US Bridges

FM 536 over San Antonio River

Good

Wilson County, Texas · 1.20 MI SW of Lp 181 · Structure no. 152470100901006

Built
1957
68 years old, rebuilt 1991
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
432 ft
3 main spans
Daily traffic
2,285
2023 count
Owner
State
State Highway Agency

About this bridge

FM 536 over San Antonio River is a steel continuous stringer/multi-beam or girder carrying FM 536 over San Antonio River in Wilson County, Texas. It was built in 1957 and reconstructed in 1991, so it is 68 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,285 vehicles a day, roughly 6% of them trucks, projected to reach 2,971 by 2042. The structure is 432 ft (131.7 m) long and 42 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesFM 536
CrossesSan Antonio River
Location1.20 MI SW of Lp 181
RouteState Highway 536
StateTexas
Coordinates29.1304, -98.17766
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating28 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+4 approach)
Design loadH 15
Structure length432 ft (131.7 m)
Longest span90 ft (27.4 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deck0 ft (0 m)

Traffic and service

Average daily traffic2,285 (2023)
Projected traffic2,971 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

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 FM 536 over San Antonio River built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1991.

What condition is FM 536 over San Antonio River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does FM 536 over San Antonio River carry?

About 2,285 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is FM 536 over San Antonio River?

The structure is 432 ft (131.7 m) long with a longest span of 90 ft (27.4 m) and a deck 42 ft wide.

Who owns FM 536 over San Antonio River?

It is owned by the State Highway Agency.