SW 520th ST over Deer Creek
PoorPosted for loadJohnson County, Iowa · 078082001 · Structure no. 000000000203770
- Built
- 1900
- 125 years old, rebuilt 1989
- Condition
- Poor
- inspected May 2024
- Type
- Truss - Thru
- Steel
- Length
- 62 ft
- 1 main span
- Daily traffic
- 35
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
SW 520th ST over Deer Creek is a steel truss - thru carrying SW 520th ST over Deer Creek in Johnson County, Iowa. It was built in 1900 and reconstructed in 1989, so it is 125 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 35 vehicles a day, projected to reach 35 by 2044. The structure is 62 ft (18.9 m) long and 16 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SW 520th ST over Deer Creek built?
It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1989.
What condition is SW 520th ST over Deer Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.
How much traffic does SW 520th ST over Deer Creek carry?
About 35 vehicles per day (2021 count).
How long is SW 520th ST over Deer Creek?
The structure is 62 ft (18.9 m) long with a longest span of 60 ft (18.3 m) and a deck 16 ft wide.
Who owns SW 520th ST over Deer Creek?
It is owned by the County Highway Agency.