Structure H23023CD1MUNNBI · Middlesex County, MA

HWY Overlook RD over Comb Sddle Hll Tl & Brk

Carries HWY Overlook RD over Comb Sddle Hll Tl & Brk, 0.1 Mi E Of Greenwood RD.

Overall conditionFair

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

How ratings work
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT36 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck not ratedSuperstructure 6/9 · sets the ratingSubstructure 7/9

36 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.

Built200224 years old
Length36.1 ft11 m
Daily traffic1,200counted 2024
Last inspectedApril 2024every 24 months

Location

StateMassachusetts
CountyMiddlesex
Location0.1 Mi E Of Greenwood RD
CarriesHWY Overlook RD
CrossesComb Sddle Hll Tl & Brk
Coordinates42.25368, -71.54053

Physical Characteristics

MaterialConcrete
DesignArch - Deck
Total Length36.1 ft (11 m)
Max Span36.1 ft (11 m)
Deck Width42.0 ft (12.8 m)
Deck Area140.8 sq m
Main Spans1
Year Built2002

Traffic

Avg Daily Traffic1,200 (2024)
Truck Traffic1%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical6 — Scour calculated, stable
Structure NumberH23023CD1MUNNBI

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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