Structure G080161YXDOTNBI · Worcester County, MA

St122 A/main ST over Water Blackstone Canal

Carries St122 A/main ST over Water Blackstone Canal, .5 Mi N Of Jct St-122.

Overall conditionFair

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

How ratings work
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
CAR · 15 FT31 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck not ratedSuperstructure 6/9Substructure 6/9

31 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 deck arch.

Built1898128 years old
Length31.5 ft9.6 m
Daily traffic4,452counted 2023
Last inspectedMay 2024every 24 months

Location

StateMassachusetts
CountyWorcester
Location.5 Mi N Of Jct St-122
CarriesSt122 A/main ST
CrossesWater Blackstone Canal
Coordinates42.17732, -71.69018

Physical Characteristics

MaterialMasonry
DesignArch - Deck
Total Length31.5 ft (9.6 m)
Max Span31.5 ft (9.6 m)
Deck Width40.0 ft (12.2 m)
Deck Area117.1 sq m
Main Spans1
Year Built1898

Traffic

Avg Daily Traffic4,452 (2023)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical7 — Countermeasures installed
Structure NumberG080161YXDOTNBI

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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