Structure 3096 · New Haven County, CT

Interstate-91 over Route 17

Carries Interstate-91 over Route 17, Exit 8 Route 91.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT184 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

184 ft end to end, longest span 99 ft: about 3 semi-trucks nose to tail. Lengths and the semi-truck 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
Length184.1 ft56.1 m
Daily traffic112,800counted 2022
Last inspectedJuly 2024every 24 months

Location

StateConnecticut
CountyNew Haven
LocationExit 8 Route 91
CarriesInterstate-91
CrossesRoute 17
Coordinates41.32418, -72.88291

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length184.1 ft (56.1 m)
Max Span99.4 ft (30.3 m)
Deck Width151.6 ft (46.2 m)
Deck Area2591.8 sq m
Main Spans2
Year Built1965

Traffic

Avg Daily Traffic112,800 (2022)
Truck Traffic14%
Lanes On Bridge9
Lanes Under Bridge4

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number03096

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.

Nearby Bridges