Structure 11602010007200 · Carroll County, NH

Us302 over Nancy Brook

Carries Us302 over Nancy Brook, 8.3 Mi Carroll Tl.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT41 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 41 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.

Built197848 years old
Length41.0 ft12.5 m
Daily traffic1,978counted 2023
Last inspectedAugust 2024every 24 months

Location

StateNew Hampshire
CountyCarroll
Location8.3 Mi Carroll Tl
CarriesUs302
CrossesNancy Brook
Coordinates44.11260, -71.35377

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length41.0 ft (12.5 m)
Max Span41.0 ft (12.5 m)
Deck Area167.5 sq m
Main Spans1
Year Built1978

Traffic

Avg Daily Traffic1,978 (2023)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number011602010007200

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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