Structure Q010074UGMBTNBI · Norfolk County, MA

HWY Granite ST over Tr Red Line Ssh

Carries HWY Granite ST over Tr Red Line Ssh, 130 Ft SW Of Hancock ST.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT81 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

81 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 multi-beam bridge.

Built197155 years old
Length81.0 ft24.7 m
Daily traffic8,200counted 1997
Last inspectedDecember 2022every 24 months

Location

StateMassachusetts
CountyNorfolk
Location130 Ft SW Of Hancock ST
CarriesHWY Granite ST
CrossesTr Red Line Ssh
Coordinates42.24887, -71.00376

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length81.0 ft (24.7 m)
Max Span68.9 ft (21 m)
Deck Width98.1 ft (29.9 m)
Deck Area738.5 sq m
Main Spans1
Year Built1971

Traffic

Avg Daily Traffic8,200 (1997)
Truck Traffic10%
Lanes On Bridge4

Inspection & Ownership

Last InspectionDecember 2022
Inspection FrequencyEvery 24 months
OwnerOther State Agencies
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberQ010074UGMBTNBI

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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