SH 109 Ml over Mcmahon Arroyo
FairOtero County, Colorado · 8.5 Miles No of Bent-Oter · Structure no. M-23-I
- Built
- 1972
- 53 years old
- Condition
- Fair
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 94 ft
- 2 main spans
- Daily traffic
- 350
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
SH 109 Ml over Mcmahon Arroyo is a steel stringer/multi-beam or girder carrying SH 109 Ml over Mcmahon Arroyo in Otero County, Colorado. It was built in 1972, so it is 53 years old, older than the Colorado average of 42.2 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 350 vehicles a day, roughly 17% of them trucks, projected to reach 483 by 2040. The structure is 94 ft (28.7 m) long and 34 ft wide. If it were closed, the detour would be 62.1 mi (100 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SH 109 Ml over Mcmahon Arroyo built?
It was built in 1972, making it 53 years old in 2025.
What condition is SH 109 Ml over Mcmahon Arroyo 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 2024.
How much traffic does SH 109 Ml over Mcmahon Arroyo carry?
About 350 vehicles per day (2020 count), of which roughly 17% are trucks.
How long is SH 109 Ml over Mcmahon Arroyo?
The structure is 94 ft (28.7 m) long with a longest span of 45 ft (13.6 m) and a deck 34 ft wide.
Who owns SH 109 Ml over Mcmahon Arroyo?
It is owned by the State Highway Agency.