US Bridges

Long Island Road over Lake Winnipesaukee

Good

Carroll County, New Hampshire · 4.1 MI from Hanson RD · Structure no. 017601920010100

Built
1988
37 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
141 ft
1 main span
Daily traffic
1,237
2023 count
Owner
State
State Highway Agency

About this bridge

Long Island Road over Lake Winnipesaukee is a steel stringer/multi-beam or girder carrying Long Island Road over Lake Winnipesaukee in Carroll County, New Hampshire. It was built in 1988, so it is 37 years old, younger 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 1,237 vehicles a day, roughly 4% of them trucks, projected to reach 1,830 by 2043. The structure is 141 ft (43 m) long and 45 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesLong Island Road
CrossesLake Winnipesaukee
Location4.1 MI from Hanson RD
RouteState Highway 0
CountyCarroll County
StateNew Hampshire
Coordinates43.66511, -71.34802
Functional classRural Minor Collector

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.3 US tons
Inventory rating49.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length141 ft (43 m)
Longest span135 ft (41.1 m)
Deck width45 ft (13.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,237 (2023)
Projected traffic1,830 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$314,000 (2025 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Long Island Road over Lake Winnipesaukee built?

It was built in 1988, making it 37 years old in 2025.

What condition is Long Island Road over Lake Winnipesaukee 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 July 2024.

How much traffic does Long Island Road over Lake Winnipesaukee carry?

About 1,237 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Long Island Road over Lake Winnipesaukee?

The structure is 141 ft (43 m) long with a longest span of 135 ft (41.1 m) and a deck 45 ft wide.

Who owns Long Island Road over Lake Winnipesaukee?

It is owned by the State Highway Agency.