US Bridges

IH 35 over San Antonio River

Fair

Bexar County, Texas · 0.2 MI W of IH 37 · Structure no. 150150001710098

Built
1954
71 years old, rebuilt 1989
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
567 ft
3 main spans
Daily traffic
135,478
2022 count
Owner
State
State Highway Agency

About this bridge

IH 35 over San Antonio River is a steel continuous stringer/multi-beam or girder carrying IH 35 over San Antonio River in Bexar County, Texas. It was built in 1954 and reconstructed in 1989, so it is 71 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 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 135,478 vehicles a day, roughly 10% of them trucks, projected to reach 189,669 by 2042. The structure is 567 ft (172.8 m) long and 148 ft wide.

Location

Open in Google Maps
CarriesIH 35
CrossesSan Antonio River
Location0.2 MI W of IH 37
RouteInterstate 35
CountyBexar County
StateTexas
Coordinates29.43978, -98.48199
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
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 geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+5 approach)
Design loadHS 20
Structure length567 ft (172.8 m)
Longest span73 ft (22.3 m)
Deck width148 ft (45.1 m)
Roadway width143 ft (43.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic135,478 (2022)
Projected traffic189,669 by 2042
Trucks10%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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$7.6 million
NavigationNo navigation control on waterway

Frequently asked questions

When was IH 35 over San Antonio River built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1989.

What condition is IH 35 over San Antonio 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 June 2024.

How much traffic does IH 35 over San Antonio River carry?

About 135,478 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is IH 35 over San Antonio River?

The structure is 567 ft (172.8 m) long with a longest span of 73 ft (22.3 m) and a deck 148 ft wide.

Who owns IH 35 over San Antonio River?

It is owned by the State Highway Agency.