Structure 120800351004017 · Fort Bend County, TX

SH 99 over Brazos River

Carries SH 99 over Brazos River, 1.65 Mi NE Of US 59.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating4/9 · Poor
Channelnot part of overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,200 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 7/9Substructure 4/9 · sets the rating

1,200 ft end to end, longest span 235 ft: about 3.3 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.

Built199432 years old
Length1200.1 ft365.8 m
Daily traffic18,866counted 2023
Last inspectedSeptember 2024every 12 months

Location

StateTexas
CountyFort Bend
Location1.65 Mi NE Of US 59
CarriesSH 99
CrossesBrazos River
Coordinates29.58212, -95.67830

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length1200.1 ft (365.8 m)
Max Span234.9 ft (71.6 m)
Deck Width72.8 ft (22.2 m)
Deck Area8120.8 sq m
Main Spans3
Year Built1994

Traffic

Avg Daily Traffic18,866 (2023)
Truck Traffic5%
Lanes On Bridge4

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 12 months
OwnerLocal Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour Critical2 — Bridge closed (monitoring)
Structure Number120800351004017

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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