US Bridges

Route 138 over Pachaug River

Fair

New London County, Connecticut · 1 MI West of Route 49 · Structure no. 01356

Built
1953
72 years old
Condition
Fair
inspected May 2024
Type
Frame
Concrete
Length
24 ft
1 main span
Daily traffic
5,500
2020 count
Owner
State
State Highway Agency

About this bridge

Route 138 over Pachaug River is a concrete frame carrying Route 138 over Pachaug River in New London County, Connecticut. It was built in 1953, so it is 72 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 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 5,500 vehicles a day, roughly 3% of them trucks, projected to reach 8,172 by 2040. The structure is 24 ft (7.2 m) long and 96 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRoute 138
CrossesPachaug River
Location1 MI West of Route 49
RouteState Highway 138
Coordinates41.57271, -71.87333
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length24 ft (7.2 m)
Longest span20 ft (6.1 m)
Deck width96 ft (29.3 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,500 (2020)
Projected traffic8,172 by 2040
Trucks3%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Route 138 over Pachaug River built?

It was built in 1953, making it 72 years old in 2025.

What condition is Route 138 over Pachaug River 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 May 2024.

How much traffic does Route 138 over Pachaug River carry?

About 5,500 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Route 138 over Pachaug River?

The structure is 24 ft (7.2 m) long with a longest span of 20 ft (6.1 m) and a deck 96 ft wide.

Who owns Route 138 over Pachaug River?

It is owned by the State Highway Agency.