Structure 301360013100 · Grafton County, NH

Cole Hill Road over Fowler River

Carries Cole Hill Road over Fowler River, 0.5 Mi From Shin Valley.

Overall conditionPoor

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

How ratings work
Deck6/9 · Satisfactory
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT43 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9Substructure 4/9 · sets the rating

43 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 multi-beam bridge.

Built193096 years old
Length43.0 ft13.1 m
Daily traffic96counted 2023
Last inspectedNovember 2024every 16 months

Location

StateNew Hampshire
CountyGrafton
Location0.5 Mi From Shin Valley
CarriesCole Hill Road
CrossesFowler River
Coordinates43.63231, -71.81347

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length43.0 ft (13.1 m)
Max Span34.1 ft (10.4 m)
Deck Width11.8 ft (3.6 m)
Deck Area47.2 sq m
Main Spans1
Year Built1930

Traffic

Avg Daily Traffic96 (2023)
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 Number000301360013100

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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