US Bridges

Nh 12 over Nhrr(abd)

Fair

Cheshire County, New Hampshire · .5 MI E Westmoreland Tl · Structure no. 024900820004000

Built
1948
77 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
88 ft
1 main span
Daily traffic
8,130
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 12 over Nhrr(abd) is a steel stringer/multi-beam or girder carrying Nh 12 over Nhrr(abd) in Cheshire County, New Hampshire. It was built in 1948, so it is 77 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 8,130 vehicles a day, roughly 7% of them trucks, projected to reach 12,032 by 2043. The structure is 88 ft (26.8 m) long and 34 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesNh 12
CrossesNhrr(abd)
Location.5 MI E Westmoreland Tl
RouteState Highway 12
CountyCheshire County
StateNew Hampshire
Coordinates42.98001, -72.35441
Functional classRural Minor Arterial

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length88 ft (26.8 m)
Longest span80 ft (24.4 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,130 (2023)
Projected traffic12,032 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesPedestrian / bicycle
Detour if closed6.2 mi (10 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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nh 12 over Nhrr(abd) built?

It was built in 1948, making it 77 years old in 2025.

What condition is Nh 12 over Nhrr(abd) 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 April 2024.

How much traffic does Nh 12 over Nhrr(abd) carry?

About 8,130 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 12 over Nhrr(abd)?

The structure is 88 ft (26.8 m) long with a longest span of 80 ft (24.4 m) and a deck 34 ft wide.

Who owns Nh 12 over Nhrr(abd)?

It is owned by the State Highway Agency.