State Highway 200 over Garrison Dam Spillway
GoodMcLean County, North Dakota · 1 Mile SW of Riverdale · Structure no. 200-178-423
- Built
- 1955
- 70 years old
- Condition
- Good
- inspected September 2024
- Type
- Girder and Floorbeam System
- Prestressed Concrete
- Length
- 1,575 ft
- 32 main spans
- Daily traffic
- 995
- 2019 count
- Owner
- Federal
- Corps of Engineers (Civil)
About this bridge
State Highway 200 over Garrison Dam Spillway is a prestressed concrete girder and floorbeam system carrying State Highway 200 over Garrison Dam Spillway in McLean County, North Dakota. It was built in 1955, so it is 70 years old, older than the North Dakota average of 48.2 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 995 vehicles a day, roughly 20% of them trucks, projected to reach 1,260 by 2042. The structure is 1,575 ft (480 m) long and 36 ft wide. If it were closed, the detour would be 69 mi (111 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Highway 200 over Garrison Dam Spillway built?
It was built in 1955, making it 70 years old in 2025.
What condition is State Highway 200 over Garrison Dam Spillway 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 2024.
How much traffic does State Highway 200 over Garrison Dam Spillway carry?
About 995 vehicles per day (2019 count), of which roughly 20% are trucks.
How long is State Highway 200 over Garrison Dam Spillway?
The structure is 1,575 ft (480 m) long with a longest span of 44 ft (13.3 m) and a deck 36 ft wide.
Who owns State Highway 200 over Garrison Dam Spillway?
It is owned by the Corps of Engineers (Civil).