Structure 210310032708032 · Cameron County, TX

US 77 NB over Orphanage RD

Carries US 77 NB over Orphanage RD, 4.00 Mi NW Of FM 508.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT165 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

165 ft end to end, longest span 65 ft: about 2 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.

Built197452 years old
Length165.0 ft50.3 m
Daily traffic12,543counted 2023
Last inspectedMarch 2023every 48 months

Location

StateTexas
CountyCameron
Location4.00 Mi NW Of FM 508
CarriesUS 77 NB
CrossesOrphanage RD
Coordinates26.29598, -97.76441

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length165.0 ft (50.3 m)
Max Span65.0 ft (19.8 m)
Deck Width44.3 ft (13.5 m)
Deck Area679.0 sq m
Main Spans3
Year Built1974

Traffic

Avg Daily Traffic12,543 (2023)
Truck Traffic23%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number210310032708032

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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