US Bridges

Route 17 NB over Route 9

Fair

Middlesex County, Connecticut · 1.17 Miles from RTE 66 · Structure no. 00636

Built
1955
70 years old, rebuilt 1990
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
221 ft
4 main spans
Daily traffic
11,400
2022 count
Owner
State
State Highway Agency

About this bridge

Route 17 NB over Route 9 is a steel stringer/multi-beam or girder carrying Route 17 NB over Route 9 in Middlesex County, Connecticut. It was built in 1955 and reconstructed in 1990, so it is 70 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 11,400 vehicles a day, roughly 6% of them trucks, projected to reach 16,939 by 2042. The structure is 221 ft (67.4 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesRoute 17 NB
CrossesRoute 9
Location1.17 Miles from RTE 66
RouteState Highway 17
CountyMiddlesex County
StateConnecticut
Coordinates41.55588, -72.64165
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionMarch 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 geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment6: Equal to present minimum criteria
Operating rating98 US tons
Inventory rating59 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length221 ft (67.4 m)
Longest span62 ft (18.9 m)
Deck width44 ft (13.3 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,400 (2022)
Projected traffic16,939 by 2042
Trucks6%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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 17 NB over Route 9 built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1990.

What condition is Route 17 NB 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 March 2024.

How much traffic does Route 17 NB over Route 9 carry?

About 11,400 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Route 17 NB over Route 9?

The structure is 221 ft (67.4 m) long with a longest span of 62 ft (18.9 m) and a deck 44 ft wide.

Who owns Route 17 NB over Route 9?

It is owned by the State Highway Agency.