Structure U02001B9NDOTNBI · Worcester County, MA

St122 Main ST over Water Blackstone River

Carries St122 Main ST over Water Blackstone River, 2.2mi.nth Of Millville Tl.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT116 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

116 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.

Built201214 years old
Length116.5 ft35.5 m
Daily traffic4,318counted 2023
Last inspectedFebruary 2025every 24 months

Location

StateMassachusetts
CountyWorcester
Location2.2mi.nth Of Millville Tl
CarriesSt122 Main ST
CrossesWater Blackstone River
Coordinates42.05495, -71.61627

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length116.5 ft (35.5 m)
Max Span111.9 ft (34.1 m)
Deck Width49.5 ft (15.1 m)
Deck Area536.0 sq m
Main Spans1
Year Built2012

Traffic

Avg Daily Traffic4,318 (2023)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure NumberU02001B9NDOTNBI

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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