US Bridges

NH101 EB over Lamprey River

Good

Rockingham County, New Hampshire · 4.7MI E of Candia Tl · Structure no. 021901440010300

Built
1983
42 years old, rebuilt 2000
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
125 ft
1 main span
Daily traffic
21,383
2023 count
Owner
State
State Highway Agency

About this bridge

NH101 EB over Lamprey River is a steel stringer/multi-beam or girder carrying NH101 EB over Lamprey River in Rockingham County, New Hampshire. It was built in 1983 and reconstructed in 2000, so it is 42 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 21,383 vehicles a day, roughly 7% of them trucks, projected to reach 31,646 by 2043. The structure is 125 ft (38 m) long and 45 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNH101 EB
CrossesLamprey River
Location4.7MI E of Candia Tl
RouteState Highway 101
Coordinates43.02938, -71.16632
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.5 US tons
Inventory rating51.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length125 ft (38 m)
Longest span120 ft (36.6 m)
Deck width45 ft (13.6 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,383 (2023)
Projected traffic31,646 by 2043
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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)
NavigationNo navigation control on waterway

Frequently asked questions

When was NH101 EB over Lamprey River built?

It was built in 1983, making it 42 years old in 2025. It was reconstructed in 2000.

What condition is NH101 EB 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 2024.

How much traffic does NH101 EB over Lamprey River carry?

About 21,383 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is NH101 EB over Lamprey River?

The structure is 125 ft (38 m) long with a longest span of 120 ft (36.6 m) and a deck 45 ft wide.

Who owns NH101 EB over Lamprey River?

It is owned by the State Highway Agency.