US Bridges

CR 326 over San Antonio River

PoorPosted for load

Karnes County, Texas · 4.4 MI W of CR 336 · Structure no. 161290AA0326003

Built
1973
52 years old
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
408 ft
1 main span
Daily traffic
100
2016 count
Owner
County
County Highway Agency

About this bridge

CR 326 over San Antonio River is a prestressed concrete stringer/multi-beam or girder carrying CR 326 over San Antonio River in Karnes County, Texas. It was built in 1973, so it is 52 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, projected to reach 75 by 2035. The structure is 408 ft (124.4 m) long and 28 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesCR 326
CrossesSan Antonio River
Location4.4 MI W of CR 336
RouteCounty Highway 326
CountyKarnes County
StateTexas
Coordinates28.88743, -97.78673
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+8 approach)
Design loadUnknown
Structure length408 ft (124.4 m)
Longest span85 ft (25.9 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2016)
Projected traffic75 by 2035
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$762,000
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 326 over San Antonio River built?

It was built in 1973, making it 52 years old in 2025.

What condition is CR 326 over San Antonio River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does CR 326 over San Antonio River carry?

About 100 vehicles per day (2016 count).

How long is CR 326 over San Antonio River?

The structure is 408 ft (124.4 m) long with a longest span of 85 ft (25.9 m) and a deck 28 ft wide.

Who owns CR 326 over San Antonio River?

It is owned by the County Highway Agency.