US Bridges

Tuttle Avenue over Mill River

Good

New Haven County, Connecticut · 0.2 MI East of Route 10 · Structure no. 04894

Built
1920
105 years old, rebuilt 2013
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
58 ft
1 main span
Daily traffic
974
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Tuttle Avenue over Mill River is a steel stringer/multi-beam or girder carrying Tuttle Avenue over Mill River in New Haven County, Connecticut. It was built in 1920 and reconstructed in 2013, so it is 105 years old, older 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 974 vehicles a day, roughly 2% of them trucks, projected to reach 1,447 by 2043. The structure is 58 ft (17.7 m) long and 38 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTuttle Avenue
CrossesMill River
Location0.2 MI East of Route 10
RouteCity Street 0
Coordinates41.42975, -72.90385
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating65.7 US tons
Inventory rating50.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length58 ft (17.7 m)
Longest span54 ft (16.5 m)
Deck width38 ft (11.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic974 (2023)
Projected traffic1,447 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 Tuttle Avenue over Mill River built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 2013.

What condition is Tuttle Avenue 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 October 2023.

How much traffic does Tuttle Avenue over Mill River carry?

About 974 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Tuttle Avenue over Mill River?

The structure is 58 ft (17.7 m) long with a longest span of 54 ft (16.5 m) and a deck 38 ft wide.

Who owns Tuttle Avenue over Mill River?

It is owned by the Town or Township Highway Agency.