US Bridges

US Route 6 over Quanduck Brook

Fair

Windham County, Connecticut · 1.5 MI W of Ri State Line · Structure no. 00504

Built
1946
79 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
6,100
2019 count
Owner
State
State Highway Agency

About this bridge

US Route 6 over Quanduck Brook is a concrete continuous culvert carrying US Route 6 over Quanduck Brook in Windham County, Connecticut. It was built in 1946, so it is 79 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 6,100 vehicles a day, roughly 7% of them trucks, projected to reach 9,064 by 2039. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS Route 6
CrossesQuanduck Brook
Location1.5 MI W of Ri State Line
RouteU.S. Route 6
CountyWindham County
StateConnecticut
Coordinates41.79176, -71.80021
Functional classRural Principal Arterial - Other

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.3 US tons
Inventory rating38.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,100 (2019)
Projected traffic9,064 by 2039
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US Route 6 over Quanduck Brook built?

It was built in 1946, making it 79 years old in 2025.

What condition is US Route 6 over Quanduck 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 June 2023.

How much traffic does US Route 6 over Quanduck Brook carry?

About 6,100 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is US Route 6 over Quanduck Brook?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns US Route 6 over Quanduck Brook?

It is owned by the State Highway Agency.