US Bridges

NM-68 over Unnamed Waterway

Good

Rio Arriba County, New Mexico · 3.50 MI N of JCT US-84 · Structure no. 000000000003615

Built
1925
100 years old, rebuilt 1996
Condition
Good
inspected March 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
16,131
2023 count
Owner
State
State Highway Agency

About this bridge

NM-68 over Unnamed Waterway is a concrete culvert carrying NM-68 over Unnamed Waterway in Rio Arriba County, New Mexico. It was built in 1925 and reconstructed in 1996, so it is 100 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 16,131 vehicles a day, roughly 12% of them trucks, projected to reach 21,938 by 2043. The structure is 21 ft (6.3 m) long.

CarriesNM-68
CrossesUnnamed Waterway
Location3.50 MI N of JCT US-84
RouteState Highway 68
Coordinates36.03982, -106.06225
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection9 ExcellentNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating28.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length21 ft (6.3 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 traffic16,131 (2023)
Projected traffic21,938 by 2043
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was NM-68 over Unnamed Waterway built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1996.

What condition is NM-68 over Unnamed Waterway in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does NM-68 over Unnamed Waterway carry?

About 16,131 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is NM-68 over Unnamed Waterway?

The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3 m).

Who owns NM-68 over Unnamed Waterway?

It is owned by the State Highway Agency.