US Bridges

Nh 1A over Rye Harbor

Good

Rockingham County, New Hampshire · 2.7 MI from N Hampton Tl · Structure no. 022601450008000

Built
1986
39 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
95 ft
1 main span
Daily traffic
2,740
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 1A over Rye Harbor is a steel stringer/multi-beam or girder carrying Nh 1A over Rye Harbor in Rockingham County, New Hampshire. It was built in 1986, so it is 39 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 2,740 vehicles a day, roughly 4% of them trucks, projected to reach 4,055 by 2043. The structure is 95 ft (29 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesNh 1A
CrossesRye Harbor
Location2.7 MI from N Hampton Tl
RouteState Highway 1A
Coordinates43.00345, -70.74974
Functional classUrban Collector

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 protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating84.8 US tons
Inventory rating50.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length95 ft (29 m)
Longest span90 ft (27.4 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,740 (2023)
Projected traffic4,055 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 1A over Rye Harbor built?

It was built in 1986, making it 39 years old in 2025.

What condition is Nh 1A over Rye Harbor 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 June 2024.

How much traffic does Nh 1A over Rye Harbor carry?

About 2,740 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Nh 1A over Rye Harbor?

The structure is 95 ft (29 m) long with a longest span of 90 ft (27.4 m) and a deck 40 ft wide.

Who owns Nh 1A over Rye Harbor?

It is owned by the State Highway Agency.