US Bridges

Nh 16 over Nh 25

Fair

Carroll County, New Hampshire · 6.0 MI Tamworth T.L. · Structure no. 020401750023800

Built
1969
56 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
100 ft
1 main span
Daily traffic
8,081
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 16 over Nh 25 is a steel stringer/multi-beam or girder carrying Nh 16 over Nh 25 in Carroll County, New Hampshire. It was built in 1969, so it is 56 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 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 8,081 vehicles a day, roughly 7% of them trucks, projected to reach 11,959 by 2043. The structure is 100 ft (30.5 m) long and 51 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesNh 16
CrossesNh 25
Location6.0 MI Tamworth T.L.
RouteState Highway 16
CountyCarroll County
StateNew Hampshire
Coordinates43.75656, -71.14133
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span96 ft (29.3 m)
Deck width51 ft (15.4 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,081 (2023)
Projected traffic11,959 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nh 16 over Nh 25 built?

It was built in 1969, making it 56 years old in 2025.

What condition is Nh 16 over Nh 25 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 16 over Nh 25 carry?

About 8,081 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 16 over Nh 25?

The structure is 100 ft (30.5 m) long with a longest span of 96 ft (29.3 m) and a deck 51 ft wide.

Who owns Nh 16 over Nh 25?

It is owned by the State Highway Agency.