Structure 24700940010000 · Sullivan County, NH

Lower Main Street over Sugar River

Carries Lower Main Street over Sugar River, 0.3 Mi Fr Nh RTE 11.

Overall conditionGood

Set by its lowest-rated component: Substructure at 8 of 9.

How ratings work
Deck9/9 · Excellent
Superstructure9/9 · Excellent
Substructuresets the rating8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT26 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 9/9Superstructure 9/9Substructure 8/9 · sets the rating

26 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 2016
Length25.6 ft7.8 m
Daily traffic557counted 2023
Last inspectedSeptember 2024every 24 months

Location

StateNew Hampshire
CountySullivan
Location0.3 Mi Fr Nh RTE 11
CarriesLower Main Street
CrossesSugar River
Coordinates43.38644, -72.09847

Physical Characteristics

MaterialWood or Timber
DesignSlab
Total Length25.6 ft (7.8 m)
Max Span23.6 ft (7.2 m)
Deck Width28.9 ft (8.8 m)
Deck Area68.6 sq m
Main Spans1
Year Built1900 (reconstructed 2016)

Traffic

Avg Daily Traffic557 (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 Number024700940010000

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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