Structure 121020AA6650006 · Harris County, TX

W Houston PKWY SB over Up Railroad

Carries W Houston PKWY SB over Up Railroad, 1.17 Mi S Of Will Clayton.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT840 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

840 ft end to end: about 2.3 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.

Built200125 years old
Length839.9 ft256 m
Daily traffic16,065counted 2022
Last inspectedAugust 2023every 48 months

Location

StateTexas
CountyHarris
Location1.17 Mi S Of Will Clayton
CarriesW Houston PKWY SB
CrossesUp Railroad
Coordinates29.96736, -95.17007

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length839.9 ft (256 m)
Max Span120.1 ft (36.6 m)
Deck Width38.1 ft (11.6 m)
Deck Area2969.6 sq m
Main Spans1
Year Built2001

Traffic

Avg Daily Traffic16,065 (2022)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number121020AA6650006

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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