US Bridges

US 79 NB over Mustang Creek

Fair

Williamson County, Texas · 2.75 MI E of FM 3349 · Structure no. 142460020403057

Built
1952
73 years old, rebuilt 1968
Condition
Fair
inspected March 2023
Type
Slab
Concrete
Length
263 ft
10 main spans
Daily traffic
15,614
2023 count
Owner
State
State Highway Agency

About this bridge

US 79 NB over Mustang Creek is a concrete slab carrying US 79 NB over Mustang Creek in Williamson County, Texas. It was built in 1952 and reconstructed in 1968, so it is 73 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 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 15,614 vehicles a day, roughly 7% of them trucks, projected to reach 16,578 by 2039. The structure is 263 ft (80.2 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 79 NB
CrossesMustang Creek
Location2.75 MI E of FM 3349
RouteU.S. Route 79
CountyWilliamson County
StateTexas
Coordinates30.56666, -97.43913
Functional classRural Principal Arterial - Other

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 inspectionMarch 2023
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 rating46 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans10
Design loadOther
Structure length263 ft (80.2 m)
Longest span25 ft (7.6 m)
Deck width50 ft (15.3 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,614 (2023)
Projected traffic16,578 by 2039
Trucks7%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 79 NB over Mustang Creek built?

It was built in 1952, making it 73 years old in 2025. It was reconstructed in 1968.

What condition is US 79 NB over Mustang 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 March 2023.

How much traffic does US 79 NB over Mustang Creek carry?

About 15,614 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 79 NB over Mustang Creek?

The structure is 263 ft (80.2 m) long with a longest span of 25 ft (7.6 m) and a deck 50 ft wide.

Who owns US 79 NB over Mustang Creek?

It is owned by the State Highway Agency.