Isleboro Ferry Sl. over Gilkey Harbor
Waldo County, Maine · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Isleboro Ferry Sl. over Gilkey Harbor in Waldo County, Maine, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 2009, making it 16 years old at the 2025 inventory.
- It carries about 742 vehicles a day (traffic count year 2016).
- Its listed owner is the state highway agency.
- It is one of 62 of the 92 inventoried bridges in Waldo County rated fair (67.4%); 15 (16.3%) 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 October 2023, on a 24-month routine inspection cycle.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- 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 → (44.28095, -68.94283)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel movable lift |
| Length | about 81 ft |
| Location | End of SH 214 |
| NBI structure number | 6343 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Maine department of transportation.
Busiest bridges in Waldo County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Searsport Av over Passagassawaukeag + RR | 1963 | 18,553 | Fair |
| Searsport Av over Goose River | 2021 | 12,663 | Good |
| Route 1 Byp over Route 3 (belmont Av) | 1973 | 7,983 | Fair |
| Atlantic Hwy over Little River | 1944 | 7,764 | Poor |
| N Main St over Mill Stream (cove Brook) | 1979 | 7,491 | Fair |
| Atlantic Hwy over Frohock Brook | 2004 | 6,734 | Good |
All bridges nearby: Waldo County, ME bridge conditions · every bridge in Waldo County · Maine bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.