Johnstone RD over Shiawassee River
Good Condition40 years old798 vehicles/day
Location
| State | Michigan |
| County | Shiawassee |
| Location | 3.25 Mi NE Of Henderson |
| Carries | Johnstone RD |
| Crosses | Shiawassee River |
| Coordinates | 43.12877, -84.16232 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 279.9 ft (85.3 m) |
| Max Span | 91.9 ft (28 m) |
| Deck Width | 36.4 ft (11.1 m) |
| Deck Area | 946.8 sq m |
| Main Spans | 3 |
| Year Built | 1986 |
Traffic
| Avg Daily Traffic | 798 (2011) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 424 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Historical significance is not determined |
| Structure Number | 000000000009857 |