US Bridges

Csah 4 over Beaver River

Fair

St. Louis County, Minnesota · 0.2 MI S of JCT CR260 · Structure no. 7636

Built
1950
75 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
5,900
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 4 over Beaver River is a concrete culvert carrying Csah 4 over Beaver River in St. Louis County, Minnesota. It was built in 1950, so it is 75 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.

It carries about 5,900 vehicles a day, roughly 9% of them trucks, projected to reach 5,500 by 2039. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCsah 4
CrossesBeaver River
Location0.2 MI S of JCT CR260
RouteCounty Highway 4
Coordinates46.92126, -92.15382
Functional classRural Minor Arterial

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating65.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 20
Structure length22 ft (6.7 m)
Longest span10 ft (3.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,900 (2019)
Projected traffic5,500 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 4 over Beaver River built?

It was built in 1950, making it 75 years old in 2025.

What condition is Csah 4 over Beaver 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 4 over Beaver River carry?

About 5,900 vehicles per day (2019 count), of which roughly 9% are trucks.

How long is Csah 4 over Beaver River?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3.1 m).

Who owns Csah 4 over Beaver River?

It is owned by the County Highway Agency.