US Bridges

Nh 12 over S Branch Ashuelot River

Fair

Cheshire County, New Hampshire · 2.2MI to Troy Center · Structure no. 025800820012800

Built
1983
42 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
34 ft
1 main span
Daily traffic
8,976
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 12 over S Branch Ashuelot River is a concrete culvert carrying Nh 12 over S Branch Ashuelot River in Cheshire County, New Hampshire. It was built in 1983, so it is 42 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 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 8,976 vehicles a day, roughly 7% of them trucks, projected to reach 13,284 by 2043. The structure is 34 ft (10.4 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesNh 12
CrossesS Branch Ashuelot River
Location2.2MI to Troy Center
RouteState Highway 12
CountyCheshire County
StateNew Hampshire
Coordinates42.85491, -72.1978
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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length34 ft (10.4 m)
Longest span34 ft (10.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,976 (2023)
Projected traffic13,284 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 S Branch Ashuelot River built?

It was built in 1983, making it 42 years old in 2025.

What condition is Nh 12 over S Branch Ashuelot River 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 Nh 12 over S Branch Ashuelot River carry?

About 8,976 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 12 over S Branch Ashuelot River?

The structure is 34 ft (10.4 m) long with a longest span of 34 ft (10.4 m).

Who owns Nh 12 over S Branch Ashuelot River?

It is owned by the State Highway Agency.