Structure 27200890010000 · Cheshire County, NH

River Road South over Partridge Brook

Carries River Road South over Partridge Brook, 0.72 Mi Nh63.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 3 of 9.

How ratings work
Deck4/9 · Poor
Superstructure4/9 · Poor
Substructuresets the rating3/9 · Serious
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT147 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9Superstructure 4/9Substructure 3/9 · sets the rating

147 ft end to end, longest span 24 ft: about 2 semi-trucks nose to tail. Lengths and the semi-truck 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.

Built193789 years old
Length147.3 ft44.9 m
Daily traffic1,167counted 2023
Last inspectedOctober 2024every 16 months

Location

StateNew Hampshire
CountyCheshire
Location0.72 Mi Nh63
CarriesRiver Road South
CrossesPartridge Brook
Coordinates42.97445, -72.46452

Physical Characteristics

MaterialWood or Timber
DesignSlab
Total Length147.3 ft (44.9 m)
Max Span24.0 ft (7.3 m)
Deck Width25.3 ft (7.7 m)
Deck Area345.7 sq m
Main Spans6
Year Built1937

Traffic

Avg Daily Traffic1,167 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 16 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number027200890010000

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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