US Bridges

US 1 Bypass over Piscataqua River RR

Good

Rockingham County, New Hampshire · Maine Stateline · Structure no. 021702500011000

Built
2017
8 years old
Condition
Good
inspected April 2023
Type
Movable - Lift
Steel
Length
2,784 ft
1 main span
Daily traffic
11,064
2023 count
Owner
Toll Authority
Local Toll Authority

About this bridge

US 1 Bypass over Piscataqua River RR is a steel movable - lift carrying US 1 Bypass over Piscataqua River RR in Rockingham County, New Hampshire. It was built in 2017, so it is 8 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 11,064 vehicles a day, roughly 5% of them trucks, projected to reach 16,374 by 2043. The structure is 2,784 ft (848.6 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 1 Bypass
CrossesPiscataqua River RR
LocationMaine Stateline
RouteU.S. Route 1BYP
CountyRockingham County
StateNew Hampshire
Coordinates43.08662, -70.76114
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating41.7 US tons

Structure

Structure typeMovable - Lift
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+10 approach)
Design loadHL 93
Structure length2,784 ft (848.6 m)
Longest span335 ft (102.1 m)
Deck width37 ft (11.3 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,064 (2023)
Projected traffic16,374 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and railroad
CrossesHighway, waterway and railroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerLocal Toll Authority
Maintained byLocal Toll Authority
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)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US 1 Bypass over Piscataqua River RR built?

It was built in 2017, making it 8 years old in 2025.

What condition is US 1 Bypass over Piscataqua River RR 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 US 1 Bypass over Piscataqua River RR carry?

About 11,064 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is US 1 Bypass over Piscataqua River RR?

The structure is 2,784 ft (848.6 m) long with a longest span of 335 ft (102.1 m) and a deck 37 ft wide.

Who owns US 1 Bypass over Piscataqua River RR?

It is owned by the Local Toll Authority.