US Bridges

Loop 20 over Rio Grande River

Fair

Webb County, Texas · 2.68 MI W of IH35 · Structure no. 222400B01376001

Built
2000
25 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
977 ft
10 main spans
Daily traffic
13,500
2014 count
Owner
City
City or Municipal Highway Agency

About this bridge

Loop 20 over Rio Grande River is a prestressed concrete stringer/multi-beam or girder carrying Loop 20 over Rio Grande River in Webb County, Texas. It was built in 2000, so it is 25 years old, younger 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 13,500 vehicles a day, roughly 99% of them trucks, projected to reach 26,500 by 2034. The structure is 977 ft (297.8 m) long and 120 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesLoop 20
CrossesRio Grande River
Location2.68 MI W of IH35
CountyWebb County
StateTexas
Coordinates27.5978, -99.53556
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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans10
Design loadHS 20
Structure length977 ft (297.8 m)
Longest span98 ft (29.9 m)
Deck width120 ft (36.6 m)
Roadway width100 ft (30.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,500 (2014)
Projected traffic26,500 by 2034
Trucks99%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 km)
TollToll bridge
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Loop 20 over Rio Grande River built?

It was built in 2000, making it 25 years old in 2025.

What condition is Loop 20 over Rio Grande 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 October 2023.

How much traffic does Loop 20 over Rio Grande River carry?

About 13,500 vehicles per day (2014 count), of which roughly 99% are trucks.

How long is Loop 20 over Rio Grande River?

The structure is 977 ft (297.8 m) long with a longest span of 98 ft (29.9 m) and a deck 120 ft wide.

Who owns Loop 20 over Rio Grande River?

It is owned by the City or Municipal Highway Agency.