US Bridges

Route 4 over W. Branch Leadmine Brook

Fair

Litchfield County, Connecticut · 1.5 Miles West of RTE 118 · Structure no. 00426

Built
1959
66 years old, rebuilt 1986
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
8,500
2020 count
Owner
State
State Highway Agency

About this bridge

Route 4 over W. Branch Leadmine Brook is a steel stringer/multi-beam or girder carrying Route 4 over W. Branch Leadmine Brook in Litchfield County, Connecticut. It was built in 1959 and reconstructed in 1986, so it is 66 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 8,500 vehicles a day, roughly 6% of them trucks, projected to reach 12,630 by 2040. The structure is 40 ft (12.2 m) long and 46 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesRoute 4
CrossesW. Branch Leadmine Brook
Location1.5 Miles West of RTE 118
RouteState Highway 4
CountyLitchfield County
StateConnecticut
Coordinates41.78943, -73.07586
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.5 US tons
Inventory rating32.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span37 ft (11.3 m)
Deck width46 ft (13.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,500 (2020)
Projected traffic12,630 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Route 4 over W. Branch Leadmine Brook built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1986.

What condition is Route 4 over W. Branch Leadmine 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 July 2023.

How much traffic does Route 4 over W. Branch Leadmine Brook carry?

About 8,500 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Route 4 over W. Branch Leadmine Brook?

The structure is 40 ft (12.2 m) long with a longest span of 37 ft (11.3 m) and a deck 46 ft wide.

Who owns Route 4 over W. Branch Leadmine Brook?

It is owned by the State Highway Agency.