US 6 Ml over South Platte River
FairLogan County, Colorado · 12.7 MI SW of Sterling · Structure no. C-23-P
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 812 ft
- 12 main spans
- Daily traffic
- 1,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
US 6 Ml over South Platte River is a prestressed concrete stringer/multi-beam or girder carrying US 6 Ml over South Platte River in Logan County, Colorado. It was built in 1966, so it is 59 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 1,000 vehicles a day, roughly 17% of them trucks, projected to reach 1,250 by 2040. The structure is 812 ft (247.4 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 6 Ml over South Platte River built?
It was built in 1966, making it 59 years old in 2025.
What condition is US 6 Ml over South Platte 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 July 2023.
How much traffic does US 6 Ml over South Platte River carry?
About 1,000 vehicles per day (2020 count), of which roughly 17% are trucks.
How long is US 6 Ml over South Platte River?
The structure is 812 ft (247.4 m) long with a longest span of 68 ft (20.6 m) and a deck 35 ft wide.
Who owns US 6 Ml over South Platte River?
It is owned by the State Highway Agency.