St 12 Sthbridge St over Water Dunns Pond Outlet
Worcester County, Massachusetts · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- St 12 Sthbridge St over Water Dunns Pond Outlet in Worcester 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 1957 and reconstructed in 2003, making it 68 years old at the 2025 inventory.
- It carries about 9,506 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 678 of the 1,020 inventoried bridges in Worcester County rated fair (66.5%); 78 (7.6%) 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 May 2024, 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 → (42.20558, -71.83469)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete slab |
| Length | about 29 ft |
| Location | .1 Mi W of Auburn St |
| NBI structure number | A170121YQDOTNBI |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Massachusetts department of transportation.
Busiest bridges in Worcester County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 90 over Water Blackstone River | 1957 | 130,647 | Fair |
| I 290 over Hwy Seymour St | 1959 | 126,972 | Fair |
| I 290 over Hwy Endicott St | 1959 | 126,870 | Fair |
| I 290 & Ramps over Hwy Prospect St | 1958 | 114,878 | Fair |
| I 90 over Water French River | 1957 | 104,900 | Fair |
| I 290 over ST146 Millbury St | 2007 | 96,092 | Good |
All bridges nearby: Worcester County, MA bridge conditions · every bridge in Worcester County · Massachusetts bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.