Armstrong Street over I&m Canal
PoorGrundy County, Illinois · 150 E of Washington · Structure no. 032701000000000
- Built
- 1990
- 35 years old
- Condition
- Poor
- inspected June 2023
- Type
- Channel Beam
- Concrete
- Length
- 84 ft
- 3 main spans
- Daily traffic
- 1,000
- 2024 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Armstrong Street over I&m Canal is a concrete channel beam carrying Armstrong Street over I&m Canal in Grundy County, Illinois. It was built in 1990, so it is 35 years old, younger than the Illinois average of 45.3 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 1,000 vehicles a day, roughly 20% of them trucks, projected to reach 1,080 by 2046. The structure is 84 ft (25.6 m) long and 45 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Armstrong Street over I&m Canal built?
It was built in 1990, making it 35 years old in 2025.
What condition is Armstrong Street over I&m Canal 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 June 2023.
How much traffic does Armstrong Street over I&m Canal carry?
About 1,000 vehicles per day (2024 count), of which roughly 20% are trucks.
How long is Armstrong Street over I&m Canal?
The structure is 84 ft (25.6 m) long with a longest span of 29 ft (8.9 m) and a deck 45 ft wide.
Who owns Armstrong Street over I&m Canal?
It is owned by the City or Municipal Highway Agency.