US Bridges

IRR/US-550 over Unnamed Waterway

Fair

Sandoval County, New Mexico · 11.75 MI NW of JCT I-25 · Structure no. 000000000007013

Built
1970
55 years old, rebuilt 1998
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
115 ft
5 main spans
Daily traffic
27,379
2023 count
Owner
State
State Highway Agency

About this bridge

IRR/US-550 over Unnamed Waterway is a concrete continuous slab carrying IRR/US-550 over Unnamed Waterway in Sandoval County, New Mexico. It was built in 1970 and reconstructed in 1998, so it is 55 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 6 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 27,379 vehicles a day, roughly 17% of them trucks, projected to reach 37,235 by 2043. The structure is 115 ft (35.1 m) long and 70 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesIRR/US-550
CrossesUnnamed Waterway
Location11.75 MI NW of JCT I-25
RouteU.S. Route 550
CountySandoval County
StateNew Mexico
Coordinates35.43494, -106.65676
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length115 ft (35.1 m)
Longest span25 ft (7.6 m)
Deck width70 ft (21.3 m)
Roadway width68 ft (20.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,379 (2023)
Projected traffic37,235 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
Strategic Highway NetworkNon-Interstate STRAHNET route

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$598,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR/US-550 over Unnamed Waterway built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1998.

What condition is IRR/US-550 over Unnamed Waterway 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 July 2024.

How much traffic does IRR/US-550 over Unnamed Waterway carry?

About 27,379 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is IRR/US-550 over Unnamed Waterway?

The structure is 115 ft (35.1 m) long with a longest span of 25 ft (7.6 m) and a deck 70 ft wide.

Who owns IRR/US-550 over Unnamed Waterway?

It is owned by the State Highway Agency.