Structure 601630018400 · Belknap County, NH

Nh 11 over Merrymeeting River

Carries Nh 11 over Merrymeeting River, 8.5 Mi From Gilford Tl.

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
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT35 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 4/9 · sets the ratingSubstructure 5/9

35 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.

Built193492 years old
Length35.1 ft10.7 m
Daily traffic10,346counted 2023
Last inspectedNovember 2024every 8 months

Location

StateNew Hampshire
CountyBelknap
Location8.5 Mi From Gilford Tl
CarriesNh 11
CrossesMerrymeeting River
Coordinates43.47009, -71.23402

Physical Characteristics

MaterialConcrete
DesignFrame
Total Length35.1 ft (10.7 m)
Max Span29.9 ft (9.1 m)
Deck Width37.7 ft (11.5 m)
Deck Area123.0 sq m
Main Spans1
Year Built1934

Traffic

Avg Daily Traffic10,346 (2023)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 8 months
OwnerState Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000601630018400

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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