Structure H2500624JMUNNBI · Middlesex County, MA

HWY Forest AVE over Water Assabet River

Carries HWY Forest AVE over Water Assabet River, .2 M SE Of RTE 62.

Overall conditionFair

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

How ratings work
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT66 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck not ratedSuperstructure 5/9 · sets the ratingSubstructure 7/9

66 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.

Built1910116 years old
Length65.9 ft20.1 m
Daily traffic3,900counted 2024
Last inspectedMarch 2024every 24 months

Location

StateMassachusetts
CountyMiddlesex
Location.2 M SE Of RTE 62
CarriesHWY Forest AVE
CrossesWater Assabet River
Coordinates42.38922, -71.55977

Physical Characteristics

MaterialConcrete
DesignArch - Deck
Total Length65.9 ft (20.1 m)
Max Span62.0 ft (18.9 m)
Deck Width29.9 ft (9.1 m)
Deck Area182.9 sq m
Main Spans1
Year Built1910

Traffic

Avg Daily Traffic3,900 (2024)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure NumberH2500624JMUNNBI

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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