US Bridges

International Av over St. Croix River

Good

Washington County, Maine · 1.5M S Jct. Rtr 1 · Structure no. 6440

Built
2009
16 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
566 ft
4 main spans
Daily traffic
964
2016 count
Owner
State
State Highway Agency

About this bridge

International Av over St. Croix River is a prestressed concrete continuous stringer/multi-beam or girder carrying International Av over St. Croix River in Washington County, Maine. It was built in 2009, so it is 16 years old, younger than the Maine average of 53.7 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 964 vehicles a day, roughly 5% of them trucks, projected to reach 1,542 by 2036. The structure is 566 ft (172.4 m) long and 90 ft wide. If it were closed, the detour would be 100 mi (161 km).

CarriesInternational Av
CrossesSt. Croix River
Location1.5M S Jct. Rtr 1
RouteState Highway 0
StateMaine
Coordinates45.16102, -67.30288
Functional classRural Principal Arterial - Other

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 protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment9: Superior to present desirable criteria
Operating rating67.1 US tons
Inventory rating51.8 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadGreater than HL 93
Structure length566 ft (172.4 m)
Longest span141 ft (43 m)
Deck width90 ft (27.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic964 (2016)
Projected traffic1,542 by 2036
Trucks5%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was International Av over St. Croix River built?

It was built in 2009, making it 16 years old in 2025.

What condition is International Av over St. Croix River 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 2024.

How much traffic does International Av over St. Croix River carry?

About 964 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is International Av over St. Croix River?

The structure is 566 ft (172.4 m) long with a longest span of 141 ft (43 m) and a deck 90 ft wide.

Who owns International Av over St. Croix River?

It is owned by the State Highway Agency.