Harts Mill RD over Mill Creek
PoorClinton County, Iowa · 081061101 · Structure no. 000000000002120
- Built
- 1970
- 55 years old, rebuilt 1985
- Condition
- Poor
- inspected May 2024
- Type
- Slab
- Concrete Continuous
- Length
- 173 ft
- 3 main spans
- Daily traffic
- 1,410
- 2022 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Harts Mill RD over Mill Creek is a concrete continuous slab carrying Harts Mill RD over Mill Creek in Clinton County, Iowa. It was built in 1970 and reconstructed in 1985, so it is 55 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 1,410 vehicles a day, projected to reach 1,410 by 2044. The structure is 173 ft (52.7 m) long and 44 ft wide. If it were closed, the detour would be 5 mi (8 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Harts Mill RD over Mill Creek built?
It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1985.
What condition is Harts Mill RD over Mill 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 Harts Mill RD over Mill Creek carry?
About 1,410 vehicles per day (2022 count).
How long is Harts Mill RD over Mill Creek?
The structure is 173 ft (52.7 m) long with a longest span of 65 ft (19.8 m) and a deck 44 ft wide.
Who owns Harts Mill RD over Mill Creek?
It is owned by the City or Municipal Highway Agency.