US Bridges

SR 660 over Brook

Good

New London County, Connecticut · .2 MI South of Route 138 · Structure no. 05895

Built
1990
35 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete Continuous
Length
20 ft
2 main spans
Daily traffic
800
2020 count
Owner
State
State Highway Agency

About this bridge

SR 660 over Brook is a concrete continuous culvert carrying SR 660 over Brook 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 800 vehicles a day, roughly 3% of them trucks, projected to reach 1,189 by 2040. The structure is 20 ft (6.1 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR 660
CrossesBrook
Location.2 MI South of Route 138
RouteState Highway 660
CountyNew London County
StateConnecticut
Coordinates41.61183, -72.03552
Functional classUrban 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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckOther
Main spans2
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span9 ft (2.7 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2020)
Projected traffic1,189 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Brook built?

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

What condition is SR 660 over Brook 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 October 2023.

How much traffic does SR 660 over Brook carry?

About 800 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is SR 660 over Brook?

The structure is 20 ft (6.1 m) long with a longest span of 9 ft (2.7 m) and a deck 32 ft wide.

Who owns SR 660 over Brook?

It is owned by the State Highway Agency.