US Bridges

9th ST over San Antonio River

Fair

Bexar County, Texas · 0.08 MI N of Avenue B · Structure no. 150150B24660001

Built
1955
70 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
103 ft
3 main spans
Daily traffic
442
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

9th ST over San Antonio River is a concrete continuous slab carrying 9th ST over San Antonio River in Bexar County, Texas. It was built in 1955, so it is 70 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 442 vehicles a day, projected to reach 1,794 by 2042. The structure is 103 ft (31.4 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries9th ST
CrossesSan Antonio River
Location0.08 MI N of Avenue B
RouteCity Street 0
CountyBexar County
StateTexas
Coordinates29.43504, -98.48364
Functional classUrban Local

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length103 ft (31.4 m)
Longest span38 ft (11.6 m)
Deck width52 ft (15.7 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic442 (2020)
Projected traffic1,794 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$482,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 9th ST over San Antonio River built?

It was built in 1955, making it 70 years old in 2025.

What condition is 9th ST 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 August 2023.

How much traffic does 9th ST over San Antonio River carry?

About 442 vehicles per day (2020 count).

How long is 9th ST over San Antonio River?

The structure is 103 ft (31.4 m) long with a longest span of 38 ft (11.6 m) and a deck 52 ft wide.

Who owns 9th ST over San Antonio River?

It is owned by the City or Municipal Highway Agency.