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Kirby Brook Road over Kirby Brook

Litchfield County, Connecticut · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Kirby Brook Road over Kirby Brook in Litchfield County, Connecticut, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1956, making it 69 years old at the 2025 inventory.
It carries about 20 vehicles a day (traffic count year 2016).
Its listed owner is a town or township highway agency.
It is one of 284 of the 470 inventoried bridges in Litchfield County rated fair (60.4%); 35 (7.4%) 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.

Component ratings

Component	Rating (2025)	FHWA scale meaning
Culvert	6	Satisfactory condition


Structure	Continuous concrete culvert
Length	about 35 ft
Location	0.2 Mi W of Route 199
NBI structure number	05163
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the Connecticut department of transportation.

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