US Bridges

US 3 Nh 11 over US 3 Nh 11

Fair

Belknap County, New Hampshire · 3.4 MI from Laconia T.L. · Structure no. 009101140006600

Built
1965
60 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
91 ft
1 main span
Daily traffic
4,578
2023 count
Owner
State
State Highway Agency

About this bridge

US 3 Nh 11 over US 3 Nh 11 is a steel stringer/multi-beam or girder carrying US 3 Nh 11 over US 3 Nh 11 in Belknap County, New Hampshire. It was built in 1965, so it is 60 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 4,578 vehicles a day, roughly 7% of them trucks, projected to reach 6,775 by 2043. The structure is 91 ft (27.7 m) long and 54 ft wide.

Location

Open in Google Maps
CarriesUS 3 Nh 11
CrossesUS 3 Nh 11
Location3.4 MI from Laconia T.L.
RouteU.S. Route 3
CountyBelknap County
StateNew Hampshire
Coordinates43.56641, -71.4342
Functional classUrban Other Principal 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31 US tons
Inventory rating18.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length91 ft (27.7 m)
Longest span84 ft (25.6 m)
Deck width54 ft (16.4 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,578 (2023)
Projected traffic6,775 by 2043
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 US 3 Nh 11 built?

It was built in 1965, making it 60 years old in 2025.

What condition is US 3 Nh 11 over US 3 Nh 11 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 May 2023.

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

About 4,578 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 3 Nh 11 over US 3 Nh 11?

The structure is 91 ft (27.7 m) long with a longest span of 84 ft (25.6 m) and a deck 54 ft wide.

Who owns US 3 Nh 11 over US 3 Nh 11?

It is owned by the State Highway Agency.