US Bridges

Csah 6 over Mn 15

Fair

Stearns County, Minnesota · 0.5 MI N of JCT TH 94 · Structure no. 73858

Built
1976
49 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
296 ft
4 main spans
Daily traffic
1,209
2022 count
Owner
State
State Highway Agency

About this bridge

Csah 6 over Mn 15 is a prestressed concrete stringer/multi-beam or girder carrying Csah 6 over Mn 15 in Stearns County, Minnesota. It was built in 1976, so it is 49 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 1,209 vehicles a day, roughly 2% of them trucks, projected to reach 1,500 by 2042. The structure is 296 ft (90.1 m) long and 50 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCsah 6
CrossesMn 15
Location0.5 MI N of JCT TH 94
RouteCounty Highway 6
CountyStearns County
StateMinnesota
Coordinates45.50391, -94.23524
Functional classUrban 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.9 US tons
Inventory rating37.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length296 ft (90.1 m)
Longest span90 ft (27.3 m)
Deck width50 ft (15.3 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,209 (2022)
Projected traffic1,500 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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 6 over Mn 15 built?

It was built in 1976, making it 49 years old in 2025.

What condition is Csah 6 over Mn 15 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 May 2024.

How much traffic does Csah 6 over Mn 15 carry?

About 1,209 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Csah 6 over Mn 15?

The structure is 296 ft (90.1 m) long with a longest span of 90 ft (27.3 m) and a deck 50 ft wide.

Who owns Csah 6 over Mn 15?

It is owned by the State Highway Agency.