US Bridges

FM 791 over IH 37

Fair

Atascosa County, Texas · 1.80 MI N of FM 1099 · Structure no. 150070007306169

Built
1976
49 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
320 ft
2 main spans
Daily traffic
2,370
2013 count
Owner
State
State Highway Agency

About this bridge

FM 791 over IH 37 is a prestressed concrete stringer/multi-beam or girder carrying FM 791 over IH 37 in Atascosa 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 fair condition with a lowest component rating of 5 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 2,370 vehicles a day, roughly 35% of them trucks, projected to reach 3,320 by 2033. The structure is 320 ft (97.5 m) long and 36 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesFM 791
CrossesIH 37
Location1.80 MI N of FM 1099
RouteState Highway 791
CountyAtascosa County
StateTexas
Coordinates28.75872, -98.29755
Functional classRural Major Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length320 ft (97.5 m)
Longest span115 ft (35.1 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,370 (2013)
Projected traffic3,320 by 2033
Trucks35%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was FM 791 over IH 37 built?

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

What condition is FM 791 over IH 37 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 May 2024.

How much traffic does FM 791 over IH 37 carry?

About 2,370 vehicles per day (2013 count), of which roughly 35% are trucks.

How long is FM 791 over IH 37?

The structure is 320 ft (97.5 m) long with a longest span of 115 ft (35.1 m) and a deck 36 ft wide.

Who owns FM 791 over IH 37?

It is owned by the State Highway Agency.