Structure 121020005006462 · Harris County, TX

SH 99n To US 290e over US 290 Ebfr; Uprr; Mound

Carries SH 99n To US 290e over US 290 Ebfr; Uprr; Mound, 0.3 Mi W Of Fairfield Pl.

Overall conditionGood

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

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

Elevation

Side view, colored by inspection rating
4,420 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

4,420 ft end to end, longest span 241 ft: about 12 football fields. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 bridge of this kind.

Built201313 years old
Length4419.9 ft1347.2 m
Daily traffic5,847counted 2024
Last inspectedSeptember 2024every 24 months

Location

StateTexas
CountyHarris
Location0.3 Mi W Of Fairfield Pl
CarriesSH 99n To US 290e
CrossesUS 290 Ebfr; Uprr; Mound
Coordinates29.99563, -95.76847

Physical Characteristics

MaterialSteel Continuous
DesignOther
Total Length4419.9 ft (1347.2 m)
Max Span241.1 ft (73.5 m)
Deck Width28.2 ft (8.6 m)
Deck Area11585.9 sq m
Main Spans3
Year Built2013

Traffic

Avg Daily Traffic5,847 (2024)
Truck Traffic5%
Lanes On Bridge1
Lanes Under Bridge9

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number121020005006462

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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