Structure 25401100010600 · Grafton County, NH

Thornton Gore RD over Eastman Brook

Carries Thornton Gore RD over Eastman Brook, 0.3 Mi From Woodstock Tl.

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 FT87 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

87 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 multi-beam bridge.

Built198838 years old
Length86.9 ft26.5 m
Daily traffic222counted 2023
Last inspectedMay 2024every 24 months

Location

StateNew Hampshire
CountyGrafton
Location0.3 Mi From Woodstock Tl
CarriesThornton Gore RD
CrossesEastman Brook
Coordinates43.96748, -71.66486

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length86.9 ft (26.5 m)
Max Span80.1 ft (24.4 m)
Deck Width32.5 ft (9.9 m)
Deck Area262.4 sq m
Main Spans1
Year Built1988

Traffic

Avg Daily Traffic222 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number025401100010600

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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