US Bridges

INTERSTATE-95-NB over Groton Reservoir

Fair

New London County, Connecticut · 1.4 MI N of Route 12 · Structure no. 01778

Built
1964
61 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
483 ft
6 main spans
Daily traffic
29,300
2020 count
Owner
State
State Highway Agency

About this bridge

INTERSTATE-95-NB over Groton Reservoir is a prestressed concrete stringer/multi-beam or girder carrying INTERSTATE-95-NB over Groton Reservoir in New London County, Connecticut. It was built in 1964, so it is 61 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 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 29,300 vehicles a day, roughly 9% of them trucks, projected to reach 43,537 by 2040. The structure is 483 ft (147.2 m) long and 55 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesINTERSTATE-95-NB
CrossesGroton Reservoir
Location1.4 MI N of Route 12
RouteInterstate 95
CountyNew London County
StateConnecticut
Coordinates41.35977, -72.0411
Functional classUrban Principal Arterial - Interstate

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 protection7 GoodSome minor problems.
Last inspectionJanuary 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.2 US tons
Inventory rating38.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadH 20
Structure length483 ft (147.2 m)
Longest span80 ft (24.5 m)
Deck width55 ft (16.9 m)
Roadway width52 ft (15.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,300 (2020)
Projected traffic43,537 by 2040
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 INTERSTATE-95-NB over Groton Reservoir built?

It was built in 1964, making it 61 years old in 2025.

What condition is INTERSTATE-95-NB over Groton Reservoir 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 January 2024.

How much traffic does INTERSTATE-95-NB over Groton Reservoir carry?

About 29,300 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is INTERSTATE-95-NB over Groton Reservoir?

The structure is 483 ft (147.2 m) long with a longest span of 80 ft (24.5 m) and a deck 55 ft wide.

Who owns INTERSTATE-95-NB over Groton Reservoir?

It is owned by the State Highway Agency.