Structure 21601420014500 · Grafton County, NH

US 3 over US 3a Nh 25 WB

Carries US 3 over US 3a Nh 25 WB, 4.1 Mi From Rumney Tl.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT122 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 7/9

122 ft end to end. 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 multi-beam bridge.

Built1965rebuilt 1993
Length121.7 ft37.1 m
Daily traffic4,355counted 2023
Last inspectedMarch 2023every 24 months

Location

StateNew Hampshire
CountyGrafton
Location4.1 Mi From Rumney Tl
CarriesUS 3
CrossesUS 3a Nh 25 WB
Coordinates43.77130, -71.68507

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length121.7 ft (37.1 m)
Max Span116.5 ft (35.5 m)
Deck Width50.9 ft (15.5 m)
Deck Area575.0 sq m
Main Spans1
Year Built1965 (reconstructed 1993)

Traffic

Avg Daily Traffic4,355 (2023)
Truck Traffic4%
Lanes On Bridge3
Lanes Under Bridge4

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number021601420014500

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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