Structure 81770000602309 · Nolan County, TX

Duncan Hastings RD over IH 20

Carries Duncan Hastings RD over IH 20, 4.65 Mi E Of Mitchell C/l.

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 FT350 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

350 ft end to end, longest span 70 ft: about 5 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 tee-beam bridge.

Built196759 years old
Length350.1 ft106.7 m
Daily traffic81counted 2020
Last inspectedMarch 2023every 24 months

Location

StateTexas
CountyNolan
Location4.65 Mi E Of Mitchell C/l
CarriesDuncan Hastings RD
CrossesIH 20
Coordinates32.42520, -100.58506

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length350.1 ft (106.7 m)
Max Span69.9 ft (21.3 m)
Deck Width28.2 ft (8.6 m)
Deck Area917.6 sq m
Main Spans4
Year Built1967

Traffic

Avg Daily Traffic81 (2020)
Lanes On Bridge2
Lanes Under Bridge8

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number081770000602309

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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