US Bridges

Cook Hill Road over Mill River

Good

New Haven County, Connecticut · 0.5 MI E of Route 10 · Structure no. 05824

Built
1990
35 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
4,600
2019 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Cook Hill Road over Mill River is a concrete culvert carrying Cook Hill Road over Mill River in New Haven County, Connecticut. It was built in 1990, so it is 35 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 4,600 vehicles a day, roughly 2% of them trucks, projected to reach 6,835 by 2039. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCook Hill Road
CrossesMill River
Location0.5 MI E of Route 10
RouteCity Street 0
Coordinates41.46713, -72.89662
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,600 (2019)
Projected traffic6,835 by 2039
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Cook Hill Road over Mill River built?

It was built in 1990, making it 35 years old in 2025.

What condition is Cook Hill Road over Mill River 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 May 2023.

How much traffic does Cook Hill Road over Mill River carry?

About 4,600 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Cook Hill Road over Mill River?

The structure is 26 ft (7.9 m) long with a longest span of 13 ft (4 m).

Who owns Cook Hill Road over Mill River?

It is owned by the Town or Township Highway Agency.