Structure U020161LRDOTNBI · Worcester County, MA

ST 16 Mendon ST over Water West River

Carries ST 16 Mendon ST over Water West River, 1.1 Mi. E. Of St-122.

Overall conditionFair

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

How ratings work
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT31 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck not ratedSuperstructure 7/9Substructure 6/9 · sets the rating

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.

Built1912rebuilt 1949
Length30.8 ft9.4 m
Daily traffic10,157counted 2022
Last inspectedSeptember 2023every 24 months

Location

StateMassachusetts
CountyWorcester
Location1.1 Mi. E. Of St-122
CarriesST 16 Mendon ST
CrossesWater West River
Coordinates42.08358, -71.60730

Physical Characteristics

MaterialMasonry
DesignArch - Deck
Total Length30.8 ft (9.4 m)
Max Span26.9 ft (8.2 m)
Deck Width48.6 ft (14.8 m)
Deck Area139.1 sq m
Main Spans1
Year Built1912 (reconstructed 1949)

Traffic

Avg Daily Traffic10,157 (2022)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical4 — Foundations need monitoring
Structure NumberU020161LRDOTNBI

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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