US Bridges

US 3 Nh 11 over Nh 11A

Fair

Belknap County, New Hampshire · 0.7 MI from Laconia Tl · Structure no. 009101600005300

Built
1965
60 years old, rebuilt 2016
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
81 ft
1 main span
Daily traffic
9,349
2023 count
Owner
State
State Highway Agency

About this bridge

US 3 Nh 11 over Nh 11A is a steel stringer/multi-beam or girder carrying US 3 Nh 11 over Nh 11A in Belknap County, New Hampshire. It was built in 1965 and reconstructed in 2016, 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 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 9,349 vehicles a day, roughly 7% of them trucks, projected to reach 13,836 by 2043. The structure is 81 ft (24.8 m) long and 50 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesUS 3 Nh 11
CrossesNh 11A
Location0.7 MI from Laconia Tl
RouteU.S. Route 3
CountyBelknap County
StateNew Hampshire
Coordinates43.53132, -71.44227
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.6 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length81 ft (24.8 m)
Longest span68 ft (20.7 m)
Deck width50 ft (15.2 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,349 (2023)
Projected traffic13,836 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 Nh 11A built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2016.

What condition is US 3 Nh 11 over Nh 11A 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 Nh 11A carry?

About 9,349 vehicles per day (2023 count), of which roughly 7% are trucks.

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

The structure is 81 ft (24.8 m) long with a longest span of 68 ft (20.7 m) and a deck 50 ft wide.

Who owns US 3 Nh 11 over Nh 11A?

It is owned by the State Highway Agency.