US Bridges

IRR/US-550 over Canyon Largo

Good

Sandoval County, New Mexico · 21.1 MI NW of JCT NM-126 · Structure no. 000000000007782

Built
1978
47 years old, rebuilt 2001
Condition
Good
inspected October 2023
Type
Slab
Concrete Continuous
Length
168 ft
6 main spans
Daily traffic
5,662
2023 count
Owner
State
State Highway Agency

About this bridge

IRR/US-550 over Canyon Largo is a concrete continuous slab carrying IRR/US-550 over Canyon Largo in Sandoval County, New Mexico. It was built in 1978 and reconstructed in 2001, so it is 47 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 5,662 vehicles a day, roughly 35% of them trucks, projected to reach 7,700 by 2043. The structure is 168 ft (51.1 m) long and 99 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesIRR/US-550
CrossesCanyon Largo
Location21.1 MI NW of JCT NM-126
RouteU.S. Route 550
CountySandoval County
StateNew Mexico
Coordinates36.14606, -107.26289
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.4 US tons
Inventory rating29 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length168 ft (51.1 m)
Longest span30 ft (9 m)
Deck width99 ft (30.2 m)
Roadway width96 ft (29.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,662 (2023)
Projected traffic7,700 by 2043
Trucks35%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$655,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR/US-550 over Canyon Largo built?

It was built in 1978, making it 47 years old in 2025. It was reconstructed in 2001.

What condition is IRR/US-550 over Canyon Largo 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 2023.

How much traffic does IRR/US-550 over Canyon Largo carry?

About 5,662 vehicles per day (2023 count), of which roughly 35% are trucks.

How long is IRR/US-550 over Canyon Largo?

The structure is 168 ft (51.1 m) long with a longest span of 30 ft (9 m) and a deck 99 ft wide.

Who owns IRR/US-550 over Canyon Largo?

It is owned by the State Highway Agency.