640th Ave over Calamus Creek
PoorPosted for loadStory County, Iowa · 082222804 · Structure no. 000000000313890
- Built
- 1938
- 87 years old, rebuilt 1987
- Condition
- Poor
- inspected January 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 64 ft
- 2 main spans
- Daily traffic
- 45
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
640th Ave over Calamus Creek is a steel stringer/multi-beam or girder carrying 640th Ave over Calamus Creek in Story County, Iowa. It was built in 1938 and reconstructed in 1987, so it is 87 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 45 vehicles a day, projected to reach 45 by 2043. The structure is 64 ft (19.5 m) long and 25 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 640th Ave over Calamus Creek built?
It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1987.
What condition is 640th Ave over Calamus 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 January 2023.
How much traffic does 640th Ave over Calamus Creek carry?
About 45 vehicles per day (2022 count).
How long is 640th Ave over Calamus Creek?
The structure is 64 ft (19.5 m) long with a longest span of 31 ft (9.4 m) and a deck 25 ft wide.
Who owns 640th Ave over Calamus Creek?
It is owned by the County Highway Agency.