Logan Mill Road over Four Mile Creek
FairBoulder County, Colorado · 20 Ft W of Four MI Cny DR · Structure no. BC-118S-0.0-FM
- Built
- 2019
- 6 years old
- Condition
- Fair
- inspected February 2025
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 63 ft
- 1 main span
- Daily traffic
- 238
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Logan Mill Road over Four Mile Creek is a prestressed concrete box beam or girders - multiple carrying Logan Mill Road over Four Mile Creek in Boulder County, Colorado. It was built in 2019, so it is 6 years old, younger 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 238 vehicles a day, roughly 18% of them trucks, projected to reach 286 by 2043. The structure is 63 ft (19.1 m) long and 30 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 8 Very Good | No problems noted. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Logan Mill Road over Four Mile Creek built?
It was built in 2019, making it 6 years old in 2025.
What condition is Logan Mill Road over Four Mile Creek 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 Logan Mill Road over Four Mile Creek carry?
About 238 vehicles per day (2023 count), of which roughly 18% are trucks.
How long is Logan Mill Road over Four Mile Creek?
The structure is 63 ft (19.1 m) long with a longest span of 58 ft (17.6 m) and a deck 30 ft wide.
Who owns Logan Mill Road over Four Mile Creek?
It is owned by the County Highway Agency.