Structure 23101180008900 · Belknap County, NH

Brook Road over Salmon Brook

Carries Brook Road over Salmon Brook, 0.1 Mi From Hale RD.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating4/9 · Poor
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 7/9Superstructure 7/9Substructure 4/9 · sets the rating

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 slab bridge.

Built1900rebuilt 2012
Length35.1 ft10.7 m
Daily traffic96counted 2023
Last inspectedNovember 2024every 16 months

Location

StateNew Hampshire
CountyBelknap
Location0.1 Mi From Hale RD
CarriesBrook Road
CrossesSalmon Brook
Coordinates43.51439, -71.62141

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length35.1 ft (10.7 m)
Max Span23.0 ft (7 m)
Deck Width16.1 ft (4.9 m)
Deck Area52.4 sq m
Main Spans1
Year Built1900 (reconstructed 2012)

Traffic

Avg Daily Traffic96 (2023)
Truck Traffic4%
Lanes On Bridge1

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 16 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number023101180008900

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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