US Bridges

NH112 Kancamagus over Oliverian Brook

Good

Carroll County, New Hampshire · 1.7 MI from Waterville · Structure no. 000200610014700

Built
1963
62 years old, rebuilt 1999
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
45 ft
1 main span
Daily traffic
2,710
2023 count
Owner
State
State Highway Agency

About this bridge

NH112 Kancamagus over Oliverian Brook is a prestressed concrete box beam or girders - multiple carrying NH112 Kancamagus over Oliverian Brook in Carroll County, New Hampshire. It was built in 1963 and reconstructed in 1999, so it is 62 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,710 vehicles a day, roughly 4% of them trucks, projected to reach 4,010 by 2043. The structure is 45 ft (13.6 m) long and 36 ft wide. If it were closed, the detour would be 55.9 mi (90 km).

CarriesNH112 Kancamagus
CrossesOliverian Brook
Location1.7 MI from Waterville
RouteState Highway 112
Coordinates43.99594, -71.3434
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92 US tons
Inventory rating46 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length45 ft (13.6 m)
Longest span43 ft (13.1 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,710 (2023)
Projected traffic4,010 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 Kancamagus over Oliverian Brook built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1999.

What condition is NH112 Kancamagus over Oliverian Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does NH112 Kancamagus over Oliverian Brook carry?

About 2,710 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH112 Kancamagus over Oliverian Brook?

The structure is 45 ft (13.6 m) long with a longest span of 43 ft (13.1 m) and a deck 36 ft wide.

Who owns NH112 Kancamagus over Oliverian Brook?

It is owned by the State Highway Agency.