US Bridges

US-84/285 Nbl over Arroyo Chamisos

Fair

Santa Fe County, New Mexico · 1.06 MI N of JCT I-25 · Structure no. 000000000007334

Built
1973
52 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
42,473
2023 count
Owner
State
State Highway Agency

About this bridge

US-84/285 Nbl over Arroyo Chamisos is a concrete continuous slab carrying US-84/285 Nbl over Arroyo Chamisos in Santa Fe County, New Mexico. It was built in 1973, so it is 52 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 fair condition with a lowest component rating of 5 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 42,473 vehicles a day, roughly 12% of them trucks, projected to reach 57,763 by 2043. The structure is 100 ft (30.4 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS-84/285 Nbl
CrossesArroyo Chamisos
Location1.06 MI N of JCT I-25
RouteU.S. Route 84
Coordinates35.6496, -105.95636
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.2 US tons
Inventory rating28.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length100 ft (30.4 m)
Longest span38 ft (11.6 m)
Deck width46 ft (14 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,473 (2023)
Projected traffic57,763 by 2043
Trucks12%
Lanes on structure3
Traffic directionOne-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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US-84/285 Nbl over Arroyo Chamisos built?

It was built in 1973, making it 52 years old in 2025.

What condition is US-84/285 Nbl over Arroyo Chamisos 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 June 2024.

How much traffic does US-84/285 Nbl over Arroyo Chamisos carry?

About 42,473 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is US-84/285 Nbl over Arroyo Chamisos?

The structure is 100 ft (30.4 m) long with a longest span of 38 ft (11.6 m) and a deck 46 ft wide.

Who owns US-84/285 Nbl over Arroyo Chamisos?

It is owned by the State Highway Agency.