US Bridges

US Route 1 over Quiambaug Cove

Fair

New London County, Connecticut · 1.5 MI N of Route 27 · Structure no. 00363

Built
1960
65 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
76 ft
1 main span
Daily traffic
7,000
2020 count
Owner
State
State Highway Agency

About this bridge

US Route 1 over Quiambaug Cove is a steel stringer/multi-beam or girder carrying US Route 1 over Quiambaug Cove in New London County, Connecticut. It was built in 1960, so it is 65 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 7,000 vehicles a day, roughly 5% of them trucks, projected to reach 10,401 by 2040. The structure is 76 ft (23.2 m) long and 46 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS Route 1
CrossesQuiambaug Cove
Location1.5 MI N of Route 27
RouteU.S. Route 1
CountyNew London County
StateConnecticut
Coordinates41.34212, -71.93693
Functional classUrban Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 alignment7: Better than present minimum criteria
Operating rating48.9 US tons
Inventory rating37.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span72 ft (21.9 m)
Deck width46 ft (14 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2020)
Projected traffic10,401 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 US Route 1 over Quiambaug Cove built?

It was built in 1960, making it 65 years old in 2025.

What condition is US Route 1 over Quiambaug Cove 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 2024.

How much traffic does US Route 1 over Quiambaug Cove carry?

About 7,000 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is US Route 1 over Quiambaug Cove?

The structure is 76 ft (23.2 m) long with a longest span of 72 ft (21.9 m) and a deck 46 ft wide.

Who owns US Route 1 over Quiambaug Cove?

It is owned by the State Highway Agency.