US Bridges

SR 637 over Cabin Brook

Fair

New London County, Connecticut · 0.3 MI E of Route 11 · Structure no. 06781

Built
1971
54 years old
Condition
Fair
inspected November 2023
Type
Culvert
Steel
Length
29 ft
3 main spans
Daily traffic
5,100
2021 count
Owner
State
State Highway Agency

About this bridge

SR 637 over Cabin Brook is a steel culvert carrying SR 637 over Cabin Brook in New London County, Connecticut. It was built in 1971, so it is 54 years old, younger 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 6 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 5,100 vehicles a day, roughly 10% of them trucks, projected to reach 7,578 by 2041. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 637
CrossesCabin Brook
Location0.3 MI E of Route 11
RouteState Highway 637
CountyNew London County
StateConnecticut
Coordinates41.56045, -72.31925
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span7 ft (2.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,100 (2021)
Projected traffic7,578 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$805,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 637 over Cabin Brook built?

It was built in 1971, making it 54 years old in 2025.

What condition is SR 637 over Cabin Brook 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 November 2023.

How much traffic does SR 637 over Cabin Brook carry?

About 5,100 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is SR 637 over Cabin Brook?

The structure is 29 ft (8.8 m) long with a longest span of 7 ft (2.1 m).

Who owns SR 637 over Cabin Brook?

It is owned by the State Highway Agency.