US Bridges

NH112 over Hancock Brook

Fair

Grafton County, New Hampshire · 3.1 MI E of Livermore Tl · Structure no. 014802610026400

Built
1942
83 years old, rebuilt 1993
Condition
Fair
inspected June 2023
Type
Frame
Concrete
Length
30 ft
1 main span
Daily traffic
3,107
2023 count
Owner
State
State Highway Agency

About this bridge

NH112 over Hancock Brook is a concrete frame carrying NH112 over Hancock Brook in Grafton County, New Hampshire. It was built in 1942 and reconstructed in 1993, so it is 83 years old, older than the New Hampshire average of 56.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 3,107 vehicles a day, roughly 4% of them trucks, projected to reach 4,598 by 2043. The structure is 30 ft (9.1 m) long and 31 ft wide. If it were closed, the detour would be 55.9 mi (90 km).

Location

Open in Google Maps
CarriesNH112
CrossesHancock Brook
Location3.1 MI E of Livermore Tl
RouteState Highway 112
CountyGrafton County
StateNew Hampshire
Coordinates44.02963, -71.51924
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57.1 US tons
Inventory rating32.8 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length30 ft (9.1 m)
Longest span25 ft (7.6 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,107 (2023)
Projected traffic4,598 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed55.9 mi (90 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$314,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NH112 over Hancock Brook built?

It was built in 1942, making it 83 years old in 2025. It was reconstructed in 1993.

What condition is NH112 over Hancock Brook in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does NH112 over Hancock Brook carry?

About 3,107 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH112 over Hancock Brook?

The structure is 30 ft (9.1 m) long with a longest span of 25 ft (7.6 m) and a deck 31 ft wide.

Who owns NH112 over Hancock Brook?

It is owned by the State Highway Agency.