US Bridges

NM-1 over Matanza Arroyo

Fair

Socorro County, New Mexico · 0.6 M S Socorro City Lim. · Structure no. 000000000008324

Built
1981
44 years old
Condition
Fair
inspected September 2024
Type
Culvert
Steel
Length
41 ft
1 main span
Daily traffic
1,286
2023 count
Owner
State
State Highway Agency

About this bridge

NM-1 over Matanza Arroyo is a steel culvert carrying NM-1 over Matanza Arroyo in Socorro County, New Mexico. It was built in 1981, 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 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 1,286 vehicles a day, roughly 11% of them trucks, projected to reach 1,748 by 2043. The structure is 41 ft (12.5 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesNM-1
CrossesMatanza Arroyo
Location0.6 M S Socorro City Lim.
RouteState Highway 1
CountySocorro County
StateNew Mexico
Coordinates34.03238, -106.89443
Functional classRural Minor Collector

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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span41 ft (12.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,286 (2023)
Projected traffic1,748 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was NM-1 over Matanza Arroyo built?

It was built in 1981, making it 44 years old in 2025.

What condition is NM-1 over Matanza Arroyo 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 September 2024.

How much traffic does NM-1 over Matanza Arroyo carry?

About 1,286 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-1 over Matanza Arroyo?

The structure is 41 ft (12.5 m) long with a longest span of 41 ft (12.5 m).

Who owns NM-1 over Matanza Arroyo?

It is owned by the State Highway Agency.