US Bridges

IRR/US-550 over Canyon Largo

Good

Sandoval County, New Mexico · 26.5 MI NW of JCT NM-126 · Structure no. 000000000008234

Built
1981
44 years old, rebuilt 2001
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
168 ft
2 main spans
Daily traffic
5,139
2023 count
Owner
State
State Highway Agency

About this bridge

IRR/US-550 over Canyon Largo is a prestressed concrete continuous stringer/multi-beam or girder carrying IRR/US-550 over Canyon Largo in Sandoval County, New Mexico. It was built in 1981 and reconstructed in 2001, so it is 44 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 5,139 vehicles a day, roughly 17% of them trucks, projected to reach 6,989 by 2043. The structure is 168 ft (51.3 m) long and 73 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
Location26.5 MI NW of JCT NM-126
RouteU.S. Route 550
CountySandoval County
StateNew Mexico
Coordinates36.18171, -107.34878
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.
Superstructure8 Very GoodNo problems noted.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating22.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length168 ft (51.3 m)
Longest span82 ft (24.9 m)
Deck width73 ft (22.3 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,139 (2023)
Projected traffic6,989 by 2043
Trucks17%
Lanes on structure4
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$637,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

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

It was built in 1981, making it 44 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 5,139 vehicles per day (2023 count), of which roughly 17% are trucks.

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

The structure is 168 ft (51.3 m) long with a longest span of 82 ft (24.9 m) and a deck 73 ft wide.

Who owns IRR/US-550 over Canyon Largo?

It is owned by the State Highway Agency.