31-MC23 over Unnamed Waterway
PoorPosted for loadMcKinley County, New Mexico · 4.0 MI W NM-605 @ MP-10.6 · Structure no. 000000000008179
- Built
- 1975
- 50 years old
- Condition
- Poor
- inspected March 2024
- Type
- Truss - Thru
- Aluminum, Wrought Iron, or Cast Iron
- Length
- 183 ft
- 3 main spans
- Daily traffic
- 504
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
31-MC23 over Unnamed Waterway is a aluminum, wrought iron, or cast iron truss - thru carrying 31-MC23 over Unnamed Waterway in McKinley County, New Mexico. It was built in 1975, so it is 50 years old, younger 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 3 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 504 vehicles a day, roughly 12% of them trucks, projected to reach 685 by 2043. The structure is 183 ft (55.8 m) long and 17 ft wide. If it were closed, the detour would be 39.8 mi (64 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 31-MC23 over Unnamed Waterway built?
It was built in 1975, making it 50 years old in 2025.
What condition is 31-MC23 over Unnamed Waterway 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 March 2024.
How much traffic does 31-MC23 over Unnamed Waterway carry?
About 504 vehicles per day (2023 count), of which roughly 12% are trucks.
How long is 31-MC23 over Unnamed Waterway?
The structure is 183 ft (55.8 m) long with a longest span of 99 ft (30.2 m) and a deck 17 ft wide.
Who owns 31-MC23 over Unnamed Waterway?
It is owned by the County Highway Agency.