US Bridges

Nh 27 over Lamprey River

Fair

Rockingham County, New Hampshire · .65 Mi. SE Raymond Tl · Structure no. 007800510005300

Built
1935
90 years old
Condition
Fair
inspected April 2023
Type
Frame
Concrete
Length
45 ft
1 main span
Daily traffic
4,960
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 27 over Lamprey River is a concrete frame carrying Nh 27 over Lamprey River in Rockingham County, New Hampshire. It was built in 1935, so it is 90 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 4,960 vehicles a day, roughly 10% of them trucks, projected to reach 7,340 by 2043. The structure is 45 ft (13.8 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNh 27
CrossesLamprey River
Location.65 Mi. SE Raymond Tl
RouteState Highway 27
CountyRockingham County
StateNew Hampshire
Coordinates43.03928, -71.13016
Functional classUrban 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.4 US tons
Inventory rating23.6 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length45 ft (13.8 m)
Longest span39 ft (11.8 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,960 (2023)
Projected traffic7,340 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Nh 27 over Lamprey River built?

It was built in 1935, making it 90 years old in 2025.

What condition is Nh 27 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 April 2023.

How much traffic does Nh 27 over Lamprey River carry?

About 4,960 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Nh 27 over Lamprey River?

The structure is 45 ft (13.8 m) long with a longest span of 39 ft (11.8 m) and a deck 34 ft wide.

Who owns Nh 27 over Lamprey River?

It is owned by the State Highway Agency.