US Bridges

US-84 over Unnamed Waterway

Good

Rio Arriba County, New Mexico · 7.30 MI N NM-554 /El Rito · Structure no. 000000000003647

Built
1940
85 years old, rebuilt 1993
Condition
Good
inspected August 2021
Type
Culvert
Concrete
Length
31 ft
4 main spans
Daily traffic
3,501
2023 count
Owner
State
State Highway Agency

About this bridge

US-84 over Unnamed Waterway is a concrete culvert carrying US-84 over Unnamed Waterway in Rio Arriba County, New Mexico. It was built in 1940 and reconstructed in 1993, so it is 85 years old, older 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 31 ft (9.4 m) long. If it were closed, the detour would be 98.8 mi (159 km).

CarriesUS-84
CrossesUnnamed Waterway
Location7.30 MI N NM-554 /El Rito
RouteU.S. Route 84
Coordinates36.22961, -106.3772
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadH 15
Structure length31 ft (9.4 m)
Longest span7 ft (2.1 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 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$138,000 (2030 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US-84 over Unnamed Waterway built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1993.

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 August 2021.

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 31 ft (9.4 m) long with a longest span of 7 ft (2.1 m).

Who owns US-84 over Unnamed Waterway?

It is owned by the State Highway Agency.