NM-187 over Greenhorn Arroyo
PoorPosted for loadSierra County, New Mexico · 12.6 MI N of Dona Ana C/L · Structure no. 000000000001660
- Built
- 1928
- 97 years old
- Condition
- Poor
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 180 ft
- 7 main spans
- Daily traffic
- 297
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
NM-187 over Greenhorn Arroyo is a wood or timber stringer/multi-beam or girder carrying NM-187 over Greenhorn Arroyo in Sierra County, New Mexico. It was built in 1928, so it is 97 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 297 vehicles a day, roughly 11% of them trucks, projected to reach 403 by 2043. The structure is 180 ft (54.9 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NM-187 over Greenhorn Arroyo built?
It was built in 1928, making it 97 years old in 2025.
What condition is NM-187 over Greenhorn Arroyo in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.
How much traffic does NM-187 over Greenhorn Arroyo carry?
About 297 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is NM-187 over Greenhorn Arroyo?
The structure is 180 ft (54.9 m) long with a longest span of 25 ft (7.6 m) and a deck 30 ft wide.
Who owns NM-187 over Greenhorn Arroyo?
It is owned by the State Highway Agency.