US Bridges

NH101 WB over Lamprey River

Good

Rockingham County, New Hampshire · .1 MI Raymond Tl · Structure no. 007800360004300

Built
1985
40 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
132 ft
2 main spans
Daily traffic
22,571
2023 count
Owner
State
State Highway Agency

About this bridge

NH101 WB over Lamprey River is a steel stringer/multi-beam or girder carrying NH101 WB over Lamprey River in Rockingham County, New Hampshire. It was built in 1985, so it is 40 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 22,571 vehicles a day, roughly 7% of them trucks, projected to reach 33,405 by 2043. The structure is 132 ft (40.2 m) long and 45 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNH101 WB
CrossesLamprey River
Location.1 MI Raymond Tl
RouteState Highway 101
CountyRockingham County
StateNew Hampshire
Coordinates43.03144, -71.14459
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.1 US tons
Inventory rating52.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length132 ft (40.2 m)
Longest span64 ft (19.5 m)
Deck width45 ft (13.6 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,571 (2023)
Projected traffic33,405 by 2043
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 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)
NavigationNo navigation control on waterway

Frequently asked questions

When was NH101 WB over Lamprey River built?

It was built in 1985, making it 40 years old in 2025.

What condition is NH101 WB over Lamprey River 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 April 2023.

How much traffic does NH101 WB over Lamprey River carry?

About 22,571 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is NH101 WB over Lamprey River?

The structure is 132 ft (40.2 m) long with a longest span of 64 ft (19.5 m) and a deck 45 ft wide.

Who owns NH101 WB over Lamprey River?

It is owned by the State Highway Agency.