Route 171 over Little River
Windham County, Connecticut · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Route 171 over Little River in Windham County, Connecticut, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1951 and reconstructed in 1988, making it 74 years old at the 2025 inventory.
- It carries about 9,300 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 79 of the 264 inventoried bridges in Windham County rated good (29.9%); 23 (8.7%) 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 October 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (41.93361, -71.93774)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 76 ft |
| Location | 0.3 Mi W of Thompson Tl |
| NBI structure number | 01423 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 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 Connecticut department of transportation.
Busiest bridges in Windham County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate-395 NB over US Route 6 | 1963 | 129,000 | Fair |
| Interstate 95 over Noroton River | 1958 | 123,700 | Fair |
| Interstate-395 over Roper Road | 1958 | 32,700 | Fair |
| Interstate-395 over Plainfield Road | 1958 | 30,400 | Fair |
| Interstate-395 over Mill Brook | 1958 | 30,000 | Good |
| Interstate-395 over Lathrop Brook | 1958 | 30,000 | Good |
All bridges nearby: Windham County, CT bridge conditions · every bridge in Windham County · Connecticut bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.