Black Rock RD over Mill Creek
Fair Condition118 years old2,740 vehicles/day
Location
| State | Pennsylvania |
| County | Montgomery |
| Location | 0.9 Mi W Sr23 Adc 3478-c5 |
| Carries | Black Rock RD |
| Crosses | Mill Creek |
| Coordinates | 40.03310, -75.29360 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 7 — Countermeasures installed |
Physical Characteristics
| Material | Concrete |
| Design | Slab |
| Total Length | 29.9 ft (9.1 m) |
| Max Span | 26.9 ft (8.2 m) |
| Deck Width | 25.6 ft (7.8 m) |
| Deck Area | 71.0 sq m |
| Main Spans | 1 |
| Year Built | 1908 (reconstructed 1999) |
Traffic
| Avg Daily Traffic | 2,740 (2019) |
| Truck Traffic | 12% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000027955 |