Structure W240221U1DOTNBI · Worcester County, MA

I 495 NB over Rr Mbta/csx

Carries I 495 NB over Rr Mbta/csx, 1.4 Mi So. Of ST 9.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 3 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating3/9 · Serious
Substructure5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT142 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 3/9 · sets the ratingSubstructure 5/9

142 ft end to end, longest span 64 ft. 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.

Built196858 years old
Length142.1 ft43.3 m
Daily traffic46,713counted 2022
Last inspectedDecember 2023every 6 months

Location

StateMassachusetts
CountyWorcester
Location1.4 Mi So. Of ST 9
CarriesI 495 NB
CrossesRr Mbta/csx
Coordinates42.26888, -71.56445

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length142.1 ft (43.3 m)
Max Span64.0 ft (19.5 m)
Deck Width56.1 ft (17.1 m)
Deck Area740.4 sq m
Main Spans3
Year Built1968

Traffic

Avg Daily Traffic46,713 (2022)
Truck Traffic8%
Lanes On Bridge4

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 6 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure NumberW240221U1DOTNBI

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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