US Bridges

Oak Hollow DR over Onion Branch

Fair

Williamson County, Texas · 0.10 MI SE of FM 3406 · Structure no. 142460E00852001

Built
1996
29 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
75 ft
7 main spans
Daily traffic
280
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Oak Hollow DR over Onion Branch is a concrete culvert carrying Oak Hollow DR over Onion Branch in Williamson County, Texas. It was built in 1996, so it is 29 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 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 280 vehicles a day, roughly 2% of them trucks, projected to reach 500 by 2030. The structure is 75 ft (22.9 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesOak Hollow DR
CrossesOnion Branch
Location0.10 MI SE of FM 3406
RouteCity Street 0
CountyWilliamson County
StateTexas
Coordinates30.53288, -97.70214
Functional classUrban 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
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 typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadUnknown
Structure length75 ft (22.9 m)
Longest span10 ft (3 m)
Deck width60 ft (18.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic280 (2020)
Projected traffic500 by 2030
Trucks2%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Oak Hollow DR over Onion Branch built?

It was built in 1996, making it 29 years old in 2025.

What condition is Oak Hollow DR over Onion Branch 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 Oak Hollow DR over Onion Branch carry?

About 280 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Oak Hollow DR over Onion Branch?

The structure is 75 ft (22.9 m) long with a longest span of 10 ft (3 m) and a deck 60 ft wide.

Who owns Oak Hollow DR over Onion Branch?

It is owned by the City or Municipal Highway Agency.