US Bridges

NM-185 over Unnamed Waterway

Fair

Dona Ana County, New Mexico · 0.7 M N of Radium Springs · Structure no. 000000000002966

Built
1932
93 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete
Length
117 ft
11 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 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 847 vehicles a day, roughly 11% of them trucks, projected to reach 1,151 by 2043. The structure is 117 ft (35.7 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNM-185
CrossesUnnamed Waterway
Location0.7 M N of Radium Springs
RouteState Highway 185
CountyDona Ana County
StateNew Mexico
Coordinates32.49807, -106.94196
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans11
Design loadH 15
Structure length117 ft (35.7 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 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$293,000
NavigationNot applicable (no 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 May 2024.

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 117 ft (35.7 m) long with a longest span of 10 ft (3 m).

Who owns NM-185 over Unnamed Waterway?

It is owned by the State Highway Agency.