Structure 210310068401248 · Cameron County, TX

SH 550 NB over Up Rr #1

Carries SH 550 NB over Up Rr #1, 3.20 Mi SE Of US 77.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT225 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

225 ft end to end, longest span 75 ft: about 3 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.

Built201016 years old
Length225.1 ft68.6 m
Daily traffic13,400counted 2010
Last inspectedMarch 2023every 48 months

Location

StateTexas
CountyCameron
Location3.20 Mi SE Of US 77
CarriesSH 550 NB
CrossesUp Rr #1
Coordinates26.01633, -97.48425

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length225.1 ft (68.6 m)
Max Span75.1 ft (22.9 m)
Deck Width41.0 ft (12.5 m)
Deck Area857.5 sq m
Main Spans3
Year Built2010

Traffic

Avg Daily Traffic13,400 (2010)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 48 months
OwnerLocal Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number210310068401248

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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