Structure 120800351004110 · Fort Bend County, TX

SH 99 SB over Harlem Road

Carries SH 99 SB over Harlem Road, 4.3 Mi N Of US 90a.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT379 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

379 ft end to end: about 5 semi-trucks nose to tail. 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
Length378.6 ft115.4 m
Daily traffic13,650counted 2023
Last inspectedDecember 2024every 24 months

Location

StateTexas
CountyFort Bend
Location4.3 Mi N Of US 90a
CarriesSH 99 SB
CrossesHarlem Road
Coordinates29.65790, -95.71488

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length378.6 ft (115.4 m)
Max Span163.4 ft (49.8 m)
Deck Width42.3 ft (12.9 m)
Deck Area1488.7 sq m
Main Spans1
Year Built2017

Traffic

Avg Daily Traffic13,650 (2023)
Truck Traffic5%
Lanes On Bridge2
Lanes Under Bridge7

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerLocal Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number120800351004110

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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