100th ST over Small Stream
PoorPosted for loadStory County, Iowa · 085230101 · Structure no. 000000000316070
- Built
- 1917
- 108 years old
- Condition
- Poor
- inspected November 2022
- Type
- Stringer/Multi-beam or Girder
- Concrete
- Length
- 28 ft
- 1 main span
- Daily traffic
- 30
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
100th ST over Small Stream is a concrete stringer/multi-beam or girder carrying 100th ST over Small Stream in Story County, Iowa. It was built in 1917, so it is 108 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 other load-capacity restriction.
It carries about 30 vehicles a day, projected to reach 30 by 2043. The structure is 28 ft (8.5 m) long and 20 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, 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 100th ST over Small Stream built?
It was built in 1917, making it 108 years old in 2025.
What condition is 100th ST over Small Stream 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 November 2022.
How much traffic does 100th ST over Small Stream carry?
About 30 vehicles per day (2022 count).
How long is 100th ST over Small Stream?
The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 20 ft wide.
Who owns 100th ST over Small Stream?
It is owned by the County Highway Agency.