US Bridges

Bluff Springs Road over Onion Creek

Fair

Travis County, Texas · 2.15 MI S of Will Cannon · Structure no. 142270AA1766001

Built
1971
54 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
261 ft
1 main span
Daily traffic
3,713
2020 count
Owner
County
County Highway Agency

About this bridge

Bluff Springs Road over Onion Creek is a prestressed concrete stringer/multi-beam or girder carrying Bluff Springs Road over Onion Creek 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 3,713 vehicles a day, projected to reach 960 by 2032. The structure is 261 ft (79.6 m) long and 38 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesBluff Springs Road
CrossesOnion Creek
Location2.15 MI S of Will Cannon
RouteCounty Highway 0
CountyTravis County
StateTexas
Coordinates30.15927, -97.76956
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadUnknown
Structure length261 ft (79.6 m)
Longest span80 ft (24.4 m)
Deck width38 ft (11.6 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,713 (2020)
Projected traffic960 by 2032
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$391,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Bluff Springs Road over Onion Creek built?

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

What condition is Bluff Springs Road 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 May 2024.

How much traffic does Bluff Springs Road over Onion Creek carry?

About 3,713 vehicles per day (2020 count).

How long is Bluff Springs Road over Onion Creek?

The structure is 261 ft (79.6 m) long with a longest span of 80 ft (24.4 m) and a deck 38 ft wide.

Who owns Bluff Springs Road over Onion Creek?

It is owned by the County Highway Agency.