Mariaville Rd over W.br. Union River
Hancock County, Maine · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mariaville Rd over W.br. Union River in Hancock County, Maine, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2017, making it 8 years old at the 2025 inventory.
- It carries about 221 vehicles a day (traffic count year 2016).
- Its listed owner is the state highway agency.
- It is one of 16 of the 69 inventoried bridges in Hancock County rated good (23.2%); 17 (24.6%) 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 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 → (44.76416, -68.3864)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 182 ft |
| Location | 4 Mi So Townline |
| NBI structure number | 3562 |
| 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) | 8: foundations stable, scour above the top of the footing |
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 |
|---|---|---|---|
| Main St over Union River | 1923 | 16,449 | Poor |
| 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 |
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.