US Bridges

IRR/NM-4 over Unnamed Waterway

Fair

Sandoval County, New Mexico · 3.1 M N of JCT NM-4/US550 · Structure no. 000000000005087

Built
1941
84 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
27 ft
4 main spans
Daily traffic
4,297
2023 count
Owner
State
State Highway Agency

About this bridge

IRR/NM-4 over Unnamed Waterway is a concrete culvert carrying IRR/NM-4 over Unnamed Waterway in Sandoval County, New Mexico. It was built in 1941, so it is 84 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 4,297 vehicles a day, roughly 11% of them trucks, projected to reach 5,843 by 2043. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesIRR/NM-4
CrossesUnnamed Waterway
Location3.1 M N of JCT NM-4/US550
RouteState Highway 4
CountySandoval County
StateNew Mexico
Coordinates35.58527, -106.74346
Functional classRural Minor 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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadH 15
Structure length27 ft (8.2 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,297 (2023)
Projected traffic5,843 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

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$62,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR/NM-4 over Unnamed Waterway built?

It was built in 1941, making it 84 years old in 2025.

What condition is IRR/NM-4 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/NM-4 over Unnamed Waterway carry?

About 4,297 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is IRR/NM-4 over Unnamed Waterway?

The structure is 27 ft (8.2 m) long with a longest span of 6 ft (1.8 m).

Who owns IRR/NM-4 over Unnamed Waterway?

It is owned by the State Highway Agency.