US Bridges

1st St/Lk Aus Ramp over Johnson Creek

Good

Travis County, Texas · Lady Bird Lake Intchng · Structure no. 142270313601028

Built
1975
50 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
345 ft
6 main spans
Daily traffic
14,120
2013 count
Owner
State
State Highway Agency

About this bridge

1st St/Lk Aus Ramp over Johnson Creek is a prestressed concrete stringer/multi-beam or girder carrying 1st St/Lk Aus Ramp over Johnson Creek in Travis County, Texas. It was built in 1975, so it is 50 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 14,120 vehicles a day, roughly 2% of them trucks, projected to reach 19,760 by 2033. The structure is 345 ft (105.2 m) long and 27 ft wide.

Location

Open in Google Maps
Carries1st St/Lk Aus Ramp
CrossesJohnson Creek
LocationLady Bird Lake Intchng
RouteState Highway 1
CountyTravis County
StateTexas
Coordinates30.27723, -97.76798
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length345 ft (105.2 m)
Longest span70 ft (21.3 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,120 (2013)
Projected traffic19,760 by 2033
Trucks2%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byLocal Toll Authority
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 1st St/Lk Aus Ramp over Johnson Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is 1st St/Lk Aus Ramp over Johnson Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does 1st St/Lk Aus Ramp over Johnson Creek carry?

About 14,120 vehicles per day (2013 count), of which roughly 2% are trucks.

How long is 1st St/Lk Aus Ramp over Johnson Creek?

The structure is 345 ft (105.2 m) long with a longest span of 70 ft (21.3 m) and a deck 27 ft wide.

Who owns 1st St/Lk Aus Ramp over Johnson Creek?

It is owned by the State Highway Agency and maintained by the Local Toll Authority.