US Bridges

Nh 25 over Halls Brook

Fair

Grafton County, New Hampshire · 200 Ft from Nh RTE 25 · Structure no. 022501050006300

Built
1964
61 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
4,826
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 25 over Halls Brook is a concrete culvert carrying Nh 25 over Halls Brook in Grafton County, New Hampshire. It was built in 1964, so it is 61 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 4,826 vehicles a day, roughly 7% of them trucks, projected to reach 7,142 by 2043. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNh 25
CrossesHalls Brook
Location200 Ft from Nh RTE 25
RouteState Highway 25
CountyGrafton County
StateNew Hampshire
Coordinates43.79503, -71.83947
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 rating87.7 US tons
Inventory rating52.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,826 (2023)
Projected traffic7,142 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Halls Brook built?

It was built in 1964, making it 61 years old in 2025.

What condition is Nh 25 over Halls 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 July 2023.

How much traffic does Nh 25 over Halls Brook carry?

About 4,826 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 25 over Halls Brook?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m).

Who owns Nh 25 over Halls Brook?

It is owned by the State Highway Agency.