US Bridges

INTERSTATE-395 over SR 647 (lathrop Road)

Fair

Windham County, Connecticut · 3.7 MI North of Route 201 · Structure no. 00297

Built
1958
67 years old, rebuilt 1990
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
133 ft
3 main spans
Daily traffic
25,000
2017 count
Owner
State
State Highway Agency

About this bridge

INTERSTATE-395 over SR 647 (lathrop Road) is a steel stringer/multi-beam or girder carrying INTERSTATE-395 over SR 647 (lathrop Road) in Windham County, Connecticut. It was built in 1958 and reconstructed in 1990, so it is 67 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 25,000 vehicles a day, roughly 14% of them trucks, projected to reach 37,148 by 2037. The structure is 133 ft (40.6 m) long and 104 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesINTERSTATE-395
CrossesSR 647 (lathrop Road)
Location3.7 MI North of Route 201
RouteInterstate 395
CountyWindham County
StateConnecticut
Coordinates41.66512, -71.91445
Functional classRural 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.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length133 ft (40.6 m)
Longest span66 ft (20.2 m)
Deck width104 ft (31.6 m)
Roadway width76 ft (23.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,000 (2017)
Projected traffic37,148 by 2037
Trucks14%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was INTERSTATE-395 over SR 647 (lathrop Road) built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1990.

What condition is INTERSTATE-395 over SR 647 (lathrop Road) 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 March 2023.

How much traffic does INTERSTATE-395 over SR 647 (lathrop Road) carry?

About 25,000 vehicles per day (2017 count), of which roughly 14% are trucks.

How long is INTERSTATE-395 over SR 647 (lathrop Road)?

The structure is 133 ft (40.6 m) long with a longest span of 66 ft (20.2 m) and a deck 104 ft wide.

Who owns INTERSTATE-395 over SR 647 (lathrop Road)?

It is owned by the State Highway Agency.