US Bridges

NM-516 over Unnamed Waterway

Fair

San Juan County, New Mexico · 5.0 MI N of Browing Prkwy · Structure no. 000000000003668

Built
1937
88 years old
Condition
Fair
inspected June 2021
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
22,275
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 1937, so it is 88 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 22,275 vehicles a day, roughly 12% of them trucks, projected to reach 30,294 by 2043. The structure is 21 ft (6.5 m) long. If it were closed, the detour would be 26.7 mi (43 km).

Location

Open in Google Maps
CarriesNM-516
CrossesUnnamed Waterway
Location5.0 MI N of Browing Prkwy
RouteState Highway 516
CountySan Juan County
StateNew Mexico
Coordinates36.79016, -108.10312
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.5 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 traffic22,275 (2023)
Projected traffic30,294 by 2043
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 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 proposedNone recorded
Estimated improvement cost$100,000 (2030 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NM-516 over Unnamed Waterway built?

It was built in 1937, making it 88 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 June 2021.

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

About 22,275 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is NM-516 over Unnamed Waterway?

The structure is 21 ft (6.5 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.