US Bridges

Nh 25 over North Branch River

Fair

Grafton County, New Hampshire · 1.0 MI from Benton Tl · Structure no. 011700740005100

Built
1928
97 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
1,072
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 25 over North Branch River is a steel stringer/multi-beam or girder carrying Nh 25 over North Branch River in Grafton County, New Hampshire. It was built in 1928, so it is 97 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 1,072 vehicles a day, roughly 4% of them trucks, projected to reach 1,586 by 2043. The structure is 32 ft (9.8 m) long and 28 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesNh 25
CrossesNorth Branch River
Location1.0 MI from Benton Tl
RouteState Highway 25
CountyGrafton County
StateNew Hampshire
Coordinates44.02671, -71.97062
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41.9 US tons
Inventory rating25.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,072 (2023)
Projected traffic1,586 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nh 25 over North Branch River built?

It was built in 1928, making it 97 years old in 2025.

What condition is Nh 25 over North Branch 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 25 over North Branch River carry?

About 1,072 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Nh 25 over North Branch River?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns Nh 25 over North Branch River?

It is owned by the State Highway Agency.