US Bridges

NM-423 over Rio Grande

Fair

Bernalillo County, New Mexico · 1.7 MI W of 2nd St/Albuq · Structure no. 000000000008666

Built
1987
38 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
1,406 ft
16 main spans
Daily traffic
86,760
2023 count
Owner
State
State Highway Agency

About this bridge

NM-423 over Rio Grande is a prestressed concrete continuous stringer/multi-beam or girder carrying NM-423 over Rio Grande in Bernalillo County, New Mexico. It was built in 1987, so it is 38 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 86,760 vehicles a day, roughly 13% of them trucks, projected to reach 117,993 by 2043. The structure is 1,406 ft (428.5 m) long and 113 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesNM-423
CrossesRio Grande
Location1.7 MI W of 2nd St/Albuq
RouteState Highway 423
Coordinates35.1822, -106.65159
Functional classUrban Other Principal Arterial

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans16
Design loadHS 20
Structure length1,406 ft (428.5 m)
Longest span88 ft (26.8 m)
Deck width113 ft (34.4 m)
Roadway width96 ft (29.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic86,760 (2023)
Projected traffic117,993 by 2043
Trucks13%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 NM-423 over Rio Grande built?

It was built in 1987, making it 38 years old in 2025.

What condition is NM-423 over Rio Grande 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 2023.

How much traffic does NM-423 over Rio Grande carry?

About 86,760 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is NM-423 over Rio Grande?

The structure is 1,406 ft (428.5 m) long with a longest span of 88 ft (26.8 m) and a deck 113 ft wide.

Who owns NM-423 over Rio Grande?

It is owned by the State Highway Agency.