Structure B160984VFMBTNBI · Suffolk County, MA

HWY Green ST over Comb Amtrak/mbta & Orng

Carries HWY Green ST over Comb Amtrak/mbta & Orng, Btwn Oakdale & Washington.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT102 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

102 ft end to end, longest span 48 ft. 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 rigid-frame bridge.

Built198145 years old
Length102.0 ft31.1 m
Daily traffic3,300counted 1997
Last inspectedSeptember 2022every 24 months

Location

StateMassachusetts
CountySuffolk
LocationBtwn Oakdale & Washington
CarriesHWY Green ST
CrossesComb Amtrak/mbta & Orng
Coordinates42.31066, -71.10733

Physical Characteristics

MaterialConcrete Continuous
DesignFrame
Total Length102.0 ft (31.1 m)
Max Span48.2 ft (14.7 m)
Deck Width49.9 ft (15.2 m)
Deck Area472.7 sq m
Main Spans2
Year Built1981

Traffic

Avg Daily Traffic3,300 (1997)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2022
Inspection FrequencyEvery 24 months
OwnerOther State Agencies
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberB160984VFMBTNBI

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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