Structure 81150000505277 · Howard County, TX

US 87 NB over IH 20

Carries US 87 NB over IH 20, Intersection @ IH 20.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT686 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

686 ft end to end, longest span 118 ft: about 1.9 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.

Built20206 years old
Length686.0 ft209.1 m
Daily traffic864counted 2020
Last inspectedApril 2024every 48 months

Location

StateTexas
CountyHoward
LocationIntersection @ IH 20
CarriesUS 87 NB
CrossesIH 20
Coordinates32.22836, -101.54609

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length686.0 ft (209.1 m)
Max Span118.1 ft (36 m)
Deck Width40.0 ft (12.2 m)
Deck Area2551.0 sq m
Main Spans6
Year Built2020

Traffic

Avg Daily Traffic864 (2020)
Truck Traffic13%
Lanes On Bridge2
Lanes Under Bridge8

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number081150000505277

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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