US Bridges

Csah 20 over Roseau River

Fair

Roseau County, Minnesota · 1.4 MI W of JCT Csah 9 · Structure no. 68523

Built
1991
34 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Prestressed Concrete
Length
84 ft
3 main spans
Daily traffic
235
2016 count
Owner
County
County Highway Agency

About this bridge

Csah 20 over Roseau River is a prestressed concrete tee beam carrying Csah 20 over Roseau River in Roseau County, Minnesota. It was built in 1991, so it is 34 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 235 vehicles a day, projected to reach 235 by 2039. The structure is 84 ft (25.6 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCsah 20
CrossesRoseau River
Location1.4 MI W of JCT Csah 9
RouteCounty Highway 20
CountyRoseau County
StateMinnesota
Coordinates48.69925, -95.63554
Functional classRural Minor Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating55 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 25 or greater
Structure length84 ft (25.6 m)
Longest span32 ft (9.8 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic235 (2016)
Projected traffic235 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Csah 20 over Roseau River built?

It was built in 1991, making it 34 years old in 2025.

What condition is Csah 20 over Roseau River 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 October 2023.

How much traffic does Csah 20 over Roseau River carry?

About 235 vehicles per day (2016 count).

How long is Csah 20 over Roseau River?

The structure is 84 ft (25.6 m) long with a longest span of 32 ft (9.8 m) and a deck 36 ft wide.

Who owns Csah 20 over Roseau River?

It is owned by the County Highway Agency.