Structure 19801070012200 · Coos County, NH

Winter Street over Roaring Brook

Carries Winter Street over Roaring Brook, 0.3 Mi E Nh RTE 110.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT31 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

31 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.

Built1956rebuilt 2017
Length30.8 ft9.4 m
Daily traffic585counted 2023
Last inspectedJune 2024every 24 months

Location

StateNew Hampshire
CountyCoos
Location0.3 Mi E Nh RTE 110
CarriesWinter Street
CrossesRoaring Brook
Coordinates44.59501, -71.50283

Physical Characteristics

MaterialConcrete
DesignFrame
Total Length30.8 ft (9.4 m)
Max Span26.9 ft (8.2 m)
Deck Width24.6 ft (7.5 m)
Deck Area70.5 sq m
Main Spans1
Year Built1956 (reconstructed 2017)

Traffic

Avg Daily Traffic585 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number019801070012200

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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