Structure 142270001513715 · Travis County, TX

Ih35sb To Us183sb over IH 35/us 183

Carries Ih35sb To Us183sb over IH 35/us 183, At Ih35/us183 Intch.

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 FT3,609 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

3,609 ft end to end, longest span 233 ft: about 10 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 box-beam bridge.

Built20215 years old
Length3608.9 ft1,100 m
Daily traffic—reported figure implausible
Last inspectedAugust 2023every 24 months

Location

StateTexas
CountyTravis
LocationAt Ih35/us183 Intch
CarriesIh35sb To Us183sb
CrossesIH 35/us 183
Coordinates30.33728, -97.69727

Physical Characteristics

MaterialSteel
DesignBox Beam - Multiple
Total Length3608.9 ft (1,100 m)
Max Span232.9 ft (71 m)
Deck Width40.0 ft (12.2 m)
Deck Area13,420 sq m
Main Spans4
Year Built2021

Traffic

Avg Daily Traffic137,133 (2012)
That is about 137,133 vehicles per lane per day — beyond what any U.S. road carries (the busiest freeways run about 25,000–30,000). It is almost certainly a data-entry error in the National Bridge Inventory, so we leave this bridge out of traffic rankings.
Truck Traffic9%
Lanes On Bridge1
Lanes Under Bridge18

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number142270001513715

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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