Structure U020541N1DOTNBI · Worcester County, MA

St146 SB over ST 98 Aldrich ST

Carries St146 SB over ST 98 Aldrich ST, Mm2.6 0.1 Mi W Of St146a.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT94 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 7/9

94 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.

Built198442 years old
Length94.2 ft28.7 m
Daily traffic13,844counted 2025
Last inspectedJanuary 2025every 24 months

Location

StateMassachusetts
CountyWorcester
LocationMm2.6 0.1 Mi W Of St146a
CarriesSt146 SB
CrossesST 98 Aldrich ST
Coordinates42.03882, -71.62307

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length94.2 ft (28.7 m)
Max Span85.0 ft (25.9 m)
Deck Width44.9 ft (13.7 m)
Deck Area393.2 sq m
Main Spans1
Year Built1984

Traffic

Avg Daily Traffic13,844 (2025)
Truck Traffic8%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberU020541N1DOTNBI

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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