US Bridges

Csah 18 over S Fk Roseau River

Good

Roseau County, Minnesota · 1.6 MI N of JCT Csah 18 · Structure no. 93538

Built
1981
44 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
35
2016 count
Owner
County
County Highway Agency

About this bridge

Csah 18 over S Fk Roseau River is a concrete culvert carrying Csah 18 over S Fk Roseau River in Roseau County, Minnesota. It was built in 1981, so it is 44 years old, older 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 35 vehicles a day, projected to reach 35 by 2039. The structure is 31 ft (9.5 m) long. If it were closed, the detour would be 6.8 mi (11 km).

CarriesCsah 18
CrossesS Fk Roseau River
Location1.6 MI N of JCT Csah 18
RouteCounty Highway 18
Coordinates48.57668, -95.69004
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating39.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length31 ft (9.5 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2016)
Projected traffic35 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 18 over S Fk Roseau River built?

It was built in 1981, making it 44 years old in 2025.

What condition is Csah 18 over S Fk Roseau 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 October 2023.

How much traffic does Csah 18 over S Fk Roseau River carry?

About 35 vehicles per day (2016 count).

How long is Csah 18 over S Fk Roseau River?

The structure is 31 ft (9.5 m) long with a longest span of 14 ft (4.3 m).

Who owns Csah 18 over S Fk Roseau River?

It is owned by the County Highway Agency.