US Bridges

Nh 25 over Outlet Loon Pond

Good

Carroll County, New Hampshire · 1.5 MI E Nh-Me State Line · Structure no. 008902050004100

Built
1941
84 years old, rebuilt 2020
Condition
Good
inspected April 2024
Type
Frame
Concrete
Length
22 ft
1 main span
Daily traffic
2,854
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 25 over Outlet Loon Pond is a concrete frame carrying Nh 25 over Outlet Loon Pond in Carroll County, New Hampshire. It was built in 1941 and reconstructed in 2020, so it is 84 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,854 vehicles a day, roughly 7% of them trucks, projected to reach 4,223 by 2043. The structure is 22 ft (6.7 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNh 25
CrossesOutlet Loon Pond
Location1.5 MI E Nh-Me State Line
RouteState Highway 25
CountyCarroll County
StateNew Hampshire
Coordinates43.79541, -71.01525
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.5 US tons
Inventory rating32 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length22 ft (6.7 m)
Longest span20 ft (6.1 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,854 (2023)
Projected traffic4,223 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Outlet Loon Pond built?

It was built in 1941, making it 84 years old in 2025. It was reconstructed in 2020.

What condition is Nh 25 over Outlet Loon Pond in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does Nh 25 over Outlet Loon Pond carry?

About 2,854 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 25 over Outlet Loon Pond?

The structure is 22 ft (6.7 m) long with a longest span of 20 ft (6.1 m) and a deck 34 ft wide.

Who owns Nh 25 over Outlet Loon Pond?

It is owned by the State Highway Agency.