US Bridges

US Route 1 over Quanaduck Cove

Good

New London County, Connecticut · 0.4 MI N of US Route 1A · Structure no. 01900

Built
2013
12 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
1 main span
Daily traffic
5,700
2020 count
Owner
State
State Highway Agency

About this bridge

US Route 1 over Quanaduck Cove is a steel stringer/multi-beam or girder carrying US Route 1 over Quanaduck Cove in New London County, Connecticut. It was built in 2013, so it is 12 years old, younger 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 5,700 vehicles a day, roughly 5% of them trucks, projected to reach 8,470 by 2040. The structure is 51 ft (15.5 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS Route 1
CrossesQuanaduck Cove
Location0.4 MI N of US Route 1A
RouteU.S. Route 1
Coordinates41.35053, -71.90614
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 rating57.5 US tons
Inventory rating44.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length51 ft (15.5 m)
Longest span47 ft (14.3 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,700 (2020)
Projected traffic8,470 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Quanaduck Cove built?

It was built in 2013, making it 12 years old in 2025.

What condition is US Route 1 over Quanaduck Cove 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 April 2023.

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

About 5,700 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is US Route 1 over Quanaduck Cove?

The structure is 51 ft (15.5 m) long with a longest span of 47 ft (14.3 m) and a deck 44 ft wide.

Who owns US Route 1 over Quanaduck Cove?

It is owned by the State Highway Agency.