FT1,778 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

1,778 ft end to end, longest span 117 ft: about 4.9 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.

Built1997rebuilt 2018
Length1777.9 ft541.9 m
Daily traffic9,755counted 2012
Last inspectedAugust 2022every 48 months

Location

StateTexas
CountyHarris
Location0.70 Mi W Of SH 35
CarriesBw 8 Wbml
CrossesBnsf Rr & Mykawa RD
Coordinates29.60051, -95.29751

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length1777.9 ft (541.9 m)
Max Span117.1 ft (35.7 m)
Deck Width71.5 ft (21.8 m)
Deck Area11813.4 sq m
Main Spans16
Year Built1997 (reconstructed 2018)

Traffic

Avg Daily Traffic9,755 (2012)
Truck Traffic7%
Lanes On Bridge4
Lanes Under Bridge6

Inspection & Ownership

Last InspectionAugust 2022
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number121020325604312

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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