I-25 Sbl over Na CR 600 (blackmore)
FairNatrona County, Wyoming · Casper Marginal · Structure no. AHU
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected April 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 112 ft
- 3 main spans
- Daily traffic
- 6,490
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I-25 Sbl over Na CR 600 (blackmore) is a concrete continuous tee beam carrying I-25 Sbl over Na CR 600 (blackmore) in Natrona County, Wyoming. It was built in 1968, so it is 57 years old, older than the Wyoming average of 48.4 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 6,490 vehicles a day, roughly 16% of them trucks, projected to reach 9,086 by 2043. The structure is 112 ft (34.1 m) long and 41 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 | 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-25 Sbl over Na CR 600 (blackmore) built?
It was built in 1968, making it 57 years old in 2025.
What condition is I-25 Sbl over Na CR 600 (blackmore) 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 April 2024.
How much traffic does I-25 Sbl over Na CR 600 (blackmore) carry?
About 6,490 vehicles per day (2024 count), of which roughly 16% are trucks.
How long is I-25 Sbl over Na CR 600 (blackmore)?
The structure is 112 ft (34.1 m) long with a longest span of 43 ft (13.1 m) and a deck 41 ft wide.
Who owns I-25 Sbl over Na CR 600 (blackmore)?
It is owned by the State Highway Agency.