US Bridges

Nh 3A over Newfound River

Poor

Grafton County, New Hampshire · 1.2 MI N of JCT RTE 104 · Structure no. 003201000008200

Built
1924
101 years old, rebuilt 1965
Condition
Poor
inspected November 2024
Type
Tee Beam
Concrete
Length
60 ft
1 main span
Daily traffic
5,690
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 3A over Newfound River is a concrete tee beam carrying Nh 3A over Newfound River in Grafton County, New Hampshire. It was built in 1924 and reconstructed in 1965, so it is 101 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 5,690 vehicles a day, roughly 4% of them trucks, projected to reach 8,421 by 2043. The structure is 60 ft (18.3 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesNh 3A
CrossesNewfound River
Location1.2 MI N of JCT RTE 104
RouteState Highway 3A
Coordinates43.60523, -71.74246
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 8 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating28.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length60 ft (18.3 m)
Longest span57 ft (17.4 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,690 (2023)
Projected traffic8,421 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 3A over Newfound River built?

It was built in 1924, making it 101 years old in 2025. It was reconstructed in 1965.

What condition is Nh 3A over Newfound River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does Nh 3A over Newfound River carry?

About 5,690 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Nh 3A over Newfound River?

The structure is 60 ft (18.3 m) long with a longest span of 57 ft (17.4 m) and a deck 33 ft wide.

Who owns Nh 3A over Newfound River?

It is owned by the State Highway Agency.