Structure 121020017706230 · Harris County, TX

US 59 Nbfr over San Jacinto River

Carries US 59 Nbfr over San Jacinto River, 1.7 Mi N Of FM 1960.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,512 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9Substructure 5/9 · sets the rating

1,512 ft end to end, longest span 84 ft: about 4.2 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.

Built200026 years old
Length1512.1 ft460.9 m
Daily traffic499counted 2022
Last inspectedDecember 2024every 24 months

Location

StateTexas
CountyHarris
Location1.7 Mi N Of FM 1960
CarriesUS 59 Nbfr
CrossesSan Jacinto River
Coordinates30.02679, -95.25787

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length1512.1 ft (460.9 m)
Max Span84.0 ft (25.6 m)
Deck Width40.7 ft (12.4 m)
Deck Area5715.2 sq m
Main Spans18
Year Built2000

Traffic

Avg Daily Traffic499 (2022)
Truck Traffic3%
Lanes On Bridge3
Lanes Under Bridge4

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number121020017706230

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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