US Bridges

US-84 over LA Madera Arroyo

Fair

Rio Arriba County, New Mexico · 9.0 MI N of JCT US-285 · Structure no. 000000000007313

Built
1976
49 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
125 ft
2 main spans
Daily traffic
5,440
2023 count
Owner
State
State Highway Agency

About this bridge

US-84 over LA Madera Arroyo is a prestressed concrete stringer/multi-beam or girder carrying US-84 over LA Madera Arroyo in Rio Arriba County, New Mexico. It was built in 1976, so it is 49 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 5,440 vehicles a day, roughly 11% of them trucks, projected to reach 7,398 by 2043. The structure is 125 ft (38.1 m) long and 51 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesUS-84
CrossesLA Madera Arroyo
Location9.0 MI N of JCT US-285
RouteU.S. Route 84
CountyRio Arriba County
StateNew Mexico
Coordinates36.17718, -106.21242
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length125 ft (38.1 m)
Longest span73 ft (22.3 m)
Deck width51 ft (15.5 m)
Roadway width48 ft (14.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,440 (2023)
Projected traffic7,398 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$459,000 (2030 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US-84 over LA Madera Arroyo built?

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

What condition is US-84 over LA Madera Arroyo 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 August 2023.

How much traffic does US-84 over LA Madera Arroyo carry?

About 5,440 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is US-84 over LA Madera Arroyo?

The structure is 125 ft (38.1 m) long with a longest span of 73 ft (22.3 m) and a deck 51 ft wide.

Who owns US-84 over LA Madera Arroyo?

It is owned by the State Highway Agency.