Backbone ST Pk over Stream
FairDelaware County, Iowa · In Backbone State Park · Structure no. 000000000699020
- Built
- 1935
- 90 years old
- Condition
- Fair
- inspected May 2024
- Type
- Arch - Deck
- Concrete
- Length
- 31 ft
- 1 main span
- Daily traffic
- —
- 2022 count
- Owner
- State
- State Park, Forest, or Reservation Agency
About this bridge
Backbone ST Pk over Stream is a concrete arch - deck carrying Backbone ST Pk over Stream in Delaware County, Iowa. It was built in 1935, so it is 90 years old, older than the Iowa average of 45.5 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.
No traffic count is recorded. The structure is 31 ft (9.4 m) long and 23 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Backbone ST Pk over Stream built?
It was built in 1935, making it 90 years old in 2025.
What condition is Backbone ST Pk over Stream 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 May 2024.
How much traffic does Backbone ST Pk over Stream carry?
No traffic count is recorded for this structure.
How long is Backbone ST Pk over Stream?
The structure is 31 ft (9.4 m) long with a longest span of 26 ft (7.9 m) and a deck 23 ft wide.
Who owns Backbone ST Pk over Stream?
It is owned by the State Park, Forest, or Reservation Agency.