US Bridges

Southwestern Blvd over Smith Branch

Fair

Williamson County, Texas · 0.40 MI S of SH 29 · Structure no. 142460D00590001

Built
1986
39 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
221 ft
5 main spans
Daily traffic
1,692
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Southwestern Blvd over Smith Branch is a concrete stringer/multi-beam or girder carrying Southwestern Blvd over Smith Branch in Williamson County, Texas. It was built in 1986, so it is 39 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 1,692 vehicles a day, projected to reach 400 by 2030. The structure is 221 ft (67.4 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSouthwestern Blvd
CrossesSmith Branch
Location0.40 MI S of SH 29
RouteCity Street 0
CountyWilliamson County
StateTexas
Coordinates30.62941, -97.65638
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
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 geometry8: Equal 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 typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadUnknown
Structure length221 ft (67.4 m)
Longest span44 ft (13.4 m)
Deck width58 ft (17.6 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,692 (2020)
Projected traffic400 by 2030
Trucks0%
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 Southwestern Blvd over Smith Branch built?

It was built in 1986, making it 39 years old in 2025.

What condition is Southwestern Blvd over Smith 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 October 2023.

How much traffic does Southwestern Blvd over Smith Branch carry?

About 1,692 vehicles per day (2020 count).

How long is Southwestern Blvd over Smith Branch?

The structure is 221 ft (67.4 m) long with a longest span of 44 ft (13.4 m) and a deck 58 ft wide.

Who owns Southwestern Blvd over Smith Branch?

It is owned by the City or Municipal Highway Agency.