Shingle Mill Road over Rock Brook
Litchfield County, Connecticut · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Shingle Mill Road over Rock Brook in Litchfield County, Connecticut, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2019, making it 6 years old at the 2025 inventory.
- It carries about 64 vehicles a day (traffic count year 2024).
- Its listed owner is a town or township highway agency.
- It is one of 151 of the 470 inventoried bridges in Litchfield County rated good (32.1%); 35 (7.4%) 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 → (41.75351, -73.04859)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Concrete deck arch |
| Length | about 52 ft |
| Location | 1.5 Mile South of Route 4 |
| NBI structure number | 05053 |
| 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) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Connecticut department of transportation.
Busiest bridges in Litchfield County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate-95 over Route 10 | 1957 | 132,600 | Good |
| Interstate-95 over Richards Avenue | 1956 | 115,900 | Fair |
| US 202 & Route 67 over Housatonic River | 1953 | 23,800 | Fair |
| Route 8 Northbound over Laurel Hill Road | 1966 | 22,000 | Fair |
| US Route 44 Rte 1 over Still River | 1949 | 18,500 | Poor |
| Route 8 Northbound over Branch Brook | 1964 | 16,800 | Poor |
All bridges nearby: Litchfield County, CT bridge conditions · every bridge in Litchfield County · Connecticut bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.