Structure 11500560005800 · Cheshire County, NH

Chesham Road over Minnewawa Brook

Carries Chesham Road over Minnewawa Brook, 0.3 Mi Fr Dublin Tl.

Overall conditionPoor

Set by its lowest-rated component: Deck and Superstructure at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructuresets the rating4/9 · Poor
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT90 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 4/9 · sets the ratingSubstructure 6/9

90 ft end to end, longest span 30 ft. 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 slab bridge.

Built1939rebuilt 1984
Length89.9 ft27.4 m
Daily traffic1,191counted 2023
Last inspectedNovember 2024every 8 months

Location

StateNew Hampshire
CountyCheshire
Location0.3 Mi Fr Dublin Tl
CarriesChesham Road
CrossesMinnewawa Brook
Coordinates42.92732, -72.15175

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length89.9 ft (27.4 m)
Max Span29.9 ft (9.1 m)
Deck Width26.9 ft (8.2 m)
Deck Area224.7 sq m
Main Spans3
Year Built1939 (reconstructed 1984)

Traffic

Avg Daily Traffic1,191 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 8 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number011500560005800

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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