US Bridges

Lp 1 SB to 5th ST over Johnson Crk /6th ST /Rmp

Good

Travis County, Texas · Lady Bird Lake Intchng · Structure no. 142270313601034

Built
1975
50 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
511 ft
6 main spans
Daily traffic
14,120
2016 count
Owner
State
State Highway Agency

About this bridge

Lp 1 SB to 5th ST over Johnson Crk /6th ST /Rmp is a prestressed concrete stringer/multi-beam or girder carrying Lp 1 SB to 5th ST over Johnson Crk /6th ST /Rmp 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 2036. The structure is 511 ft (155.8 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesLp 1 SB to 5th ST
CrossesJohnson Crk /6th ST /Rmp
LocationLady Bird Lake Intchng
RouteState Highway 1
CountyTravis County
StateTexas
Coordinates30.27644, -97.76809
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 protection8 Very GoodNo problems noted.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6 (+1 approach)
Design loadHS 20
Structure length511 ft (155.8 m)
Longest span83 ft (25.3 m)
Deck width32 ft (9.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,120 (2016)
Projected traffic19,760 by 2036
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and waterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 Lp 1 SB to 5th ST over Johnson Crk /6th ST /Rmp built?

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

What condition is Lp 1 SB to 5th ST over Johnson Crk /6th ST /Rmp 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 Lp 1 SB to 5th ST over Johnson Crk /6th ST /Rmp carry?

About 14,120 vehicles per day (2016 count), of which roughly 2% are trucks.

How long is Lp 1 SB to 5th ST over Johnson Crk /6th ST /Rmp?

The structure is 511 ft (155.8 m) long with a longest span of 83 ft (25.3 m) and a deck 32 ft wide.

Who owns Lp 1 SB to 5th ST over Johnson Crk /6th ST /Rmp?

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