C70 330th ST over Boone River
PoorWright County, Iowa · 090263601 · Structure no. 000000000054520
- Built
- 1951
- 74 years old
- Condition
- Poor
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 242 ft
- 3 main spans
- Daily traffic
- 977
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
C70 330th ST over Boone River is a steel continuous stringer/multi-beam or girder carrying C70 330th ST over Boone River in Wright County, Iowa. It was built in 1951, 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 3 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 977 vehicles a day, roughly 25% of them trucks, projected to reach 977 by 2044. The structure is 242 ft (73.8 m) long and 29 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, 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 C70 330th ST over Boone River built?
It was built in 1951, making it 74 years old in 2025.
What condition is C70 330th ST over Boone 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 March 2024.
How much traffic does C70 330th ST over Boone River carry?
About 977 vehicles per day (2022 count), of which roughly 25% are trucks.
How long is C70 330th ST over Boone River?
The structure is 242 ft (73.8 m) long with a longest span of 94 ft (28.7 m) and a deck 29 ft wide.
Who owns C70 330th ST over Boone River?
It is owned by the County Highway Agency.