US Bridges

IH 35 NB over North San Gabriel River

Fair

Williamson County, Texas · 0.2 MI S of FM 2338 · Structure no. 142460001508243

Built
1965
60 years old, rebuilt 2001
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
875 ft
14 main spans
Daily traffic
9,323
2023 count
Owner
State
State Highway Agency

About this bridge

IH 35 NB over North San Gabriel River is a prestressed concrete stringer/multi-beam or girder carrying IH 35 NB over North San Gabriel River in Williamson County, Texas. It was built in 1965 and reconstructed in 2001, so it is 60 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 9,323 vehicles a day, roughly 15% of them trucks, projected to reach 60,711 by 2041. The structure is 875 ft (266.7 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIH 35 NB
CrossesNorth San Gabriel River
Location0.2 MI S of FM 2338
RouteInterstate 35
StateTexas
Coordinates30.64592, -97.68324
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 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 geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans14
Design loadHS 20
Structure length875 ft (266.7 m)
Longest span65 ft (19.8 m)
Deck width58 ft (17.6 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,323 (2023)
Projected traffic60,711 by 2041
Trucks15%
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 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was IH 35 NB over North San Gabriel River built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2001.

What condition is IH 35 NB over North San Gabriel River 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 NB over North San Gabriel River carry?

About 9,323 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is IH 35 NB over North San Gabriel River?

The structure is 875 ft (266.7 m) long with a longest span of 65 ft (19.8 m) and a deck 58 ft wide.

Who owns IH 35 NB over North San Gabriel River?

It is owned by the State Highway Agency.