US Bridges

Old San Antonio RD over Onion Creek

Good

Travis County, Texas · 0.80 MI SW of FM 1626 · Structure no. 142270AA0103502

Built
2021
4 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
654 ft
1 main span
Daily traffic
2,475
2020 count
Owner
County
County Highway Agency

About this bridge

Old San Antonio RD over Onion Creek is a prestressed concrete stringer/multi-beam or girder carrying Old San Antonio RD over Onion Creek in Travis County, Texas. It was built in 2021, so it is 4 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,475 vehicles a day, roughly 3% of them trucks, projected to reach 1 by 1900. The structure is 654 ft (199.2 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesOld San Antonio RD
CrossesOnion Creek
Location0.80 MI SW of FM 1626
RouteCounty Highway 0
StateTexas
Coordinates30.13353, -97.80969
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+9 approach)
Design loadHL 93
Structure length654 ft (199.2 m)
Longest span125 ft (38.1 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,475 (2020)
Projected traffic1 by 1900
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Old San Antonio RD over Onion Creek built?

It was built in 2021, making it 4 years old in 2025.

What condition is Old San Antonio RD over Onion 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 May 2024.

How much traffic does Old San Antonio RD over Onion Creek carry?

About 2,475 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Old San Antonio RD over Onion Creek?

The structure is 654 ft (199.2 m) long with a longest span of 125 ft (38.1 m) and a deck 34 ft wide.

Who owns Old San Antonio RD over Onion Creek?

It is owned by the County Highway Agency.