Irr# US 491 Ml over Mancos River
FairMontezuma County, Colorado · 2 MI North of New Mexico · Structure no. P-02-A
- Built
- 1959
- 66 years old
- Condition
- Fair
- inspected February 2025
- Type
- Tee Beam
- Concrete
- Length
- 124 ft
- 3 main spans
- Daily traffic
- 4,000
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
Irr# US 491 Ml over Mancos River is a concrete tee beam carrying Irr# US 491 Ml over Mancos River in Montezuma County, Colorado. It was built in 1959, so it is 66 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 4,000 vehicles a day, roughly 15% of them trucks, projected to reach 4,680 by 2038. The structure is 124 ft (37.8 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Irr# US 491 Ml over Mancos River built?
It was built in 1959, making it 66 years old in 2025.
What condition is Irr# US 491 Ml over Mancos River 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 February 2025.
How much traffic does Irr# US 491 Ml over Mancos River carry?
About 4,000 vehicles per day (2018 count), of which roughly 15% are trucks.
How long is Irr# US 491 Ml over Mancos River?
The structure is 124 ft (37.8 m) long with a longest span of 39 ft (12 m) and a deck 34 ft wide.
Who owns Irr# US 491 Ml over Mancos River?
It is owned by the State Highway Agency.