Knab RD over Otter Creek
PoorMonroe County, Michigan · .05 MI N of S Otter Ck RD · Structure no. 000000000007242
- Built
- 1964
- 61 years old
- Condition
- Poor
- inspected September 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 105 ft
- 3 main spans
- Daily traffic
- 360
- 2017 count
- Owner
- County
- County Highway Agency
About this bridge
Knab RD over Otter Creek is a prestressed concrete box beam or girders - multiple carrying Knab RD over Otter Creek in Monroe County, Michigan. It was built in 1964, so it is 61 years old, older than the Michigan average of 48.3 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. Its operating status is: open, would be posted or closed except for temporary shoring.
It carries about 360 vehicles a day, roughly 18% of them trucks, projected to reach 414 by 2037. The structure is 105 ft (32 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Knab RD over Otter Creek built?
It was built in 1964, making it 61 years old in 2025.
What condition is Knab RD over Otter 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 September 2024.
How much traffic does Knab RD over Otter Creek carry?
About 360 vehicles per day (2017 count), of which roughly 18% are trucks.
How long is Knab RD over Otter Creek?
The structure is 105 ft (32 m) long with a longest span of 34 ft (10.3 m) and a deck 34 ft wide.
Who owns Knab RD over Otter Creek?
It is owned by the County Highway Agency.