Structure 9800830009600 · Sullivan County, NH

Nh 10 over S Branch Sugar River

Carries Nh 10 over S Branch Sugar River, 0.6 Mi From Lempster Tl.

Overall conditionGood

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

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT33 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

33 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.

Built1928rebuilt 2004
Length33.5 ft10.2 m
Daily traffic1,915counted 2023
Last inspectedMarch 2024every 24 months

Location

StateNew Hampshire
CountySullivan
Location0.6 Mi From Lempster Tl
CarriesNh 10
CrossesS Branch Sugar River
Coordinates43.28716, -72.14749

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length33.5 ft (10.2 m)
Max Span31.5 ft (9.6 m)
Deck Width35.4 ft (10.8 m)
Deck Area110.2 sq m
Main Spans1
Year Built1928 (reconstructed 2004)

Traffic

Avg Daily Traffic1,915 (2023)
Truck Traffic12%
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 Number009800830009600

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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