Structure N04010376DOT634 · Norfolk County, MA

HWY Greendale Av over Rr Mbta

Carries HWY Greendale Av over Rr Mbta, Needham Line Mp 10.39.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
CAR · 15 FT32 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck not ratedSuperstructure 6/9Substructure 5/9 · sets the rating

32 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 deck arch.

Built1850rebuilt 1932
Length32.2 ft9.8 m
Daily traffic6,700counted 2024
Last inspectedJanuary 2024every 24 months

Location

StateMassachusetts
CountyNorfolk
LocationNeedham Line Mp 10.39
CarriesHWY Greendale Av
CrossesRr Mbta
Coordinates42.27710, -71.20425

Physical Characteristics

MaterialConcrete
DesignArch - Deck
Total Length32.2 ft (9.8 m)
Max Span32.2 ft (9.8 m)
Deck Width48.9 ft (14.9 m)
Deck Area146.0 sq m
Main Spans1
Year Built1850 (reconstructed 1932)

Traffic

Avg Daily Traffic6,700 (2024)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure NumberN04010376DOT634

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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