Structure 81150000506043 · Howard County, TX

IH 20 over Union Pacific Rr

Carries IH 20 over Union Pacific Rr, 1.7 Mi E Of FM 821.

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 FT422 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

422 ft end to end, longest span 42 ft: about 6 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.

Built1956rebuilt 1981
Length421.9 ft128.6 m
Daily traffic18,418counted 2020
Last inspectedJune 2023every 24 months

Location

StateTexas
CountyHoward
Location1.7 Mi E Of FM 821
CarriesIH 20
CrossesUnion Pacific Rr
Coordinates32.31643, -101.21236

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length421.9 ft (128.6 m)
Max Span42.0 ft (12.8 m)
Deck Width80.4 ft (24.5 m)
Deck Area3150.7 sq m
Main Spans10
Year Built1956 (reconstructed 1981)

Traffic

Avg Daily Traffic18,418 (2020)
Truck Traffic36%
Lanes On Bridge4

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number081150000506043

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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