US Bridges

Nh 87 over Lamprey River

Good

Rockingham County, New Hampshire · 1.2 Mi. SE JCT Nh 125 · Structure no. 007801510006900

Built
2004
21 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
135 ft
1 main span
Daily traffic
2,689
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 87 over Lamprey River is a steel stringer/multi-beam or girder carrying Nh 87 over Lamprey River in Rockingham County, New Hampshire. It was built in 2004, so it is 21 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,689 vehicles a day, roughly 4% of them trucks, projected to reach 3,979 by 2043. The structure is 135 ft (41.3 m) long and 39 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNh 87
CrossesLamprey River
Location1.2 Mi. SE JCT Nh 125
RouteState Highway 87
CountyRockingham County
StateNew Hampshire
Coordinates43.04949, -71.0329
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating83.6 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length135 ft (41.3 m)
Longest span126 ft (38.5 m)
Deck width39 ft (11.8 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,689 (2023)
Projected traffic3,979 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nh 87 over Lamprey River built?

It was built in 2004, making it 21 years old in 2025.

What condition is Nh 87 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 Nh 87 over Lamprey River carry?

About 2,689 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Nh 87 over Lamprey River?

The structure is 135 ft (41.3 m) long with a longest span of 126 ft (38.5 m) and a deck 39 ft wide.

Who owns Nh 87 over Lamprey River?

It is owned by the State Highway Agency.