US Bridges

US 281 SB over N ST Marys ST

Good

Bexar County, Texas · 0.95 MI S of Hildebrand · Structure no. 150150007308121

Built
1976
49 years old
Condition
Good
inspected August 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
280 ft
4 main spans
Daily traffic
77,970
2013 count
Owner
State
State Highway Agency

About this bridge

US 281 SB over N ST Marys ST is a prestressed concrete stringer/multi-beam or girder carrying US 281 SB over N ST Marys ST in Bexar County, Texas. It was built in 1976, so it is 49 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 77,970 vehicles a day, roughly 4% of them trucks, projected to reach 109,160 by 2033. The structure is 280 ft (85.3 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 281 SB
CrossesN ST Marys ST
Location0.95 MI S of Hildebrand
RouteU.S. Route 281
StateTexas
Coordinates29.45471, -98.482
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum 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 spans4
Design loadHS 20
Structure length280 ft (85.3 m)
Longest span75 ft (22.9 m)
Deck width58 ft (17.6 m)
Roadway width57 ft (17.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic77,970 (2013)
Projected traffic109,160 by 2033
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 281 SB over N ST Marys ST built?

It was built in 1976, making it 49 years old in 2025.

What condition is US 281 SB over N ST Marys ST 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 August 2022.

How much traffic does US 281 SB over N ST Marys ST carry?

About 77,970 vehicles per day (2013 count), of which roughly 4% are trucks.

How long is US 281 SB over N ST Marys ST?

The structure is 280 ft (85.3 m) long with a longest span of 75 ft (22.9 m) and a deck 58 ft wide.

Who owns US 281 SB over N ST Marys ST?

It is owned by the State Highway Agency.