Structure 14802470025500 · Grafton County, NH

Nh112 over Hancock Brook

Carries Nh112 over Hancock Brook, 4.0 Mi E Of Livermore Tl.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure6/9 · Satisfactory
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 FT68 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9Substructure 5/9 · sets the rating

68 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.

Built1938rebuilt 1993
Length67.9 ft20.7 m
Daily traffic3,107counted 2023
Last inspectedJune 2023every 24 months

Location

StateNew Hampshire
CountyGrafton
Location4.0 Mi E Of Livermore Tl
CarriesNh112
CrossesHancock Brook
Coordinates44.03569, -71.52975

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length67.9 ft (20.7 m)
Max Span63.0 ft (19.2 m)
Deck Width30.8 ft (9.4 m)
Deck Area194.6 sq m
Main Spans1
Year Built1938 (reconstructed 1993)

Traffic

Avg Daily Traffic3,107 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number014802470025500

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.

Nearby Bridges