Hwy Prentiss St over Comb Amtrak/mbta & Orng
Suffolk County, Massachusetts · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Hwy Prentiss St over Comb Amtrak/mbta & Orng in Suffolk County, Massachusetts, 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 1981, making it 44 years old at the 2025 inventory.
- It carries about 5,450 vehicles a day (traffic count year 2022).
- It is one of 331 of the 490 inventoried bridges in Suffolk County rated fair (67.6%); 49 (10.0%) 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 September 2022, on a 24-month routine inspection cycle.
- 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 → (42.33351, -71.09302)
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 | Continuous concrete frame |
| Length | about 81 ft |
| Location | 1ST Br S of Ruggles St |
| NBI structure number | B160894V9MBTNBI |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2022 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Massachusetts department of transportation.
Busiest bridges in Suffolk County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 93 /US1/ST3 over Comb Mbta & Red Ln Ssh | 1957 | 211,123 | Fair |
| I 93 /US1/ST3 over Hwy Victory Rd | 1955 | 193,593 | Fair |
| I 93 /US1/ST3 over Hwy Conley St | 1955 | 193,593 | Fair |
| I 93 /US1/ST3 over Comb Mbta & Columbia Rd | 1958 | 193,500 | Fair |
| I 93 /US1/ST3 over Hwy Hallet Street | 1956 | 190,508 | Fair |
| I 93 /US1/ST3 over RR CSX Spur | 1958 | 188,320 | Fair |
All bridges nearby: Suffolk County, MA bridge conditions · every bridge in Suffolk County · Massachusetts bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.