US Bridges

Csah 20 over N Br Root River

Fair

Mower County, Minnesota · 0.6 MI W of JCT Csah 7 · Structure no. 50J84

Built
2009
16 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
40 ft
3 main spans
Daily traffic
190
2016 count
Owner
County
County Highway Agency

About this bridge

Csah 20 over N Br Root River is a concrete culvert carrying Csah 20 over N Br Root River in Mower County, Minnesota. It was built in 2009, so it is 16 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 190 vehicles a day, projected to reach 190 by 2039. The structure is 40 ft (12.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCsah 20
CrossesN Br Root River
Location0.6 MI W of JCT Csah 7
RouteCounty Highway 20
CountyMower County
StateMinnesota
Coordinates43.84864, -92.74263
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.6 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 25 or greater
Structure length40 ft (12.3 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic190 (2016)
Projected traffic190 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 N Br Root River built?

It was built in 2009, making it 16 years old in 2025.

What condition is Csah 20 over N Br 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 September 2023.

How much traffic does Csah 20 over N Br Root River carry?

About 190 vehicles per day (2016 count).

How long is Csah 20 over N Br Root River?

The structure is 40 ft (12.3 m) long with a longest span of 11 ft (3.5 m).

Who owns Csah 20 over N Br Root River?

It is owned by the County Highway Agency.