US Bridges

IH 35 over US 79

Fair

Williamson County, Texas · 0.5 MI N of FM 620 · Structure no. 142460001509177

Built
1990
35 years old
Condition
Fair
inspected January 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
280 ft
4 main spans
Daily traffic
138,115
2019 count
Owner
State
State Highway Agency

About this bridge

IH 35 over US 79 is a prestressed concrete box beam or girders - multiple carrying IH 35 over US 79 in Williamson County, Texas. It was built in 1990, so it is 35 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 138,115 vehicles a day, roughly 12% of them trucks, projected to reach 207,493 by 2039. The structure is 280 ft (85.3 m) long and 128 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIH 35
CrossesUS 79
Location0.5 MI N of FM 620
RouteInterstate 35
CountyWilliamson County
StateTexas
Coordinates30.51714, -97.68798
Functional classUrban Principal Arterial - Interstate

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length280 ft (85.3 m)
Longest span80 ft (24.4 m)
Deck width128 ft (39.1 m)
Roadway width123 ft (37.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic138,115 (2019)
Projected traffic207,493 by 2039
Trucks12%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$86,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 35 over US 79 built?

It was built in 1990, making it 35 years old in 2025.

What condition is IH 35 over US 79 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 January 2023.

How much traffic does IH 35 over US 79 carry?

About 138,115 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is IH 35 over US 79?

The structure is 280 ft (85.3 m) long with a longest span of 80 ft (24.4 m) and a deck 128 ft wide.

Who owns IH 35 over US 79?

It is owned by the State Highway Agency.