US Bridges

US-84/285 over Arroyo Las Mascaras

Good

Santa Fe County, New Mexico · 0.1 MI N of W Alameda ST · Structure no. 000000000006550

Built
1964
61 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete
Length
77 ft
5 main spans
Daily traffic
29,043
2023 count
Owner
State
State Highway Agency

About this bridge

US-84/285 over Arroyo Las Mascaras is a concrete culvert carrying US-84/285 over Arroyo Las Mascaras in Santa Fe County, New Mexico. It was built in 1964, so it is 61 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 29,043 vehicles a day, roughly 12% of them trucks, projected to reach 39,498 by 2043. The structure is 77 ft (23.5 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS-84/285
CrossesArroyo Las Mascaras
Location0.1 MI N of W Alameda ST
RouteU.S. Route 84
Coordinates35.68976, -105.95392
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadHS 20
Structure length77 ft (23.5 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,043 (2023)
Projected traffic39,498 by 2043
Trucks12%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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$754,000 (2030 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US-84/285 over Arroyo Las Mascaras built?

It was built in 1964, making it 61 years old in 2025.

What condition is US-84/285 over Arroyo Las Mascaras 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 October 2024.

How much traffic does US-84/285 over Arroyo Las Mascaras carry?

About 29,043 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is US-84/285 over Arroyo Las Mascaras?

The structure is 77 ft (23.5 m) long with a longest span of 10 ft (3 m).

Who owns US-84/285 over Arroyo Las Mascaras?

It is owned by the State Highway Agency.