US Bridges

Nh 12 over Beaver Brook

Good

Cheshire County, New Hampshire · .97 MI NW Swanzey Tl · Structure no. 013601370005900

Built
2019
6 years old
Condition
Good
inspected July 2023
Type
Frame
Concrete
Length
28 ft
2 main spans
Daily traffic
17,831
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nh 12 over Beaver Brook is a concrete frame carrying Nh 12 over Beaver Brook in Cheshire County, New Hampshire. It was built in 2019, so it is 6 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 17,831 vehicles a day, roughly 5% of them trucks, projected to reach 26,389 by 2043. The structure is 28 ft (8.5 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNh 12
CrossesBeaver Brook
Location.97 MI NW Swanzey Tl
RouteState Highway 12
CountyCheshire County
StateNew Hampshire
Coordinates42.92086, -72.27556
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length28 ft (8.5 m)
Longest span12 ft (3.7 m)
Deck width80 ft (24.4 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,831 (2023)
Projected traffic26,389 by 2043
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
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 Nh 12 over Beaver Brook built?

It was built in 2019, making it 6 years old in 2025.

What condition is Nh 12 over Beaver 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 July 2023.

How much traffic does Nh 12 over Beaver Brook carry?

About 17,831 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Nh 12 over Beaver Brook?

The structure is 28 ft (8.5 m) long with a longest span of 12 ft (3.7 m) and a deck 80 ft wide.

Who owns Nh 12 over Beaver Brook?

It is owned by the City or Municipal Highway Agency.