US Bridges

I-691 TR 804 over Knotter Drive

Good

New Haven County, Connecticut · I-691 WB Exit No. 2 · Structure no. 05478

Built
1986
39 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
106 ft
1 main span
Daily traffic
9,700
2021 count
Owner
State
State Highway Agency

About this bridge

I-691 TR 804 over Knotter Drive is a prestressed concrete stringer/multi-beam or girder carrying I-691 TR 804 over Knotter Drive in New Haven County, Connecticut. It was built in 1986, so it is 39 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 9,700 vehicles a day, roughly 9% of them trucks, projected to reach 14,413 by 2041. The structure is 106 ft (32.3 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-691 TR 804
CrossesKnotter Drive
LocationI-691 WB Exit No. 2
RouteInterstate 691
CountyNew Haven County
StateConnecticut
Coordinates41.5608, -72.9103
Functional classUrban Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating58.5 US tons
Inventory rating42.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length106 ft (32.3 m)
Longest span100 ft (30.5 m)
Deck width34 ft (10.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,700 (2021)
Projected traffic14,413 by 2041
Trucks9%
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 NetworkInterstate 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 I-691 TR 804 over Knotter Drive built?

It was built in 1986, making it 39 years old in 2025.

What condition is I-691 TR 804 over Knotter Drive 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 October 2023.

How much traffic does I-691 TR 804 over Knotter Drive carry?

About 9,700 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is I-691 TR 804 over Knotter Drive?

The structure is 106 ft (32.3 m) long with a longest span of 100 ft (30.5 m) and a deck 34 ft wide.

Who owns I-691 TR 804 over Knotter Drive?

It is owned by the State Highway Agency.