First ST over Blackhawk Creek
PoorGrundy County, Iowa · 088150501 · Structure no. 000000000004146
- Built
- 1977
- 48 years old
- Condition
- Poor
- inspected April 2024
- Type
- Slab
- Concrete Continuous
- Length
- 103 ft
- 3 main spans
- Daily traffic
- 1,429
- 2022 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
First ST over Blackhawk Creek is a concrete continuous slab carrying First ST over Blackhawk Creek in Grundy County, Iowa. It was built in 1977, so it is 48 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 1,429 vehicles a day, roughly 13% of them trucks, projected to reach 1,429 by 2044. The structure is 103 ft (31.4 m) long and 49 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| 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 First ST over Blackhawk Creek built?
It was built in 1977, making it 48 years old in 2025.
What condition is First ST over Blackhawk 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 April 2024.
How much traffic does First ST over Blackhawk Creek carry?
About 1,429 vehicles per day (2022 count), of which roughly 13% are trucks.
How long is First ST over Blackhawk Creek?
The structure is 103 ft (31.4 m) long with a longest span of 39 ft (11.9 m) and a deck 49 ft wide.
Who owns First ST over Blackhawk Creek?
It is owned by the City or Municipal Highway Agency.