Twelve Mile over Novi-Lyon Drain
PoorPosted for loadOakland County, Michigan · East of Martindale · Structure no. 000000000008200
- Built
- 1961
- 64 years old
- Condition
- Poor
- inspected December 2024
- Type
- Culvert
- Steel
- Length
- 25 ft
- 2 main spans
- Daily traffic
- 300
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Twelve Mile over Novi-Lyon Drain is a steel culvert carrying Twelve Mile over Novi-Lyon Drain in Oakland County, Michigan. It was built in 1961, so it is 64 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 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. Its operating status is: posted for load restriction.
It carries about 300 vehicles a day, roughly 5% of them trucks, projected to reach 550 by 2025. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 3.1 mi (5 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 |
|---|---|---|
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Culvert | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Twelve Mile over Novi-Lyon Drain built?
It was built in 1961, making it 64 years old in 2025.
What condition is Twelve Mile over Novi-Lyon Drain 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 December 2024.
How much traffic does Twelve Mile over Novi-Lyon Drain carry?
About 300 vehicles per day (2015 count), of which roughly 5% are trucks.
How long is Twelve Mile over Novi-Lyon Drain?
The structure is 25 ft (7.6 m) long with a longest span of 11 ft (3.3 m).
Who owns Twelve Mile over Novi-Lyon Drain?
It is owned by the County Highway Agency.