US Bridges

Autumn Ridge Road over Riggs Street Brook

Good

New Haven County, Connecticut · 330 Ft E of Riggs Street · Structure no. 06546

Built
1994
31 years old
Condition
Good
inspected June 2024
Type
Culvert
Steel
Length
27 ft
2 main spans
Daily traffic
39
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Autumn Ridge Road over Riggs Street Brook is a steel culvert carrying Autumn Ridge Road over Riggs Street Brook in New Haven County, Connecticut. It was built in 1994, so it is 31 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 39 vehicles a day, roughly 1% of them trucks, projected to reach 58 by 2042. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 98.8 mi (159 km).

CarriesAutumn Ridge Road
CrossesRiggs Street Brook
Location330 Ft E of Riggs Street
RouteCity Street 0
Coordinates41.44648, -73.11495
Functional classRural 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 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 rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39 (2022)
Projected traffic58 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Autumn Ridge Road over Riggs Street Brook built?

It was built in 1994, making it 31 years old in 2025.

What condition is Autumn Ridge Road over Riggs Street Brook 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 June 2024.

How much traffic does Autumn Ridge Road over Riggs Street Brook carry?

About 39 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Autumn Ridge Road over Riggs Street Brook?

The structure is 27 ft (8.2 m) long with a longest span of 11 ft (3.4 m).

Who owns Autumn Ridge Road over Riggs Street Brook?

It is owned by the Town or Township Highway Agency.