Mcmurphy Road over Thunder Bay River
GoodMontmorency County, Michigan · Sections 20-21 Avery Twp · Structure no. 000000000012717
- Built
- 2003
- 22 years old
- Condition
- Good
- inspected November 2023
- Type
- Culvert
- Concrete
- Length
- 44 ft
- 1 main span
- Daily traffic
- 60
- 2009 count
- Owner
- County
- County Highway Agency
About this bridge
Mcmurphy Road over Thunder Bay River is a concrete culvert carrying Mcmurphy Road over Thunder Bay River in Montmorency County, Michigan. It was built in 2003, so it is 22 years old, younger than the Michigan average of 48.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 60 vehicles a day, roughly 3% of them trucks, projected to reach 110 by 2029. The structure is 44 ft (13.5 m) long. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mcmurphy Road over Thunder Bay River built?
It was built in 2003, making it 22 years old in 2025.
What condition is Mcmurphy Road over Thunder Bay River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.
How much traffic does Mcmurphy Road over Thunder Bay River carry?
About 60 vehicles per day (2009 count), of which roughly 3% are trucks.
How long is Mcmurphy Road over Thunder Bay River?
The structure is 44 ft (13.5 m) long with a longest span of 42 ft (12.8 m).
Who owns Mcmurphy Road over Thunder Bay River?
It is owned by the County Highway Agency.