US Bridges

Route 147 over Coginchaug River

Good

Middlesex County, Connecticut · 0.7 MI S of Route 157 · Structure no. 01398

Built
2013
12 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
89 ft
1 main span
Daily traffic
5,400
2022 count
Owner
State
State Highway Agency

About this bridge

Route 147 over Coginchaug River is a steel stringer/multi-beam or girder carrying Route 147 over Coginchaug River in Middlesex County, Connecticut. It was built in 2013, so it is 12 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 5,400 vehicles a day, roughly 4% of them trucks, projected to reach 8,024 by 2042. The structure is 89 ft (27.1 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRoute 147
CrossesCoginchaug River
Location0.7 MI S of Route 157
RouteState Highway 147
Coordinates41.49541, -72.70498
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating41.4 US tons
Inventory rating31.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length89 ft (27.1 m)
Longest span80 ft (24.4 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,400 (2022)
Projected traffic8,024 by 2042
Trucks4%
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 147 over Coginchaug River built?

It was built in 2013, making it 12 years old in 2025.

What condition is Route 147 over Coginchaug 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 August 2024.

How much traffic does Route 147 over Coginchaug River carry?

About 5,400 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Route 147 over Coginchaug River?

The structure is 89 ft (27.1 m) long with a longest span of 80 ft (24.4 m) and a deck 36 ft wide.

Who owns Route 147 over Coginchaug River?

It is owned by the State Highway Agency.