Flat Rock Bridge R over Salmon Falls River
York County, Maine · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Flat Rock Bridge R over Salmon Falls River in York County, Maine, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1984, making it 41 years old at the 2025 inventory.
- It carries about 1,050 vehicles a day (traffic count year 2016).
- Its listed owner is the state highway agency.
- It is one of 77 of the 236 inventoried bridges in York County rated good (32.6%); 22 (9.3%) 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 July 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (43.34318, -70.96617)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 87 ft |
| Location | 0.4 Mi SW River Rd |
| NBI structure number | 1221 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2024 |
| 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 Maine department of transportation.
Busiest bridges in York County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 95 over Eliot Rd | 1972 | 41,190 | Fair |
| I-95 over Dennett Road | 1971 | 40,420 | Fair |
| I 95 over Piscataqua River Rte 103 | 1971 | 40,420 | Fair |
| I-95(SB) over Saco River | 1948 | 35,170 | Fair |
| I-95 (NB) over Saco River | 1947 | 34,410 | Fair |
| I-95 SB & NB over Spruce Creek | 1947 | 31,420 | Fair |
All bridges nearby: York County, ME bridge conditions · every bridge in York County · Maine bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.