Structure 24701110009900 · Sullivan County, NH

Main Street over Sugar River

Carries Main Street over Sugar River, 115 Ft From Garnett ST.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT30 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

30 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.

Built1920rebuilt 1992
Length29.9 ft9.1 m
Daily traffic2,301counted 2023
Last inspectedSeptember 2024every 24 months

Location

StateNew Hampshire
CountySullivan
Location115 Ft From Garnett ST
CarriesMain Street
CrossesSugar River
Coordinates43.38554, -72.08142

Physical Characteristics

MaterialWood or Timber
DesignSlab
Total Length29.9 ft (9.1 m)
Max Span27.9 ft (8.5 m)
Deck Width32.2 ft (9.8 m)
Deck Area89.2 sq m
Main Spans1
Year Built1920 (reconstructed 1992)

Traffic

Avg Daily Traffic2,301 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number024701110009900

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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