US Bridges

Routes 9 & 17 over Sumner Brook

Fair

Middlesex County, Connecticut · JCT of Rtes 9 & 17 · Structure no. 00637

Built
1953
72 years old
Condition
Fair
inspected November 2024
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
55,700
2022 count
Owner
State
State Highway Agency

About this bridge

Routes 9 & 17 over Sumner Brook is a concrete culvert carrying Routes 9 & 17 over Sumner Brook in Middlesex 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 55,700 vehicles a day, roughly 8% of them trucks, projected to reach 82,765 by 2042. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesRoutes 9 & 17
CrossesSumner Brook
LocationJCT of Rtes 9 & 17
RouteState Highway 9
Coordinates41.55652, -72.64268
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55,700 (2022)
Projected traffic82,765 by 2042
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Routes 9 & 17 over Sumner Brook built?

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

What condition is Routes 9 & 17 over Sumner Brook 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 Routes 9 & 17 over Sumner Brook carry?

About 55,700 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Routes 9 & 17 over Sumner Brook?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m).

Who owns Routes 9 & 17 over Sumner Brook?

It is owned by the State Highway Agency.