US Bridges

Csah 8 over Mayo Run

Good

Olmsted County, Minnesota · 0.7 MI S of JCT Csah 22 · Structure no. 55J82

Built
2013
12 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
47 ft
2 main spans
Daily traffic
3,900
2014 count
Owner
County
County Highway Agency

About this bridge

Csah 8 over Mayo Run is a concrete culvert carrying Csah 8 over Mayo Run in Olmsted County, Minnesota. It was built in 2013, so it is 12 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,900 vehicles a day, projected to reach 3,998 by 2034. The structure is 47 ft (14.4 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCsah 8
CrossesMayo Run
Location0.7 MI S of JCT Csah 22
RouteCounty Highway 8
CountyOlmsted County
StateMinnesota
Coordinates43.98797, -92.50372
Functional classUrban 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.
Culvert8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable 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 spans2
Design loadHS 25 or greater
Structure length47 ft (14.4 m)
Longest span19 ft (5.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,900 (2014)
Projected traffic3,998 by 2034
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 8 over Mayo Run built?

It was built in 2013, making it 12 years old in 2025.

What condition is Csah 8 over Mayo Run 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 8 over Mayo Run carry?

About 3,900 vehicles per day (2014 count).

How long is Csah 8 over Mayo Run?

The structure is 47 ft (14.4 m) long with a longest span of 19 ft (5.7 m).

Who owns Csah 8 over Mayo Run?

It is owned by the County Highway Agency.