Bia Route 421 over E Br Passadumkeag River
Penobscot County, Maine · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Bia Route 421 over E Br Passadumkeag River in Penobscot County, Maine, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 2 (critical condition) on the 0-9 scale.
- It was built in 2007, making it 18 years old at the 2025 inventory.
- It carries about 20 vehicles a day (traffic count year 2024).
- It is one of 60 of the 317 inventoried bridges in Penobscot County rated poor (18.9%); 60 (18.9%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (poor), but component ratings moved: deck 4 to 2, substructure 7 to 6.
- Its most recent inspection on record is dated July 2024, on a 24-month routine inspection cycle.
- 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 → (45.32676, -68.22056)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 2 | Critical condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 7 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 40 ft |
| Location | 7.89 Km SE Lee Me |
| NBI structure number | 0000S50018B0061 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 7: scour countermeasures installed |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Maine department of transportation.
Busiest bridges in Penobscot County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 95 over Route 15 (broadway) | 1960 | 25,340 | Poor |
| I 95 over Kenduskeag Str&valley Av | 1960 | 25,340 | Fair |
| I 95 SB over Stillwater Avenue | 1960 | 25,150 | Poor |
| I 95 NB over Stillwater Avenue | 1960 | 25,120 | Poor |
| Penob River Br over Penobscot R & RR Yard | 1997 | 24,636 | Fair |
| I 95 SB over Industrial Spur (I-395) | 1960 | 23,160 | Fair |
All bridges nearby: Penobscot County, ME bridge conditions · every bridge in Penobscot County · Maine bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.