Main St over Union River
Hancock County, Maine · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Main St over Union River in Hancock County, Maine, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1923 and reconstructed in 1990, making it 102 years old at the 2025 inventory.
- It carries about 16,449 vehicles a day (traffic count year 2016).
- Its listed owner is the state highway agency.
- It is one of 17 of the 69 inventoried bridges in Hancock County rated poor (24.6%); 17 (24.6%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (44.54087, -68.42588)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 4 | Poor condition |
| Superstructure | 4 | Poor condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Concrete deck arch |
| Length | about 158 ft |
| Location | .5 Mi S of Jct US1A |
| NBI structure number | 2499 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Maine department of transportation.
Busiest bridges in Hancock County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Bangor Rd over Union River | 1981 | 15,759 | Fair |
| Bar Harbor Rd over Mt Desert Narrows | 1958 | 15,122 | Fair |
| Route 1 over Kilkenny St | 2000 | 12,782 | Good |
| Maine Route 233 over Hulls Cove Road | 1928 | 12,768 | Fair |
| Main Rd over M C RR | 1973 | 10,891 | Fair |
| Route 1 over Penobscot Riv (E Chan) | 1988 | 10,092 | Fair |
All bridges nearby: Hancock County, ME bridge conditions · every bridge in Hancock County · Maine bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.