US Bridges

SR 660 over Little River

Good

New London County, Connecticut · .3 MI North of Route 97 · Structure no. 05848

Built
1990
35 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete Continuous
Length
54 ft
4 main spans
Daily traffic
2,600
2023 count
Owner
State
State Highway Agency

About this bridge

SR 660 over Little River is a concrete continuous culvert carrying SR 660 over Little River in New London County, Connecticut. It was built in 1990, so it is 35 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 2,600 vehicles a day, roughly 5% of them trucks, projected to reach 3,863 by 2043. The structure is 54 ft (16.5 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSR 660
CrossesLittle River
Location.3 MI North of Route 97
RouteState Highway 660
Coordinates41.59981, -72.04559
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadUnknown
Structure length54 ft (16.5 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,600 (2023)
Projected traffic3,863 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 SR 660 over Little River built?

It was built in 1990, making it 35 years old in 2025.

What condition is SR 660 over Little River 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 December 2023.

How much traffic does SR 660 over Little River carry?

About 2,600 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is SR 660 over Little River?

The structure is 54 ft (16.5 m) long with a longest span of 12 ft (3.7 m).

Who owns SR 660 over Little River?

It is owned by the State Highway Agency.