US Bridges

L-00021 over I-10 Eb/Wb @ MP 20.8

Fair

Hidalgo County, New Mexico · 20.8 MI E of Ariz ST Line · Structure no. 000000000007387

Built
1974
51 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
241 ft
4 main spans
Daily traffic
1,636
2023 count
Owner
State
State Highway Agency

About this bridge

L-00021 over I-10 Eb/Wb @ MP 20.8 is a prestressed concrete stringer/multi-beam or girder carrying L-00021 over I-10 Eb/Wb @ MP 20.8 in Hidalgo County, New Mexico. It was built in 1974, so it is 51 years old, younger than the New Mexico average of 51.5 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 1,636 vehicles a day, roughly 17% of them trucks, projected to reach 2,224 by 2043. The structure is 241 ft (73.5 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesL-00021
CrossesI-10 Eb/Wb @ MP 20.8
Location20.8 MI E of Ariz ST Line
RouteState Highway 21
CountyHidalgo County
StateNew Mexico
Coordinates32.35273, -108.74058
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.4 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length241 ft (73.5 m)
Longest span95 ft (29 m)
Deck width41 ft (12.5 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,636 (2023)
Projected traffic2,224 by 2043
Trucks17%
Lanes on structure2
Traffic directionTwo-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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was L-00021 over I-10 Eb/Wb @ MP 20.8 built?

It was built in 1974, making it 51 years old in 2025.

What condition is L-00021 over I-10 Eb/Wb @ MP 20.8 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 March 2023.

How much traffic does L-00021 over I-10 Eb/Wb @ MP 20.8 carry?

About 1,636 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is L-00021 over I-10 Eb/Wb @ MP 20.8?

The structure is 241 ft (73.5 m) long with a longest span of 95 ft (29 m) and a deck 41 ft wide.

Who owns L-00021 over I-10 Eb/Wb @ MP 20.8?

It is owned by the State Highway Agency.