S 59 over Mizpah Creek
GoodPowder River County, Montana · 9M NW Broadus · Structure no. P00023069+07971
- Built
- 2001
- 24 years old
- Condition
- Good
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 91 ft
- 1 main span
- Daily traffic
- 742
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 59 over Mizpah Creek is a prestressed concrete stringer/multi-beam or girder carrying S 59 over Mizpah Creek in Powder River County, Montana. It was built in 2001, so it is 24 years old, younger than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 742 vehicles a day, roughly 15% of them trucks, projected to reach 779 by 2043. The structure is 91 ft (27.8 m) long and 38 ft wide. If it were closed, the detour would be 85.1 mi (137 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| 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 S 59 over Mizpah Creek built?
It was built in 2001, making it 24 years old in 2025.
What condition is S 59 over Mizpah Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.
How much traffic does S 59 over Mizpah Creek carry?
About 742 vehicles per day (2023 count), of which roughly 15% are trucks.
How long is S 59 over Mizpah Creek?
The structure is 91 ft (27.8 m) long with a longest span of 89 ft (27 m) and a deck 38 ft wide.
Who owns S 59 over Mizpah Creek?
It is owned by the State Highway Agency.