Structure 5625 · New Haven County, CT

Route 70 over Quinnipiac River

Carries Route 70 over Quinnipiac River, 1 Mile West Of RTE 71 Jct.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT106 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

106 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 box-beam bridge.

Built198838 years old
Length106.0 ft32.3 m
Daily traffic7,400counted 2022
Last inspectedMarch 2024every 24 months

Location

StateConnecticut
CountyNew Haven
Location1 Mile West Of RTE 71 Jct
CarriesRoute 70
CrossesQuinnipiac River
Coordinates41.51815, -72.82587

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length106.0 ft (32.3 m)
Max Span102.0 ft (31.1 m)
Deck Width53.5 ft (16.3 m)
Deck Area526.5 sq m
Main Spans1
Year Built1988

Traffic

Avg Daily Traffic7,400 (2022)
Truck Traffic5%
Lanes On Bridge3

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number05625

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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