US Bridges

I 494 over Mississippi R; UP RR

Good

Washington County, Minnesota · At Dakota/Washington CO · Structure no. 82855

Built
2008
17 years old
Condition
Good
inspected August 2023
Type
Segmental Box Girder
Prestressed Concrete Continuous
Length
1,892 ft
5 main spans
Daily traffic
51,236
2022 count
Owner
State
State Highway Agency

About this bridge

I 494 over Mississippi R; UP RR is a prestressed concrete continuous segmental box girder carrying I 494 over Mississippi R; UP RR in Washington County, Minnesota. It was built in 2008, so it is 17 years old, younger than the Minnesota average of 38.5 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 51,236 vehicles a day, roughly 7% of them trucks, projected to reach 61,000 by 2042. The structure is 1,892 ft (576.6 m) long and 86 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesI 494
CrossesMississippi R; UP RR
LocationAt Dakota/Washington CO
RouteInterstate 494
CountyWashington County
StateMinnesota
Coordinates44.88286, -93.01586
Functional classUrban Principal Arterial - Interstate

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.9 US tons
Inventory rating47.5 US tons

Structure

Structure typeSegmental Box Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length1,892 ft (576.6 m)
Longest span466 ft (142 m)
Deck width86 ft (26.2 m)
Roadway width83 ft (25.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51,236 (2022)
Projected traffic61,000 by 2042
Trucks7%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
Detour if closed6.8 mi (11 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 494 over Mississippi R; UP RR built?

It was built in 2008, making it 17 years old in 2025.

What condition is I 494 over Mississippi R; UP 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 August 2023.

How much traffic does I 494 over Mississippi R; UP RR carry?

About 51,236 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is I 494 over Mississippi R; UP RR?

The structure is 1,892 ft (576.6 m) long with a longest span of 466 ft (142 m) and a deck 86 ft wide.

Who owns I 494 over Mississippi R; UP RR?

It is owned by the State Highway Agency.