US Bridges

Csah 25 over Bear River

Fair

St. Louis County, Minnesota · 2.5 MI N of JCT CSAH66 · Structure no. 7688

Built
1941
84 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
365
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 25 over Bear River is a concrete culvert carrying Csah 25 over Bear River in St. Louis County, Minnesota. It was built in 1941, so it is 84 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 365 vehicles a day, projected to reach 330 by 2039. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCsah 25
CrossesBear River
Location2.5 MI N of JCT CSAH66
RouteCounty Highway 25
CountySt. Louis County
StateMinnesota
Coordinates47.60865, -92.76299
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.4 US tons
Inventory rating31.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 20
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic365 (2019)
Projected traffic330 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$31 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 25 over Bear River built?

It was built in 1941, making it 84 years old in 2025.

What condition is Csah 25 over Bear 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 August 2023.

How much traffic does Csah 25 over Bear River carry?

About 365 vehicles per day (2019 count).

How long is Csah 25 over Bear River?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).

Who owns Csah 25 over Bear River?

It is owned by the County Highway Agency.