Structure 1401490007300 · Belknap County, NH

Hannah Nutter Road over Big River

Carries Hannah Nutter Road over Big River, 0.1 Mi Fr New Rochester.

Overall conditionGood

Set by its lowest-rated component: Culvert at 8 of 9.

How ratings work
Culvertsets the rating8/9 · Very Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT42 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 8/9

A culvert 42 ft across. 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, so those are drawn as typical for a culvert.

Built20242 years old
Length42.3 ft12.9 m
Daily traffic96counted 2023
Last inspectedSeptember 2024every 24 months

Location

StateNew Hampshire
CountyBelknap
Location0.1 Mi Fr New Rochester
CarriesHannah Nutter Road
CrossesBig River
Coordinates43.33136, -71.23898

Physical Characteristics

MaterialPrestressed Concrete
DesignCulvert
Total Length42.3 ft (12.9 m)
Max Span42.3 ft (12.9 m)
Deck Width27.9 ft (8.5 m)
Deck Area109.7 sq m
Main Spans1
Year Built2024

Traffic

Avg Daily Traffic96 (2023)
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number001401490007300

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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