US Bridges

NH152 over Lamprey River

Fair

Strafford County, New Hampshire · 1.0 MI from Newmarket Tl · Structure no. 014501020004600

Built
1933
92 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
136 ft
2 main spans
Daily traffic
1,470
2023 count
Owner
State
State Highway Agency

About this bridge

NH152 over Lamprey River is a steel stringer/multi-beam or girder carrying NH152 over Lamprey River in Strafford County, New Hampshire. It was built in 1933, so it is 92 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 5 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 1,470 vehicles a day, roughly 4% of them trucks, projected to reach 2,175 by 2043. The structure is 136 ft (41.5 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNH152
CrossesLamprey River
Location1.0 MI from Newmarket Tl
RouteState Highway 152
CountyStrafford County
StateNew Hampshire
Coordinates43.09126, -71.00692
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating37 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length136 ft (41.5 m)
Longest span51 ft (15.5 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,470 (2023)
Projected traffic2,175 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

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 NH152 over Lamprey River built?

It was built in 1933, making it 92 years old in 2025.

What condition is NH152 over Lamprey River 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 July 2024.

How much traffic does NH152 over Lamprey River carry?

About 1,470 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH152 over Lamprey River?

The structure is 136 ft (41.5 m) long with a longest span of 51 ft (15.5 m) and a deck 24 ft wide.

Who owns NH152 over Lamprey River?

It is owned by the State Highway Agency.