Main St over Mill Creek
Knox County, Maine · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Main St over Mill Creek in Knox County, Maine, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1924 and reconstructed in 1962, making it 101 years old at the 2025 inventory.
- It carries about 16,917 vehicles a day (traffic count year 2016).
- Its listed owner is the state highway agency.
- It is one of 30 of the 54 inventoried bridges in Knox County rated fair (55.6%); 9 (16.7%) are rated poor.
- 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 → (44.08153, -69.17038)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 5 | Fair condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 27 ft |
| Location | 100 Ft W of Jct Rte 131 |
| NBI structure number | 2562 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Maine department of transportation.
Busiest bridges in Knox County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Main St over Megunticook River | 1931 | 11,473 | Poor |
| Atlantic Hwy over ST. George River | 1991 | 8,570 | Fair |
| Belfast Rd over Spring Brook | 2025 | 6,960 | Good |
| Heald Hwy over St George River | 1960 | 6,940 | Poor |
| Camden Rd over St George River | 1961 | 5,596 | Fair |
| Rockland Rd over Medomak River | 1931 | 4,890 | Fair |
All bridges nearby: Knox County, ME bridge conditions · every bridge in Knox County · Maine bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.