US Bridges

Nh 12 over Tarbell Brook

Fair

Cheshire County, New Hampshire · 0.5 MI from Mass Sl · Structure no. 008501910003700

Built
1958
67 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
21 ft
1 main span
Daily traffic
4,755
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 12 over Tarbell Brook is a concrete culvert carrying Nh 12 over Tarbell Brook in Cheshire County, New Hampshire. It was built in 1958, so it is 67 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 6 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 4,755 vehicles a day, roughly 7% of them trucks, projected to reach 7,037 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesNh 12
CrossesTarbell Brook
Location0.5 MI from Mass Sl
RouteState Highway 12
CountyCheshire County
StateNew Hampshire
Coordinates42.72313, -72.08486
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.9 US tons
Inventory rating58.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,755 (2023)
Projected traffic7,037 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemYes

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 Nh 12 over Tarbell Brook built?

It was built in 1958, making it 67 years old in 2025.

What condition is Nh 12 over Tarbell 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 2024.

How much traffic does Nh 12 over Tarbell Brook carry?

About 4,755 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 12 over Tarbell Brook?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m).

Who owns Nh 12 over Tarbell Brook?

It is owned by the State Highway Agency.