Structure W300233W7DOTNBI · Bristol County, MA

ST 88 over St177 American Lgn HWY

Carries ST 88 over St177 American Lgn HWY, 1.5 Mi. S. Of US 6.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT125 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

125 ft end to end, longest span 59 ft. 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.

Built196165 years old
Length125.0 ft38.1 m
Daily traffic5,857counted 2023
Last inspectedSeptember 2023every 24 months

Location

StateMassachusetts
CountyBristol
Location1.5 Mi. S. Of US 6
CarriesST 88
CrossesSt177 American Lgn HWY
Coordinates41.63313, -71.07881

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length125.0 ft (38.1 m)
Max Span59.1 ft (18 m)
Deck Width50.2 ft (15.3 m)
Deck Area582.9 sq m
Main Spans3
Year Built1961

Traffic

Avg Daily Traffic5,857 (2023)
Truck Traffic11%
Lanes On Bridge2
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 NumberW300233W7DOTNBI

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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