US Bridges

Kirby Brook Road over Kirby Brook

Fair

Litchfield County, Connecticut · 0.2 MI W of Route 199 · Structure no. 05163

Built
1956
69 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete Continuous
Length
35 ft
2 main spans
Daily traffic
20
2016 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Kirby Brook Road over Kirby Brook is a concrete continuous culvert carrying Kirby Brook Road over Kirby Brook in Litchfield County, Connecticut. It was built in 1956, so it is 69 years old, older than the Connecticut average of 56.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 20 vehicles a day, roughly 1% of them trucks, projected to reach 30 by 2036. The structure is 35 ft (10.7 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesKirby Brook Road
CrossesKirby Brook
Location0.2 MI W of Route 199
RouteCity Street 0
Coordinates41.61984, -73.32058
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckOther
Main spans2
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span17 ft (5.2 m)
Deck width22 ft (6.6 m)
Roadway width18 ft (5.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2016)
Projected traffic30 by 2036
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Kirby Brook Road over Kirby Brook built?

It was built in 1956, making it 69 years old in 2025.

What condition is Kirby Brook Road over Kirby Brook in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does Kirby Brook Road over Kirby Brook carry?

About 20 vehicles per day (2016 count), of which roughly 1% are trucks.

How long is Kirby Brook Road over Kirby Brook?

The structure is 35 ft (10.7 m) long with a longest span of 17 ft (5.2 m) and a deck 22 ft wide.

Who owns Kirby Brook Road over Kirby Brook?

It is owned by the Town or Township Highway Agency.