Structure F08026ANWDOTNBI · Norfolk County, MA

St140 W Central ST over I 495

Carries St140 W Central ST over I 495, 3 Mi S Of St-126.

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 FT234 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

234 ft end to end, longest span 116 ft: about 3 semi-trucks nose to tail. 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.

Built200620 years old
Length233.6 ft71.2 m
Daily traffic98,432counted 2024
Last inspectedMay 2024every 24 months

Location

StateMassachusetts
CountyNorfolk
Location3 Mi S Of St-126
CarriesSt140 W Central ST
CrossesI 495
Coordinates42.09011, -71.42722

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length233.6 ft (71.2 m)
Max Span116.1 ft (35.4 m)
Deck Width106.6 ft (32.5 m)
Deck Area2,314 sq m
Main Spans2
Year Built2006

Traffic

Avg Daily Traffic98,432 (2024)
Truck Traffic10%
Lanes On Bridge6
Lanes Under Bridge6

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure NumberF08026ANWDOTNBI

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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