US Bridges

FM 493 over Rio Grande River

Good

Hidalgo County, Texas · Donna International Bridg · Structure no. 211090C00170001

Built
2011
14 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,000 ft
10 main spans
Daily traffic
2,340
2011 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

FM 493 over Rio Grande River is a prestressed concrete stringer/multi-beam or girder carrying FM 493 over Rio Grande River in Hidalgo County, Texas. It was built in 2011, so it is 14 years old, younger 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 2,340 vehicles a day, roughly 12% of them trucks, projected to reach 3,250 by 2030. The structure is 1,000 ft (304.8 m) long and 109 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesFM 493
CrossesRio Grande River
LocationDonna International Bridg
StateTexas
Coordinates26.06589, -98.07487
Functional classRural Local

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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to 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 spans10
Design loadHS 20
Structure length1,000 ft (304.8 m)
Longest span110 ft (33.5 m)
Deck width109 ft (33.1 m)
Roadway width100 ft (30.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,340 (2011)
Projected traffic3,250 by 2030
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollToll bridge
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 493 over Rio Grande River built?

It was built in 2011, making it 14 years old in 2025.

What condition is FM 493 over Rio Grande 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 November 2023.

How much traffic does FM 493 over Rio Grande River carry?

About 2,340 vehicles per day (2011 count), of which roughly 12% are trucks.

How long is FM 493 over Rio Grande River?

The structure is 1,000 ft (304.8 m) long with a longest span of 110 ft (33.5 m) and a deck 109 ft wide.

Who owns FM 493 over Rio Grande River?

It is owned by the Town or Township Highway Agency.