Structure 4701340016700 · Sullivan County, NH

Red Water Brook RD over Red Water Brook

Carries Red Water Brook RD over Red Water Brook, 0.3 Mi Nh 120.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT32 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

32 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 tee-beam bridge.

Built1935rebuilt 1985
Length32.2 ft9.8 m
Daily traffic96counted 2023
Last inspectedSeptember 2023every 24 months

Location

StateNew Hampshire
CountySullivan
Location0.3 Mi Nh 120
CarriesRed Water Brook RD
CrossesRed Water Brook
Coordinates43.42430, -72.33046

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length32.2 ft (9.8 m)
Max Span28.9 ft (8.8 m)
Deck Width20.0 ft (6.1 m)
Deck Area59.8 sq m
Main Spans1
Year Built1935 (reconstructed 1985)

Traffic

Avg Daily Traffic96 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number004701340016700

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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