Structure 3128B · New Haven County, CT

Interstate-91 SB over Route 150

Carries Interstate-91 SB over Route 150, I-91 Exit No. 14.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT66 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

66 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.

Built196561 years old
Length65.9 ft20.1 m
Daily traffic32,700counted 2022
Last inspectedSeptember 2023every 24 months

Location

StateConnecticut
CountyNew Haven
LocationI-91 Exit No. 14
CarriesInterstate-91 SB
CrossesRoute 150
Coordinates41.43424, -72.80278

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length65.9 ft (20.1 m)
Max Span60.0 ft (18.3 m)
Deck Width55.4 ft (16.9 m)
Deck Area339.7 sq m
Main Spans1
Year Built1965

Traffic

Avg Daily Traffic32,700 (2022)
Truck Traffic9%
Lanes On Bridge3
Lanes Under Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number03128B

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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