US Bridges

IH 35 Nbfr over Onion Creek

Fair

Travis County, Texas · 0.1 MI S of Onion Ck Pkwy · Structure no. 142270001601199

Built
1993
32 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
538 ft
6 main spans
Daily traffic
11,297
2023 count
Owner
State
State Highway Agency

About this bridge

IH 35 Nbfr over Onion Creek is a prestressed concrete stringer/multi-beam or girder carrying IH 35 Nbfr over Onion Creek in Travis County, Texas. It was built in 1993, so it is 32 years old, younger 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 5 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 11,297 vehicles a day, roughly 5% of them trucks, projected to reach 14,290 by 2036. The structure is 538 ft (164 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesIH 35 Nbfr
CrossesOnion Creek
Location0.1 MI S of Onion Ck Pkwy
CountyTravis County
StateTexas
Coordinates30.13501, -97.79752
Functional classUrban Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to 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 (+1 approach)
Design loadHS 20
Structure length538 ft (164 m)
Longest span86 ft (26.2 m)
Deck width38 ft (11.6 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,297 (2023)
Projected traffic14,290 by 2036
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was IH 35 Nbfr over Onion Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is IH 35 Nbfr over Onion Creek 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 November 2024.

How much traffic does IH 35 Nbfr over Onion Creek carry?

About 11,297 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is IH 35 Nbfr over Onion Creek?

The structure is 538 ft (164 m) long with a longest span of 86 ft (26.2 m) and a deck 38 ft wide.

Who owns IH 35 Nbfr over Onion Creek?

It is owned by the State Highway Agency.