Johnstone RD over Shiawassee River
GoodShiawassee County, Michigan · 3.25 MI NE of Henderson · Structure no. 000000000009857
- Built
- 1986
- 39 years old
- Condition
- Good
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 280 ft
- 3 main spans
- Daily traffic
- 798
- 2011 count
- Owner
- County
- County Highway Agency
About this bridge
Johnstone RD over Shiawassee River is a prestressed concrete stringer/multi-beam or girder carrying Johnstone RD over Shiawassee River in Shiawassee County, Michigan. It was built in 1986, so it is 39 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 798 vehicles a day, roughly 10% of them trucks, projected to reach 1,186 by 2031. The structure is 280 ft (85.3 m) long and 36 ft wide. If it were closed, the detour would be 6.8 mi (11 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Johnstone RD over Shiawassee River built?
It was built in 1986, making it 39 years old in 2025.
What condition is Johnstone RD over Shiawassee 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 April 2024.
How much traffic does Johnstone RD over Shiawassee River carry?
About 798 vehicles per day (2011 count), of which roughly 10% are trucks.
How long is Johnstone RD over Shiawassee River?
The structure is 280 ft (85.3 m) long with a longest span of 92 ft (28 m) and a deck 36 ft wide.
Who owns Johnstone RD over Shiawassee River?
It is owned by the County Highway Agency.