US Bridges

NM-516 over Unnamed Waterway

Fair

San Juan County, New Mexico · 4.0 MI N of Browing Prkwy · Structure no. 000000000003667

Built
1937
88 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
48 ft
5 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 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 22,275 vehicles a day, roughly 12% of them trucks, projected to reach 30,294 by 2043. The structure is 48 ft (14.5 m) long. If it were closed, the detour would be 28 mi (45 km).

Location

Open in Google Maps
CarriesNM-516
CrossesUnnamed Waterway
Location4.0 MI N of Browing Prkwy
RouteState Highway 516
CountySan Juan County
StateNew Mexico
Coordinates36.78175, -108.11812
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadHS 20
Structure length48 ft (14.5 m)
Longest span6 ft (1.8 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 closed28 mi (45 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$533,000 (2030 estimate)
NavigationNo navigation control on 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 March 2024.

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 48 ft (14.5 m) long with a longest span of 6 ft (1.8 m).

Who owns NM-516 over Unnamed Waterway?

It is owned by the State Highway Agency.