Structure B162013GNDOT634 · Suffolk County, MA

HWY W Fifth ST over Comb Haul RD & Mbta Red

Carries HWY W Fifth ST over Comb Haul RD & Mbta Red, 1371 M SW Of D ST Office.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT67 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9Substructure 5/9 · sets the rating

67 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.

Built1918rebuilt 1997
Length66.6 ft20.3 m
Daily traffic1,939counted 2023
Last inspectedNovember 2023every 24 months

Location

StateMassachusetts
CountySuffolk
Location1371 M SW Of D ST Office
CarriesHWY W Fifth ST
CrossesComb Haul RD & Mbta Red
Coordinates42.33984, -71.05601

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length66.6 ft (20.3 m)
Max Span61.0 ft (18.6 m)
Deck Width50.5 ft (15.4 m)
Deck Area312.6 sq m
Main Spans1
Year Built1918 (reconstructed 1997)

Traffic

Avg Daily Traffic1,939 (2023)
Truck Traffic6%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberB162013GNDOT634

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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