US Bridges

US Route 1 NB over I-95 Ramp 310 SR 641 SB

Poor

New London County, Connecticut · 0.1 MI N of I-95 · Structure no. 02572

Built
1973
52 years old
Condition
Poor
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
301 ft
2 main spans
Daily traffic
6,100
2023 count
Owner
State
State Highway Agency

About this bridge

US Route 1 NB over I-95 Ramp 310 SR 641 SB is a steel continuous stringer/multi-beam or girder carrying US Route 1 NB over I-95 Ramp 310 SR 641 SB in New London County, Connecticut. It was built in 1973, so it is 52 years old, younger than the Connecticut average of 56.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 6,100 vehicles a day, roughly 6% of them trucks, projected to reach 9,064 by 2043. The structure is 301 ft (91.6 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS Route 1 NB
CrossesI-95 Ramp 310 SR 641 SB
Location0.1 MI N of I-95
RouteU.S. Route 1
CountyNew London County
StateConnecticut
Coordinates41.3653, -72.10794
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.2 US tons
Inventory rating21.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length301 ft (91.6 m)
Longest span154 ft (46.8 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,100 (2023)
Projected traffic9,064 by 2043
Trucks6%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$13.8 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was US Route 1 NB over I-95 Ramp 310 SR 641 SB built?

It was built in 1973, making it 52 years old in 2025.

What condition is US Route 1 NB over I-95 Ramp 310 SR 641 SB in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does US Route 1 NB over I-95 Ramp 310 SR 641 SB carry?

About 6,100 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is US Route 1 NB over I-95 Ramp 310 SR 641 SB?

The structure is 301 ft (91.6 m) long with a longest span of 154 ft (46.8 m) and a deck 28 ft wide.

Who owns US Route 1 NB over I-95 Ramp 310 SR 641 SB?

It is owned by the State Highway Agency.