US Bridges

NM-185 over Unnamed Waterway

Fair

Dona Ana County, New Mexico · 6.7 MI N of JCT NM-157 · Structure no. 000000000002965

Built
1932
93 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
26 ft
4 main spans
Daily traffic
847
2023 count
Owner
State
State Highway Agency

About this bridge

NM-185 over Unnamed Waterway is a concrete culvert carrying NM-185 over Unnamed Waterway in Dona Ana County, New Mexico. It was built in 1932, so it is 93 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 847 vehicles a day, roughly 11% of them trucks, projected to reach 1,151 by 2043. The structure is 26 ft (7.8 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNM-185
CrossesUnnamed Waterway
Location6.7 MI N of JCT NM-157
RouteState Highway 185
Coordinates32.54003, -106.99395
Functional classRural Major Collector

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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadH 15
Structure length26 ft (7.8 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 traffic847 (2023)
Projected traffic1,151 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
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-185 over Unnamed Waterway built?

It was built in 1932, making it 93 years old in 2025.

What condition is NM-185 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 2023.

How much traffic does NM-185 over Unnamed Waterway carry?

About 847 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-185 over Unnamed Waterway?

The structure is 26 ft (7.8 m) long with a longest span of 6 ft (1.8 m).

Who owns NM-185 over Unnamed Waterway?

It is owned by the State Highway Agency.