Structure 121020TOL030008 · Harris County, TX

Wstprk EB / Us59nb over US 59 & Wtpk Tlwy Conn 6

Carries Wstprk EB / Us59nb over US 59 & Wtpk Tlwy Conn 6, 0.50 Mi E Of Hillcroft.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT3,020 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 6/9

3,020 ft end to end, longest span 335 ft: about 8.4 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.

Built200422 years old
Length3020.0 ft920.5 m
Daily traffic10,000counted 2015
Last inspectedDecember 2023every 24 months

Location

StateTexas
CountyHarris
Location0.50 Mi E Of Hillcroft
CarriesWstprk EB / Us59nb
CrossesUS 59 & Wtpk Tlwy Conn 6
Coordinates29.72223, -95.49416

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length3020.0 ft (920.5 m)
Max Span335.0 ft (102.1 m)
Deck Width26.9 ft (8.2 m)
Deck Area7548.1 sq m
Main Spans2
Year Built2004

Traffic

Avg Daily Traffic10,000 (2015)
Truck Traffic5%
Lanes On Bridge1
Lanes Under Bridge20

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerLocal Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number121020TOL030008

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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