Conrad RD over US-31
FairMason County, Michigan · 3.4 MI E of Ludington · Structure no. 000000000006654
- Built
- 1987
- 38 years old
- Condition
- Fair
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 294 ft
- 2 main spans
- Daily traffic
- 420
- 1978 count
- Owner
- State
- State Highway Agency
About this bridge
Conrad RD over US-31 is a steel continuous stringer/multi-beam or girder carrying Conrad RD over US-31 in Mason County, Michigan. It was built in 1987, so it is 38 years old, younger than the Michigan average of 48.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 420 vehicles a day, projected to reach 420 by 1977. The structure is 294 ft (89.6 m) long and 39 ft wide. 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Conrad RD over US-31 built?
It was built in 1987, making it 38 years old in 2025.
What condition is Conrad RD over US-31 in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.
How much traffic does Conrad RD over US-31 carry?
About 420 vehicles per day (1978 count).
How long is Conrad RD over US-31?
The structure is 294 ft (89.6 m) long with a longest span of 148 ft (45.1 m) and a deck 39 ft wide.
Who owns Conrad RD over US-31?
It is owned by the State Highway Agency.