Structure 7200620006500 · Grafton County, NH

Nh116 over Wild Ammonoosuc River

Carries Nh116 over Wild Ammonoosuc River, .02 Mi S Jct. 112.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT42 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

42 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.

Built1927rebuilt 1949
Length42.0 ft12.8 m
Daily traffic882counted 2023
Last inspectedMarch 2024every 24 months

Location

StateNew Hampshire
CountyGrafton
Location.02 Mi S Jct. 112
CarriesNh116
CrossesWild Ammonoosuc River
Coordinates44.09796, -71.84842

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length42.0 ft (12.8 m)
Max Span39.0 ft (11.9 m)
Deck Width32.2 ft (9.8 m)
Deck Area125.4 sq m
Main Spans1
Year Built1927 (reconstructed 1949)

Traffic

Avg Daily Traffic882 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number007200620006500

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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