US Bridges

Csah 15 over Mn 60

Fair

Watonwan County, Minnesota · 1.4 MI NE of JCT TH 4 · Structure no. 83025

Built
1977
48 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
342 ft
4 main spans
Daily traffic
235
2016 count
Owner
State
State Highway Agency

About this bridge

Csah 15 over Mn 60 is a prestressed concrete stringer/multi-beam or girder carrying Csah 15 over Mn 60 in Watonwan County, Minnesota. It was built in 1977, so it is 48 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 235 vehicles a day, projected to reach 235 by 2039. The structure is 342 ft (104.2 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCsah 15
CrossesMn 60
Location1.4 MI NE of JCT TH 4
RouteCounty Highway 15
CountyWatonwan County
StateMinnesota
Coordinates43.96236, -94.63958
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.1 US tons
Inventory rating38.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length342 ft (104.2 m)
Longest span95 ft (29 m)
Deck width36 ft (10.9 m)
Roadway width32 ft (9.8 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
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Csah 15 over Mn 60 built?

It was built in 1977, making it 48 years old in 2025.

What condition is Csah 15 over Mn 60 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 July 2024.

How much traffic does Csah 15 over Mn 60 carry?

About 235 vehicles per day (2016 count).

How long is Csah 15 over Mn 60?

The structure is 342 ft (104.2 m) long with a longest span of 95 ft (29 m) and a deck 36 ft wide.

Who owns Csah 15 over Mn 60?

It is owned by the State Highway Agency.