70th Street over M Br Black River
Poor Condition55 years old277 vehicles/day
Location
| State | Michigan |
| County | Allegan |
| Location | Approx 0.50 Mi S Of 103rd |
| Carries | 70th Street |
| Crosses | M Br Black River |
| Coordinates | 42.43096, -86.22657 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 4 (Poor) |
| Channel/Waterway | 4 (Poor) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Wood or Timber |
| Design | Slab |
| Total Length | 104.0 ft (31.7 m) |
| Max Span | 25.9 ft (7.9 m) |
| Deck Width | 29.5 ft (9 m) |
| Deck Area | 285.3 sq m |
| Main Spans | 4 |
| Year Built | 1971 |
Traffic
| Avg Daily Traffic | 277 (2020) |
| Truck Traffic | 7% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 12 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000000218 |