County RD 581 over Rocky Creek
PoorMarquette County, Michigan · 9 Miles S of Greenwood · Structure no. 000000000006539
- Built
- 1940
- 85 years old
- Condition
- Poor
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 25 ft
- 1 main span
- Daily traffic
- 890
- 2001 count
- Owner
- County
- County Highway Agency
About this bridge
County RD 581 over Rocky Creek is a steel stringer/multi-beam or girder carrying County RD 581 over Rocky Creek in Marquette County, Michigan. It was built in 1940, so it is 85 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.
It carries about 890 vehicles a day, projected to reach 1,000 by 2020. The structure is 25 ft (7.6 m) long and 23 ft wide. If it were closed, the detour would be 11.8 mi (19 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 County RD 581 over Rocky Creek built?
It was built in 1940, making it 85 years old in 2025.
What condition is County RD 581 over Rocky 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 October 2024.
How much traffic does County RD 581 over Rocky Creek carry?
About 890 vehicles per day (2001 count).
How long is County RD 581 over Rocky Creek?
The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 23 ft wide.
Who owns County RD 581 over Rocky Creek?
It is owned by the County Highway Agency.