US Bridges

Lp 1 NB on Ramp over Natural Ground

Fair

Travis County, Texas · 3.30 MI S of US 183 · Structure no. 142270313601021

Built
1971
54 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
245 ft
6 main spans
Daily traffic
8,163
2023 count
Owner
State
State Highway Agency

About this bridge

Lp 1 NB on Ramp over Natural Ground is a prestressed concrete stringer/multi-beam or girder carrying Lp 1 NB on Ramp over Natural Ground in Travis County, Texas. It was built in 1971, so it is 54 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 8,163 vehicles a day, roughly 2% of them trucks, projected to reach 20,120 by 2033. The structure is 245 ft (74.7 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesLp 1 NB on Ramp
CrossesNatural Ground
Location3.30 MI S of US 183
RouteState Highway 1
CountyTravis County
StateTexas
Coordinates30.33456, -97.75487
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable 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 length245 ft (74.7 m)
Longest span45 ft (13.7 m)
Deck width27 ft (8.1 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,163 (2023)
Projected traffic20,120 by 2033
Trucks2%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesPedestrian / bicycle
Detour if closed3.7 mi (6 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 NB on Ramp over Natural Ground built?

It was built in 1971, making it 54 years old in 2025.

What condition is Lp 1 NB on Ramp over Natural Ground in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.

How much traffic does Lp 1 NB on Ramp over Natural Ground carry?

About 8,163 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Lp 1 NB on Ramp over Natural Ground?

The structure is 245 ft (74.7 m) long with a longest span of 45 ft (13.7 m) and a deck 27 ft wide.

Who owns Lp 1 NB on Ramp over Natural Ground?

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