Structure A090232J5DOTNBI · Essex County, MA

I 93 SB over Water Shawsheen River

Carries I 93 SB over Water Shawsheen River, 2.5 Mi South Of RT 133.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT52 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

52 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.

Built1958rebuilt 1972
Length51.8 ft15.8 m
Daily traffic77,340counted 2019
Last inspectedMay 2023every 24 months

Location

StateMassachusetts
CountyEssex
Location2.5 Mi South Of RT 133
CarriesI 93 SB
CrossesWater Shawsheen River
Coordinates42.61476, -71.17507

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length51.8 ft (15.8 m)
Max Span46.6 ft (14.2 m)
Deck Width71.2 ft (21.7 m)
Deck Area342.9 sq m
Main Spans1
Year Built1958 (reconstructed 1972)

Traffic

Avg Daily Traffic77,340 (2019)
Truck Traffic10%
Lanes On Bridge3

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure NumberA090232J5DOTNBI

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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