US Bridges

NM-516 over Unnamed Waterway

Fair

San Juan County, New Mexico · 2.40 MI W of US-550 · Structure no. 000000000005866

Built
1958
67 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
19,496
2023 count
Owner
State
State Highway Agency

About this bridge

NM-516 over Unnamed Waterway is a concrete culvert carrying NM-516 over Unnamed Waterway in San Juan County, New Mexico. It was built in 1958, so it is 67 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 19,496 vehicles a day, roughly 12% of them trucks, projected to reach 26,514 by 2043. The structure is 31 ft (9.3 m) long. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesNM-516
CrossesUnnamed Waterway
Location2.40 MI W of US-550
RouteState Highway 516
CountySan Juan County
StateNew Mexico
Coordinates36.82407, -108.03802
Functional classUrban Other Principal 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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length31 ft (9.3 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,496 (2023)
Projected traffic26,514 by 2043
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemYes

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$470,000 (2030 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NM-516 over Unnamed Waterway built?

It was built in 1958, making it 67 years old in 2025.

What condition is NM-516 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 May 2023.

How much traffic does NM-516 over Unnamed Waterway carry?

About 19,496 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is NM-516 over Unnamed Waterway?

The structure is 31 ft (9.3 m) long with a longest span of 10 ft (3 m).

Who owns NM-516 over Unnamed Waterway?

It is owned by the State Highway Agency.