US Bridges

NM-47 over Abo Arroyo

Fair

Socorro County, New Mexico · 2.1 MI N US-60/NM-47 · Structure no. 000000000007476

Built
1974
51 years old
Condition
Fair
inspected February 2025
Type
Slab
Concrete Continuous
Length
177 ft
5 main spans
Daily traffic
1,260
2023 count
Owner
State
State Highway Agency

About this bridge

NM-47 over Abo Arroyo is a concrete continuous slab carrying NM-47 over Abo Arroyo in Socorro County, New Mexico. It was built in 1974, so it is 51 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 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 1,260 vehicles a day, roughly 11% of them trucks, projected to reach 1,713 by 2043. The structure is 177 ft (53.9 m) long and 43 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

Open in Google Maps
CarriesNM-47
CrossesAbo Arroyo
Location2.1 MI N US-60/NM-47
RouteState Highway 47
CountySocorro County
StateNew Mexico
Coordinates34.45946, -106.54954
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length177 ft (53.9 m)
Longest span38 ft (11.6 m)
Deck width43 ft (13.1 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,260 (2023)
Projected traffic1,713 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 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$525,000 (2030 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NM-47 over Abo Arroyo built?

It was built in 1974, making it 51 years old in 2025.

What condition is NM-47 over Abo 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 February 2025.

How much traffic does NM-47 over Abo Arroyo carry?

About 1,260 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-47 over Abo Arroyo?

The structure is 177 ft (53.9 m) long with a longest span of 38 ft (11.6 m) and a deck 43 ft wide.

Who owns NM-47 over Abo Arroyo?

It is owned by the State Highway Agency.