US Bridges

I 94 over ST Croix River; ST

Fair

Washington County, Minnesota · At Wisconsin State Line · Structure no. 82800

Built
1994
31 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
2,382 ft
9 main spans
Daily traffic
36,376
2022 count
Owner
State
State Highway Agency

About this bridge

I 94 over ST Croix River; ST is a steel continuous stringer/multi-beam or girder carrying I 94 over ST Croix River; ST in Washington County, Minnesota. It was built in 1994, so it is 31 years old, younger than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 36,376 vehicles a day, roughly 12% of them trucks, projected to reach 42,000 by 2042. The structure is 2,382 ft (726 m) long and 80 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesI 94
CrossesST Croix River; ST
LocationAt Wisconsin State Line
RouteInterstate 94
Coordinates44.96255, -92.76221
Functional classUrban Principal Arterial - Interstate

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.8 US tons
Inventory rating47.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length2,382 ft (726 m)
Longest span390 ft (118.9 m)
Deck width80 ft (24.4 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,376 (2022)
Projected traffic42,000 by 2042
Trucks12%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was I 94 over ST Croix River; ST built?

It was built in 1994, making it 31 years old in 2025.

What condition is I 94 over ST Croix River; ST 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 June 2024.

How much traffic does I 94 over ST Croix River; ST carry?

About 36,376 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is I 94 over ST Croix River; ST?

The structure is 2,382 ft (726 m) long with a longest span of 390 ft (118.9 m) and a deck 80 ft wide.

Who owns I 94 over ST Croix River; ST?

It is owned by the State Highway Agency.