US Bridges

US-84 over Unnamed Waterway

Good

Rio Arriba County, New Mexico · 0.6 MI S of JCT US-285 · Structure no. 000000000006645

Built
1965
60 years old
Condition
Good
inspected August 2022
Type
Culvert
Concrete
Length
22 ft
3 main spans
Daily traffic
12,630
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 1965, so it is 60 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 12,630 vehicles a day, roughly 16% of them trucks, projected to reach 17,176 by 2043. The structure is 22 ft (6.6 m) long. If it were closed, the detour would be 19.9 mi (32 km).

CarriesUS-84
CrossesUnnamed Waterway
Location0.6 MI S of JCT US-285
RouteU.S. Route 84
Coordinates36.06387, -106.12052
Functional classUrban Other Principal 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 inspectionAugust 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating37.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length22 ft (6.6 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,630 (2023)
Projected traffic17,176 by 2043
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$80,000 (2030 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US-84 over Unnamed Waterway built?

It was built in 1965, making it 60 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 August 2022.

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

About 12,630 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is US-84 over Unnamed Waterway?

The structure is 22 ft (6.6 m) long with a longest span of 6 ft (1.8 m).

Who owns US-84 over Unnamed Waterway?

It is owned by the State Highway Agency.