Structure 120800351004115 · Fort Bend County, TX

SH 99 SB over Westpark Tollway

Carries SH 99 SB over Westpark Tollway, @ Westpark Toll Intersect.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,680 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

1,680 ft end to end, longest span 120 ft: about 4.7 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.

Built20179 years old
Length1680.1 ft512.1 m
Daily traffic32,000counted 2019
Last inspectedDecember 2022every 48 months

Location

StateTexas
CountyFort Bend
Location@ Westpark Toll Intersect
CarriesSH 99 SB
CrossesWestpark Tollway
Coordinates29.70063, -95.77598

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length1680.1 ft (512.1 m)
Max Span120.1 ft (36.6 m)
Deck Width42.3 ft (12.9 m)
Deck Area6606.1 sq m
Main Spans15
Year Built2017

Traffic

Avg Daily Traffic32,000 (2019)
Truck Traffic4%
Lanes On Bridge2
Lanes Under Bridge11

Inspection & Ownership

Last InspectionDecember 2022
Inspection FrequencyEvery 48 months
OwnerLocal Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number120800351004115

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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