North Thayer Road over Cisco Br Ontonagon River
PoorPosted for loadGogebic County, Michigan · Sec 32 Marenisco Twp · Structure no. 000000000003000
- Built
- 1954
- 71 years old
- Condition
- Poor
- inspected September 2024
- Type
- Tee Beam
- Concrete
- Length
- 43 ft
- 1 main span
- Daily traffic
- 46
- 1998 count
- Owner
- County
- County Highway Agency
About this bridge
North Thayer Road over Cisco Br Ontonagon River is a concrete tee beam carrying North Thayer Road over Cisco Br Ontonagon River in Gogebic County, Michigan. It was built in 1954, so it is 71 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: posted for load restriction.
It carries about 46 vehicles a day, projected to reach 46 by 2018. The structure is 43 ft (13.1 m) long and 18 ft wide. If it were closed, the detour would be 34.8 mi (56 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 | 7 Good | Some minor problems. |
| 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 North Thayer Road over Cisco Br Ontonagon River built?
It was built in 1954, making it 71 years old in 2025.
What condition is North Thayer Road over Cisco Br Ontonagon 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 September 2024.
How much traffic does North Thayer Road over Cisco Br Ontonagon River carry?
About 46 vehicles per day (1998 count).
How long is North Thayer Road over Cisco Br Ontonagon River?
The structure is 43 ft (13.1 m) long with a longest span of 42 ft (12.8 m) and a deck 18 ft wide.
Who owns North Thayer Road over Cisco Br Ontonagon River?
It is owned by the County Highway Agency.