US Bridges

Route 39 over Wimisink Brook

Fair

Fairfield County, Connecticut · Route 55 Junction · Structure no. 00962

Built
1934
91 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
1,100
2020 count
Owner
State
State Highway Agency

About this bridge

Route 39 over Wimisink Brook is a concrete slab carrying Route 39 over Wimisink Brook in Fairfield County, Connecticut. It was built in 1934, so it is 91 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 5 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 1,100 vehicles a day, roughly 2% of them trucks, projected to reach 1,634 by 2040. The structure is 23 ft (7 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesRoute 39
CrossesWimisink Brook
LocationRoute 55 Junction
RouteState Highway 39
CountyFairfield County
StateConnecticut
Coordinates41.63823, -73.4983
Functional classRural Major Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2020)
Projected traffic1,634 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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 39 over Wimisink Brook built?

It was built in 1934, making it 91 years old in 2025.

What condition is Route 39 over Wimisink 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 April 2023.

How much traffic does Route 39 over Wimisink Brook carry?

About 1,100 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Route 39 over Wimisink Brook?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m) and a deck 35 ft wide.

Who owns Route 39 over Wimisink Brook?

It is owned by the State Highway Agency.