Structure 120800351004029 · Fort Bend County, TX

SH 99 over Harlem RD Channel

Carries SH 99 over Harlem RD Channel, 7.85 Mi N Of US 59.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT54 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 54 ft across with 5 openings. Lengths and the car 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, so those are drawn as typical for a culvert.

Built199432 years old
Length54.1 ft16.5 m
Daily traffic27,300counted 2023
Last inspectedDecember 2024every 24 months

Location

StateTexas
CountyFort Bend
Location7.85 Mi N Of US 59
CarriesSH 99
CrossesHarlem RD Channel
Coordinates29.65989, -95.72065

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length54.1 ft (16.5 m)
Max Span8.9 ft (2.7 m)
Deck Area594 sq m
Main Spans5
Year Built1994

Traffic

Avg Daily Traffic27,300 (2023)
Truck Traffic5%
Lanes On Bridge7

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerLocal Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number120800351004029

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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