Twenty Mile Road over Sulphur Gulch | Sulphur
FairDouglas County, Colorado · Just South of Main Street · Structure no. PAR TWENTY-0.1
- Built
- 2000
- 25 years old
- Condition
- Fair
- inspected February 2025
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 230 ft
- 2 main spans
- Daily traffic
- 12,682
- 2021 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
Twenty Mile Road over Sulphur Gulch | Sulphur is a prestressed concrete continuous stringer/multi-beam or girder carrying Twenty Mile Road over Sulphur Gulch | Sulphur in Douglas County, Colorado. It was built in 2000, so it is 25 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 12,682 vehicles a day, roughly 4% of them trucks, projected to reach 16,994 by 2041. The structure is 230 ft (70.2 m) long and 92 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 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 Twenty Mile Road over Sulphur Gulch | Sulphur built?
It was built in 2000, making it 25 years old in 2025.
What condition is Twenty Mile Road over Sulphur Gulch | Sulphur 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 Twenty Mile Road over Sulphur Gulch | Sulphur carry?
About 12,682 vehicles per day (2021 count), of which roughly 4% are trucks.
How long is Twenty Mile Road over Sulphur Gulch | Sulphur?
The structure is 230 ft (70.2 m) long with a longest span of 111 ft (33.9 m) and a deck 92 ft wide.
Who owns Twenty Mile Road over Sulphur Gulch | Sulphur?
It is owned by the Town or Township Highway Agency.