US Bridges

Route 9 Southbound over Route 155

Fair

Middlesex County, Connecticut · 2.50 MI No of Haddam Tl · Structure no. 00630

Built
1959
66 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
128 ft
3 main spans
Daily traffic
21,600
2022 count
Owner
State
State Highway Agency

About this bridge

Route 9 Southbound over Route 155 is a steel stringer/multi-beam or girder carrying Route 9 Southbound over Route 155 in Middlesex County, Connecticut. It was built in 1959, so it is 66 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 21,600 vehicles a day, roughly 6% of them trucks, projected to reach 32,095 by 2042. The structure is 128 ft (39 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRoute 9 Southbound
CrossesRoute 155
Location2.50 MI No of Haddam Tl
RouteState Highway 9
Coordinates41.53441, -72.61868
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.3 US tons
Inventory rating34.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length128 ft (39 m)
Longest span60 ft (18.3 m)
Deck width50 ft (15.2 m)
Roadway width46 ft (14.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,600 (2022)
Projected traffic32,095 by 2042
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Route 9 Southbound over Route 155 built?

It was built in 1959, making it 66 years old in 2025.

What condition is Route 9 Southbound over Route 155 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 March 2024.

How much traffic does Route 9 Southbound over Route 155 carry?

About 21,600 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Route 9 Southbound over Route 155?

The structure is 128 ft (39 m) long with a longest span of 60 ft (18.3 m) and a deck 50 ft wide.

Who owns Route 9 Southbound over Route 155?

It is owned by the State Highway Agency.