US Bridges

SR721-NO Main ST over Route 8

Fair

New Haven County, Connecticut · .8M N of Rt 67 (ex 22 RT8 · Structure no. 04382

Built
1981
44 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
251 ft
2 main spans
Daily traffic
1,800
2021 count
Owner
State
State Highway Agency

About this bridge

SR721-NO Main ST over Route 8 is a steel stringer/multi-beam or girder carrying SR721-NO Main ST over Route 8 in New Haven County, Connecticut. It was built in 1981, so it is 44 years old, younger 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 5 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 1,800 vehicles a day, roughly 5% of them trucks, projected to reach 2,675 by 2041. The structure is 251 ft (76.5 m) long and 53 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSR721-NO Main ST
CrossesRoute 8
Location.8M N of Rt 67 (ex 22 RT8
RouteState Highway 721
CountyNew Haven County
StateConnecticut
Coordinates41.40638, -73.06932
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating37.5 US tons
Inventory rating28.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length251 ft (76.5 m)
Longest span126 ft (38.4 m)
Deck width53 ft (16.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2021)
Projected traffic2,675 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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 SR721-NO Main ST over Route 8 built?

It was built in 1981, making it 44 years old in 2025.

What condition is SR721-NO Main ST over Route 8 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 January 2024.

How much traffic does SR721-NO Main ST over Route 8 carry?

About 1,800 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is SR721-NO Main ST over Route 8?

The structure is 251 ft (76.5 m) long with a longest span of 126 ft (38.4 m) and a deck 53 ft wide.

Who owns SR721-NO Main ST over Route 8?

It is owned by the State Highway Agency.