US Bridges

One ST over Piscataqua River

Poor

York County, Maine · .5 Mi. N Stateline · Structure no. 2031

Built
1938
87 years old, rebuilt 1986
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
504 ft
5 main spans
Daily traffic
10,523
2016 count
Owner
State
State Highway Agency

About this bridge

One ST over Piscataqua River is a steel continuous stringer/multi-beam or girder carrying One ST over Piscataqua River in York County, Maine. It was built in 1938 and reconstructed in 1986, so it is 87 years old, older than the Maine average of 53.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 10,523 vehicles a day, roughly 5% of them trucks, projected to reach 14,732 by 2036. The structure is 504 ft (153.6 m) long and 51 ft wide. If it were closed, the detour would be 100 mi (161 km).

CarriesOne ST
CrossesPiscataqua River
Location.5 Mi. N Stateline
RouteState Highway 1
StateMaine
Coordinates43.08336, -70.75117
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating56.4 US tons
Inventory rating43.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length504 ft (153.6 m)
Longest span110 ft (33.5 m)
Deck width51 ft (15.5 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,523 (2016)
Projected traffic14,732 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed100 mi (161 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was One ST over Piscataqua River built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1986.

What condition is One ST over Piscataqua River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does One ST over Piscataqua River carry?

About 10,523 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is One ST over Piscataqua River?

The structure is 504 ft (153.6 m) long with a longest span of 110 ft (33.5 m) and a deck 51 ft wide.

Who owns One ST over Piscataqua River?

It is owned by the State Highway Agency.