Troy Mills RD over Wapsipinicon River
PoorLinn County, Iowa · 086070522 · Structure no. 000000000223180
- Built
- 1951
- 74 years old, rebuilt 1991
- Condition
- Poor
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 448 ft
- 4 main spans
- Daily traffic
- 2,033
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Troy Mills RD over Wapsipinicon River is a steel continuous stringer/multi-beam or girder carrying Troy Mills RD over Wapsipinicon River in Linn County, Iowa. It was built in 1951 and reconstructed in 1991, so it is 74 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.
It carries about 2,033 vehicles a day, roughly 13% of them trucks, projected to reach 2,033 by 2044. The structure is 448 ft (136.6 m) long and 32 ft wide. If it were closed, the detour would be 8.7 mi (14 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Troy Mills RD over Wapsipinicon River built?
It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1991.
What condition is Troy Mills RD over Wapsipinicon River 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 September 2024.
How much traffic does Troy Mills RD over Wapsipinicon River carry?
About 2,033 vehicles per day (2022 count), of which roughly 13% are trucks.
How long is Troy Mills RD over Wapsipinicon River?
The structure is 448 ft (136.6 m) long with a longest span of 125 ft (38.1 m) and a deck 32 ft wide.
Who owns Troy Mills RD over Wapsipinicon River?
It is owned by the County Highway Agency.