US Bridges

Mill Road over Nonewaug River

FairPosted for load

Litchfield County, Connecticut · 25 Feet South of Route 6 · Structure no. 05065

Built
1900
125 years old, rebuilt 1991
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
64 ft
1 main span
Daily traffic
318
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Mill Road over Nonewaug River is a wood or timber stringer/multi-beam or girder carrying Mill Road over Nonewaug River in Litchfield County, Connecticut. It was built in 1900 and reconstructed in 1991, so it is 125 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. Its operating status is: posted for load restriction.

It carries about 318 vehicles a day, roughly 5% of them trucks, projected to reach 473 by 2044. The structure is 64 ft (19.5 m) long and 12 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMill Road
CrossesNonewaug River
Location25 Feet South of Route 6
RouteCity Street 0
Coordinates41.57701, -73.17559
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating25.7 US tons
Inventory rating20 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length64 ft (19.5 m)
Longest span59 ft (18 m)
Deck width12 ft (3.7 m)
Roadway width10 ft (3.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic318 (2024)
Projected traffic473 by 2044
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Road over Nonewaug River built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1991.

What condition is Mill Road over Nonewaug River 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 2024.

How much traffic does Mill Road over Nonewaug River carry?

About 318 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Mill Road over Nonewaug River?

The structure is 64 ft (19.5 m) long with a longest span of 59 ft (18 m) and a deck 12 ft wide.

Who owns Mill Road over Nonewaug River?

It is owned by the Town or Township Highway Agency.