US Bridges

Route 4 over W Branch Leadmine Brook

Good

Litchfield County, Connecticut · 100 Ft E of Torrington Tl · Structure no. 00425

Built
1959
66 years old, rebuilt 2016
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
42 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 2016, 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,500 vehicles a day, roughly 6% of them trucks, projected to reach 12,630 by 2040. The structure is 42 ft (12.9 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRoute 4
CrossesW Branch Leadmine Brook
Location100 Ft E of Torrington Tl
RouteState Highway 4
Coordinates41.79812, -73.08241
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating106.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length42 ft (12.9 m)
Longest span35 ft (10.7 m)
Deck width44 ft (13.3 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 closed1.2 mi (2 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 2016.

What condition is Route 4 over W Branch Leadmine Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 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 42 ft (12.9 m) long with a longest span of 35 ft (10.7 m) and a deck 44 ft wide.

Who owns Route 4 over W Branch Leadmine Brook?

It is owned by the State Highway Agency.