Maple Dam Road over Blackwater River
Dorchester County, Maryland · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Maple Dam Road over Blackwater River in Dorchester County, Maryland, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1997, making it 28 years old at the 2025 inventory.
- It carries about 645 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 35 of the 47 inventoried bridges in Dorchester County rated fair (74.5%); 5 (10.6%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated November 2023, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (38.38239, -76.06751)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Timber slab |
| Length | about 233 ft |
| Location | 13.34 Miles S. of Md. 16 |
| NBI structure number | 200000D-0012010 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Maryland department of transportation.
Busiest bridges in Dorchester County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 50 over Nanticoke River | 1990 | 28,510 | Fair |
| US 50 over Choptank River | 1987 | 27,191 | Fair |
| US 50 EB over Md 331 & Dp & L RR | 1990 | 24,661 | Good |
| US 50 WB over Md 331 & Dp & L RR | 1990 | 24,661 | Good |
| US 50 WB over Big Mill Pond | 1996 | 23,981 | Fair |
| US 50 EB over Big Mill Pond | 1967 | 23,981 | Fair |
All bridges nearby: Dorchester County, MD bridge conditions · every bridge in Dorchester County · Maryland bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.