Structure B110042TNDOTNBI · Essex County, MA

ST 1 A/cabot ST over Water Danvers River

Carries ST 1 A/cabot ST over Water Danvers River, At Danvers River.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,233 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

2,233 ft end to end, longest span 220 ft: about 6.2 football fields. 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.

Built199630 years old
Length2232.9 ft680.6 m
Daily traffic48,600counted 2023
Last inspectedDecember 2023every 24 months

Location

StateMassachusetts
CountyEssex
LocationAt Danvers River
CarriesST 1 A/cabot ST
CrossesWater Danvers River
Coordinates42.53912, -70.88761

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length2232.9 ft (680.6 m)
Max Span220.1 ft (67.1 m)
Deck Width88.6 ft (27 m)
Deck Area18376.2 sq m
Main Spans14
Year Built1996

Traffic

Avg Daily Traffic48,600 (2023)
Truck Traffic4%
Lanes On Bridge4

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberB110042TNDOTNBI

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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