US Bridges

NM-386 over Unnamed Waterway

PoorPosted for load

San Miguel County, New Mexico · 5.0 MI W of JCT US-84 · Structure no. 000000000007662

Built
1976
49 years old
Condition
Poor
inspected April 2024
Type
Channel Beam
Concrete
Length
27 ft
1 main span
Daily traffic
238
2023 count
Owner
State
State Highway Agency

About this bridge

NM-386 over Unnamed Waterway is a concrete channel beam carrying NM-386 over Unnamed Waterway in San Miguel County, New Mexico. It was built in 1976, so it is 49 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 238 vehicles a day, roughly 11% of them trucks, projected to reach 323 by 2043. The structure is 27 ft (8.2 m) long and 36 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

CarriesNM-386
CrossesUnnamed Waterway
Location5.0 MI W of JCT US-84
RouteState Highway 386
Coordinates35.21398, -105.16975
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 18 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating19.4 US tons
Inventory rating11.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadH 10
Structure length27 ft (8.2 m)
Longest span25 ft (7.6 m)
Deck width36 ft (11 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic238 (2023)
Projected traffic323 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$310,000 (2030 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NM-386 over Unnamed Waterway built?

It was built in 1976, making it 49 years old in 2025.

What condition is NM-386 over Unnamed Waterway in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does NM-386 over Unnamed Waterway carry?

About 238 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-386 over Unnamed Waterway?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.6 m) and a deck 36 ft wide.

Who owns NM-386 over Unnamed Waterway?

It is owned by the State Highway Agency.