7th Street over Black River
Fair Condition93 years old9,076 vehicles/day
Location
| State | Michigan |
| County | St. Clair |
| Location | In Port Huron |
| Carries | 7th Street |
| Crosses | Black River |
| Coordinates | 42.97654, -82.42737 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Movable - Bascule |
| Total Length | 272.3 ft (83 m) |
| Max Span | 114.8 ft (35 m) |
| Deck Width | 56.8 ft (17.3 m) |
| Deck Area | 1435.9 sq m |
| Main Spans | 1 |
| Year Built | 1933 (reconstructed 2007) |
Traffic
| Avg Daily Traffic | 9,076 (2012) |
| Truck Traffic | 15% |
| Lanes On Bridge | 3 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is on the National Register of Historic Places |
| Structure Number | 000000000010256 |