Structure 24700710008700 · Sullivan County, NH

Nh 11 over Sugar River

Carries Nh 11 over Sugar River, 6.1 Mi. From New London T.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT41 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

41 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.

Built195769 years old
Length41.0 ft12.5 m
Daily traffic5,968counted 2023
Last inspectedApril 2023every 24 months

Location

StateNew Hampshire
CountySullivan
Location6.1 Mi. From New London T
CarriesNh 11
CrossesSugar River
Coordinates43.37818, -72.12102

Physical Characteristics

MaterialConcrete
DesignFrame
Total Length41.0 ft (12.5 m)
Max Span36.1 ft (11 m)
Deck Width43.6 ft (13.3 m)
Deck Area166.2 sq m
Main Spans1
Year Built1957

Traffic

Avg Daily Traffic5,968 (2023)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number024700710008700

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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