Structure 81770000615009 · Nolan County, TX

Bi 20 over At And Sf Rr Walnut ST

Carries Bi 20 over At And Sf Rr Walnut ST, 0.35 Mi SW Of SH 70 Bus.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT657 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

657 ft end to end, longest span 80 ft: about 1.8 football fields. 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.

Built1935rebuilt 2008
Length657.2 ft200.3 m
Daily traffic4,700counted 2013
Last inspectedMarch 2023every 24 months

Location

StateTexas
CountyNolan
Location0.35 Mi SW Of SH 70 Bus
CarriesBi 20
CrossesAt And Sf Rr Walnut ST
Coordinates32.46846, -100.41190

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length657.2 ft (200.3 m)
Max Span80.1 ft (24.4 m)
Deck Width47.2 ft (14.4 m)
Deck Area2884.3 sq m
Main Spans3
Year Built1935 (reconstructed 2008)

Traffic

Avg Daily Traffic4,700 (2013)
Truck Traffic28%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Scour CriticalNot applicable
Structure Number081770000615009

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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