US Bridges

US 3 Nh 11 over NH107

Good

Belknap County, New Hampshire · 1.5 MI from Belmont T.L. · Structure no. 013901360002700

Built
1963
62 years old, rebuilt 1993
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
136 ft
3 main spans
Daily traffic
8,834
2023 count
Owner
State
State Highway Agency

About this bridge

US 3 Nh 11 over NH107 is a steel continuous stringer/multi-beam or girder carrying US 3 Nh 11 over NH107 in Belknap County, New Hampshire. It was built in 1963 and reconstructed in 1993, so it is 62 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 8,834 vehicles a day, roughly 7% of them trucks, projected to reach 13,074 by 2043. The structure is 136 ft (41.5 m) long and 54 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesUS 3 Nh 11
CrossesNH107
Location1.5 MI from Belmont T.L.
RouteU.S. Route 3
Coordinates43.51306, -71.45437
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
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 rating77.4 US tons
Inventory rating46.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length136 ft (41.5 m)
Longest span58 ft (17.7 m)
Deck width54 ft (16.4 m)
Roadway width51 ft (15.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,834 (2023)
Projected traffic13,074 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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 US 3 Nh 11 over NH107 built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1993.

What condition is US 3 Nh 11 over NH107 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 November 2024.

How much traffic does US 3 Nh 11 over NH107 carry?

About 8,834 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 3 Nh 11 over NH107?

The structure is 136 ft (41.5 m) long with a longest span of 58 ft (17.7 m) and a deck 54 ft wide.

Who owns US 3 Nh 11 over NH107?

It is owned by the State Highway Agency.