US Bridges

Csah 21 over N Br S Fk Root River

Fair

Fillmore County, Minnesota · 0.7 MI N of JCT Csah 18 · Structure no. 93143

Built
1975
50 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
53 ft
3 main spans
Daily traffic
620
2013 count
Owner
County
County Highway Agency

About this bridge

Csah 21 over N Br S Fk Root River is a concrete culvert carrying Csah 21 over N Br S Fk Root River in Fillmore County, Minnesota. It was built in 1975, so it is 50 years old, older 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 620 vehicles a day, projected to reach 620 by 2039. The structure is 53 ft (16.2 m) long. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesCsah 21
CrossesN Br S Fk Root River
Location0.7 MI N of JCT Csah 18
RouteCounty Highway 21
CountyFillmore County
StateMinnesota
Coordinates43.60631, -91.92976
Functional classRural Major 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length53 ft (16.2 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 traffic620 (2013)
Projected traffic620 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 21 over N Br S Fk Root River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Csah 21 over N Br S Fk Root 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 April 2024.

How much traffic does Csah 21 over N Br S Fk Root River carry?

About 620 vehicles per day (2013 count).

How long is Csah 21 over N Br S Fk Root River?

The structure is 53 ft (16.2 m) long with a longest span of 14 ft (4.3 m).

Who owns Csah 21 over N Br S Fk Root River?

It is owned by the County Highway Agency.