St 10 South St over Water Mill River
Hampshire County, Massachusetts · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- St 10 South St over Water Mill River in Hampshire County, Massachusetts, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1939, making it 86 years old at the 2025 inventory.
- It carries about 21,100 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 171 of the 258 inventoried bridges in Hampshire County rated fair (66.3%); 25 (9.7%) are rated poor.
- 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 → (42.30627, -72.64643)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 5 | Fair condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 105 ft |
| Location | 1.2 M S Jct St 9 |
| NBI structure number | N190530V1DOTNBI |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Massachusetts department of transportation.
Busiest bridges in Hampshire County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 91 NB over Hwy Old Ferry Rd | 1965 | 36,140 | Fair |
| I 91 SB over Hwy Old Ferry Rd | 1965 | 36,140 | Fair |
| St 10 Northmptn St over Water Manhan River | 1951 | 31,100 | Fair |
| St 9 Russell St over Water Connecticut River | 1937 | 30,785 | Fair |
| St 32 West St over Water Muddy Brook | 1966 | 29,870 | Fair |
| I 91 NB over Hwy Island Rd | 1965 | 27,903 | Fair |
All bridges nearby: Hampshire County, MA bridge conditions · every bridge in Hampshire County · Massachusetts bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.