US Bridges

US-84 over Unnamed Waterway

Good

Rio Arriba County, New Mexico · 1.47 MI N of JCT NM-554 · Structure no. 000000000008736

Built
1989
36 years old
Condition
Good
inspected June 2024
Type
Culvert
Steel
Length
104 ft
8 main spans
Daily traffic
3,501
2023 count
Owner
State
State Highway Agency

About this bridge

US-84 over Unnamed Waterway is a steel culvert carrying US-84 over Unnamed Waterway in Rio Arriba County, New Mexico. It was built in 1989, so it is 36 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 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 3,501 vehicles a day, roughly 11% of them trucks, projected to reach 4,761 by 2043. The structure is 104 ft (31.7 m) long. If it were closed, the detour would be 67.7 mi (109 km).

CarriesUS-84
CrossesUnnamed Waterway
Location1.47 MI N of JCT NM-554
RouteU.S. Route 84
Coordinates36.21324, -106.27917
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans8
Design loadHS 20
Structure length104 ft (31.7 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,501 (2023)
Projected traffic4,761 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed67.7 mi (109 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 proposedNone recorded
Estimated improvement cost$5 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US-84 over Unnamed Waterway built?

It was built in 1989, making it 36 years old in 2025.

What condition is US-84 over Unnamed Waterway 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 June 2024.

How much traffic does US-84 over Unnamed Waterway carry?

About 3,501 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is US-84 over Unnamed Waterway?

The structure is 104 ft (31.7 m) long with a longest span of 9 ft (2.7 m).

Who owns US-84 over Unnamed Waterway?

It is owned by the State Highway Agency.