Structure 142270313601035 · Travis County, TX

Lp1 Sbfr To Lp1 SB over Johnson Ck;lk Aus Bl;rmp

Carries Lp1 Sbfr To Lp1 SB over Johnson Ck;lk Aus Bl;rmp, Lady Bird Lake Intchng.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT822 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

822 ft end to end, longest span 95 ft: about 2.3 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.

Built198244 years old
Length821.9 ft250.5 m
Daily traffic11,310counted 2020
Last inspectedSeptember 2023every 24 months

Location

StateTexas
CountyTravis
LocationLady Bird Lake Intchng
CarriesLp1 Sbfr To Lp1 SB
CrossesJohnson Ck;lk Aus Bl;rmp
Coordinates30.27792, -97.76919

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length821.9 ft (250.5 m)
Max Span95.1 ft (29 m)
Deck Width29.9 ft (9.1 m)
Deck Area2279.6 sq m
Main Spans10
Year Built1982

Traffic

Avg Daily Traffic11,310 (2020)
Truck Traffic2%
Lanes On Bridge1
Lanes Under Bridge4

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number142270313601035

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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