US Bridges

Csah 20 over I 494

Fair

Washington County, Minnesota · .2 MI NE of JCT TH 494;61 · Structure no. 82865

Built
2003
22 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
265 ft
2 main spans
Daily traffic
14,300
2018 count
Owner
State
State Highway Agency

About this bridge

Csah 20 over I 494 is a prestressed concrete stringer/multi-beam or girder carrying Csah 20 over I 494 in Washington County, Minnesota. It was built in 2003, so it is 22 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 5 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 14,300 vehicles a day, projected to reach 13,100 by 2038. The structure is 265 ft (80.8 m) long and 101 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCsah 20
CrossesI 494
Location.2 MI NE of JCT TH 494;61
RouteCounty Highway 20
CountyWashington County
StateMinnesota
Coordinates44.88855, -93.00144
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length265 ft (80.8 m)
Longest span136 ft (41.5 m)
Deck width101 ft (30.9 m)
Roadway width89 ft (27 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,300 (2018)
Projected traffic13,100 by 2038
Trucks—
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Csah 20 over I 494 built?

It was built in 2003, making it 22 years old in 2025.

What condition is Csah 20 over I 494 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 September 2023.

How much traffic does Csah 20 over I 494 carry?

About 14,300 vehicles per day (2018 count).

How long is Csah 20 over I 494?

The structure is 265 ft (80.8 m) long with a longest span of 136 ft (41.5 m) and a deck 101 ft wide.

Who owns Csah 20 over I 494?

It is owned by the State Highway Agency.