Structure 50580006805053 · Dawson County, TX

US 180 over US 87

Carries US 180 over US 87, 0.6 Mi SE Of SH 349.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT222 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

222 ft end to end, longest span 60 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.

Built196561 years old
Length222.1 ft67.7 m
Daily traffic1,460counted 2013
Last inspectedJuly 2023every 48 months

Location

StateTexas
CountyDawson
Location0.6 Mi SE Of SH 349
CarriesUS 180
CrossesUS 87
Coordinates32.70215, -101.91891

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length222.1 ft (67.7 m)
Max Span60.0 ft (18.3 m)
Deck Width46.3 ft (14.1 m)
Deck Area954.6 sq m
Main Spans4
Year Built1965

Traffic

Avg Daily Traffic1,460 (2013)
Truck Traffic20%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number050580006805053

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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