US Bridges

Lp 1 NB Ramp C-4 over Nat Ground / Ped Walkway

Fair

Travis County, Texas · LP1NB to 5th ST · Structure no. 142270313601020

Built
1973
52 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
420 ft
7 main spans
Daily traffic
10,555
2023 count
Owner
State
State Highway Agency

About this bridge

Lp 1 NB Ramp C-4 over Nat Ground / Ped Walkway is a prestressed concrete stringer/multi-beam or girder carrying Lp 1 NB Ramp C-4 over Nat Ground / Ped Walkway in Travis County, Texas. It was built in 1973, so it is 52 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 10,555 vehicles a day, roughly 2% of them trucks, projected to reach 17,170 by 2033. The structure is 420 ft (128 m) long and 45 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesLp 1 NB Ramp C-4
CrossesNat Ground / Ped Walkway
LocationLP1NB to 5th ST
RouteState Highway 1
CountyTravis County
StateTexas
Coordinates30.27544, -97.76822
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.
Superstructure7 GoodSome minor problems.
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 geometry9: Superior to present desirable 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 spans7
Design loadHS 20
Structure length420 ft (128 m)
Longest span75 ft (22.9 m)
Deck width45 ft (13.7 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deck17 ft (5.2 m)

Traffic and service

Average daily traffic10,555 (2023)
Projected traffic17,170 by 2033
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesPedestrian / bicycle
Detour if closed1.9 mi (3 km)
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 Lp 1 NB Ramp C-4 over Nat Ground / Ped Walkway built?

It was built in 1973, making it 52 years old in 2025.

What condition is Lp 1 NB Ramp C-4 over Nat Ground / Ped Walkway 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 Ramp C-4 over Nat Ground / Ped Walkway carry?

About 10,555 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Lp 1 NB Ramp C-4 over Nat Ground / Ped Walkway?

The structure is 420 ft (128 m) long with a longest span of 75 ft (22.9 m) and a deck 45 ft wide.

Who owns Lp 1 NB Ramp C-4 over Nat Ground / Ped Walkway?

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