Keystone RD over Sny Magill
GoodClayton County, Iowa · 094032202 · Structure no. 000000000120262
- Built
- 2017
- 8 years old
- Condition
- Good
- inspected October 2024
- Type
- Slab
- Concrete Continuous
- Length
- 181 ft
- 4 main spans
- Daily traffic
- 62
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Keystone RD over Sny Magill is a concrete continuous slab carrying Keystone RD over Sny Magill in Clayton County, Iowa. It was built in 2017, so it is 8 years old, younger than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 62 vehicles a day, roughly 15% of them trucks, projected to reach 62 by 2044. The structure is 181 ft (55.2 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Keystone RD over Sny Magill built?
It was built in 2017, making it 8 years old in 2025.
What condition is Keystone RD over Sny Magill 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 October 2024.
How much traffic does Keystone RD over Sny Magill carry?
About 62 vehicles per day (2022 count), of which roughly 15% are trucks.
How long is Keystone RD over Sny Magill?
The structure is 181 ft (55.2 m) long with a longest span of 51 ft (15.5 m) and a deck 33 ft wide.
Who owns Keystone RD over Sny Magill?
It is owned by the County Highway Agency.