Structure 7201390014800 · Grafton County, NH

Nh116 over Ham Branch

Carries Nh116 over Ham Branch, 1.0 Mi S. Franconia T.l..

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall3/9 · Serious
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT27 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 5/9

27 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 rigid-frame bridge.

Built193393 years old
Length26.9 ft8.2 m
Daily traffic836counted 2023
Last inspectedMarch 2024every 24 months

Location

StateNew Hampshire
CountyGrafton
Location1.0 Mi S. Franconia T.l.
CarriesNh116
CrossesHam Branch
Coordinates44.15948, -71.77550

Physical Characteristics

MaterialConcrete
DesignFrame
Total Length26.9 ft (8.2 m)
Max Span24.9 ft (7.6 m)
Deck Width24.0 ft (7.3 m)
Deck Area59.9 sq m
Main Spans1
Year Built1933

Traffic

Avg Daily Traffic836 (2023)
Truck Traffic10%
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 Number007201390014800

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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