Casco Bay Bridge over Fore River
Cumberland County, Maine · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Casco Bay Bridge over Fore River in Cumberland County, Maine, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1998, making it 27 years old at the 2025 inventory.
- It carries about 14,893 vehicles a day (traffic count year 2016).
- Its listed owner is the state highway agency.
- It is one of 216 of the 344 inventoried bridges in Cumberland County rated fair (62.8%); 35 (10.2%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated good in the 2024 inventory and is now fair (substructure 7 to 6).
- Its most recent inspection on record is dated October 2024, 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 → (43.64504, -70.25789)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel movable bascule |
| Length | about 4,748 ft |
| Location | Portland - S Portland Tl |
| NBI structure number | 5900 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Maine department of transportation.
Busiest bridges in Cumberland County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 295 NB over Back Bay (atlantic O) | 1960 | 42,190 | Fair |
| I 295 SB over US1 Forest Ave | 1973 | 37,920 | Fair |
| I-95 over Nonesuch River | 1947 | 37,280 | Good |
| I 295 SB over St James Street | 1973 | 36,970 | Fair |
| I 295 SB over Ptrr | 1972 | 36,970 | Fair |
| I 295 SB over St John Steet | 1972 | 36,970 | Fair |
All bridges nearby: Cumberland County, ME bridge conditions · every bridge in Cumberland County · Maine bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.