US Bridges

South Main Street over Beacon Falls Canal

Fair

New Haven County, Connecticut · 0.3 Mile No. of Route 42 · Structure no. 03001

Built
1920
105 years old, rebuilt 1949
Condition
Fair
inspected October 2023
Type
Arch - Deck
Concrete
Length
33 ft
1 main span
Daily traffic
7,800
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

South Main Street over Beacon Falls Canal is a concrete arch - deck carrying South Main Street over Beacon Falls Canal in New Haven County, Connecticut. It was built in 1920 and reconstructed in 1949, so it is 105 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 7,800 vehicles a day, roughly 3% of them trucks, projected to reach 11,590 by 2041. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSouth Main Street
CrossesBeacon Falls Canal
Location0.3 Mile No. of Route 42
RouteCity Street 0
Coordinates41.44158, -73.06151
Functional classUrban 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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span33 ft (10.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,800 (2021)
Projected traffic11,590 by 2041
Trucks3%
Lanes on structure3
Traffic directionTwo-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 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 South Main Street over Beacon Falls Canal built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1949.

What condition is South Main Street over Beacon Falls Canal 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 October 2023.

How much traffic does South Main Street over Beacon Falls Canal carry?

About 7,800 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is South Main Street over Beacon Falls Canal?

The structure is 33 ft (10.1 m) long with a longest span of 33 ft (10.1 m).

Who owns South Main Street over Beacon Falls Canal?

It is owned by the Town or Township Highway Agency.