SH 145 Ml over San Miguel River
FairSan Miguel County, Colorado · 4.8 MI E. or Norwood · Structure no. L-04-A
- Built
- 1942
- 83 years old
- Condition
- Fair
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 121 ft
- 1 main span
- Daily traffic
- 1,800
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
SH 145 Ml over San Miguel River is a steel stringer/multi-beam or girder carrying SH 145 Ml over San Miguel River in San Miguel County, Colorado. It was built in 1942, so it is 83 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 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 1,800 vehicles a day, roughly 7% of them trucks, projected to reach 1,890 by 2040. The structure is 121 ft (36.9 m) long and 33 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SH 145 Ml over San Miguel River built?
It was built in 1942, making it 83 years old in 2025.
What condition is SH 145 Ml over San Miguel 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 December 2023.
How much traffic does SH 145 Ml over San Miguel River carry?
About 1,800 vehicles per day (2020 count), of which roughly 7% are trucks.
How long is SH 145 Ml over San Miguel River?
The structure is 121 ft (36.9 m) long with a longest span of 116 ft (35.4 m) and a deck 33 ft wide.
Who owns SH 145 Ml over San Miguel River?
It is owned by the State Highway Agency.