US Bridges

Csah 15 over Clearwater River

FairPosted for load

Clearwater County, Minnesota · 1.0 MI S of JCT Csah 11 · Structure no. L0797

Built
1927
98 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
37 ft
1 main span
Daily traffic
55
2011 count
Owner
County
County Highway Agency

About this bridge

Csah 15 over Clearwater River is a steel stringer/multi-beam or girder carrying Csah 15 over Clearwater River in Clearwater County, Minnesota. It was built in 1927, so it is 98 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 55 vehicles a day, projected to reach 55 by 2039. The structure is 37 ft (11.3 m) long and 22 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCsah 15
CrossesClearwater River
Location1.0 MI S of JCT Csah 11
RouteCounty Highway 15
CountyClearwater County
StateMinnesota
Coordinates47.76113, -95.32314
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating17.7 US tons
Inventory rating12.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length37 ft (11.3 m)
Longest span34 ft (10.4 m)
Deck width22 ft (6.7 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55 (2011)
Projected traffic55 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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$174 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 15 over Clearwater River built?

It was built in 1927, making it 98 years old in 2025.

What condition is Csah 15 over Clearwater 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 2024.

How much traffic does Csah 15 over Clearwater River carry?

About 55 vehicles per day (2011 count).

How long is Csah 15 over Clearwater River?

The structure is 37 ft (11.3 m) long with a longest span of 34 ft (10.4 m) and a deck 22 ft wide.

Who owns Csah 15 over Clearwater River?

It is owned by the County Highway Agency.