Structure 13600790008000 · Cheshire County, NH

Whitcomb Mills RD over White Brook

Carries Whitcomb Mills RD over White Brook, 0.06 Mi Fr Arch ST.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
23 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 4/9 · sets the rating

23 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 tee-beam bridge.

Built194086 years old
Length23.0 ft7 m
Daily traffic826counted 2023
Last inspectedNovember 2024every 16 months

Location

StateNew Hampshire
CountyCheshire
Location0.06 Mi Fr Arch ST
CarriesWhitcomb Mills RD
CrossesWhite Brook
Coordinates42.93543, -72.33241

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length23.0 ft (7 m)
Max Span20.0 ft (6.1 m)
Deck Width16.4 ft (5 m)
Deck Area35 sq m
Main Spans1
Year Built1940

Traffic

Avg Daily Traffic826 (2023)
Truck Traffic4%
Lanes On Bridge1

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 16 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number013600790008000

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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