Structure 14401210011700 · Grafton County, NH

Nh120 Park Lot Ped over Nhrr(abd)

Carries Nh120 Park Lot Ped over Nhrr(abd), .1 Mi From Jct RTE 4.

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
Substructure5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT28 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 4/9 · sets the ratingSubstructure 5/9

28 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 slab bridge.

Built196957 years old
Length27.9 ft8.5 m
Daily traffic5,317counted 2023
Last inspectedJuly 2024every 16 months

Location

StateNew Hampshire
CountyGrafton
Location.1 Mi From Jct RTE 4
CarriesNh120 Park Lot Ped
CrossesNhrr(abd)
Coordinates43.64256, -72.25420

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length27.9 ft (8.5 m)
Max Span24.0 ft (7.3 m)
Deck Width61.4 ft (18.7 m)
Deck Area158.9 sq m
Main Spans1
Year Built1969

Traffic

Avg Daily Traffic5,317 (2023)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 16 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number014401210011700

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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