US Bridges

Bow Lane over Route 9

Fair

Middlesex County, Connecticut · 1.9 MI South of Route 66 · Structure no. 00632

Built
1958
67 years old, rebuilt 2016
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
148 ft
2 main spans
Daily traffic
1,800
2023 count
Owner
State
State Highway Agency

About this bridge

Bow Lane over Route 9 is a steel stringer/multi-beam or girder carrying Bow Lane over Route 9 in Middlesex County, Connecticut. It was built in 1958 and reconstructed in 2016, so it is 67 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 5 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 1,800 vehicles a day, roughly 6% of them trucks, projected to reach 2,675 by 2043. The structure is 148 ft (45 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesBow Lane
CrossesRoute 9
Location1.9 MI South of Route 66
RouteCity Street 0
CountyMiddlesex County
StateConnecticut
Coordinates41.54719, -72.63064
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.9 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length148 ft (45 m)
Longest span71 ft (21.6 m)
Deck width39 ft (11.9 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2023)
Projected traffic2,675 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Bow Lane over Route 9 built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2016.

What condition is Bow Lane over Route 9 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 2024.

How much traffic does Bow Lane over Route 9 carry?

About 1,800 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Bow Lane over Route 9?

The structure is 148 ft (45 m) long with a longest span of 71 ft (21.6 m) and a deck 39 ft wide.

Who owns Bow Lane over Route 9?

It is owned by the State Highway Agency.