Structure 791 · New Haven County, CT

Route 15 over Quinnipiac Street

Carries Route 15 over Quinnipiac Street, 0.7 Mi N Of No Haven T.l.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT57 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

57 ft end to end. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1947rebuilt 1988
Length57.1 ft17.4 m
Daily traffic63,700counted 2022
Last inspectedDecember 2022every 24 months

Location

StateConnecticut
CountyNew Haven
Location0.7 Mi N Of No Haven T.l
CarriesRoute 15
CrossesQuinnipiac Street
Coordinates41.45865, -72.83658

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length57.1 ft (17.4 m)
Max Span52.2 ft (15.9 m)
Deck Width99.4 ft (30.3 m)
Deck Area527.2 sq m
Main Spans1
Year Built1947 (reconstructed 1988)

Traffic

Avg Daily Traffic63,700 (2022)
Truck Traffic1%
Lanes On Bridge5
Lanes Under Bridge3

Inspection & Ownership

Last InspectionDecember 2022
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number00791

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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