Structure 180430013504234 · Collin County, TX

US 380 over SH 78

Carries US 380 over SH 78, At Int US 380 & SH 78.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT271 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

271 ft end to end, longest span 114 ft: about 4 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.

Built201115 years old
Length271.0 ft82.6 m
Daily traffic22,010counted 2023
Last inspectedMay 2023every 48 months

Location

StateTexas
CountyCollin
LocationAt Int US 380 & SH 78
CarriesUS 380
CrossesSH 78
Coordinates33.15797, -96.37656

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length271.0 ft (82.6 m)
Max Span113.8 ft (34.7 m)
Deck Width95.1 ft (29 m)
Deck Area2395.4 sq m
Main Spans2
Year Built2011

Traffic

Avg Daily Traffic22,010 (2023)
Truck Traffic12%
Lanes On Bridge4
Lanes Under Bridge4

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number180430013504234

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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