US Bridges

US Route 1 over Poquonock River

Fair

New London County, Connecticut · 0.5 MI S of US Route 1 · Structure no. 06517

Built
1994
31 years old
Condition
Fair
inspected February 2024
Type
Channel Beam
Prestressed Concrete
Length
55 ft
1 main span
Daily traffic
12,900
2020 count
Owner
State
State Highway Agency

About this bridge

US Route 1 over Poquonock River is a prestressed concrete channel beam carrying US Route 1 over Poquonock River in New London County, Connecticut. It was built in 1994, so it is 31 years old, younger 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 12,900 vehicles a day, roughly 3% of them trucks, projected to reach 19,168 by 2040. The structure is 55 ft (16.8 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS Route 1
CrossesPoquonock River
Location0.5 MI S of US Route 1
RouteU.S. Route 1
Coordinates41.34672, -72.03795
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating42.1 US tons
Inventory rating32.5 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length55 ft (16.8 m)
Longest span50 ft (15.2 m)
Deck width55 ft (16.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,900 (2020)
Projected traffic19,168 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Poquonock River built?

It was built in 1994, making it 31 years old in 2025.

What condition is US Route 1 over Poquonock River 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 February 2024.

How much traffic does US Route 1 over Poquonock River carry?

About 12,900 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is US Route 1 over Poquonock River?

The structure is 55 ft (16.8 m) long with a longest span of 50 ft (15.2 m) and a deck 55 ft wide.

Who owns US Route 1 over Poquonock River?

It is owned by the State Highway Agency.