US Bridges

Csah 22 over Beaver Brook

FairPosted for load

Koochiching County, Minnesota · 1.2 MI N of JCT TH 217 · Structure no. 36507

Built
1970
55 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
144 ft
3 main spans
Daily traffic
453
2021 count
Owner
County
County Highway Agency

About this bridge

Csah 22 over Beaver Brook is a steel continuous stringer/multi-beam or girder carrying Csah 22 over Beaver Brook in Koochiching County, Minnesota. It was built in 1970, so it is 55 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 453 vehicles a day, projected to reach 465 by 2041. The structure is 144 ft (44 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCsah 22
CrossesBeaver Brook
Location1.2 MI N of JCT TH 217
RouteCounty Highway 22
CountyKoochiching County
StateMinnesota
Coordinates48.41173, -93.54893
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating59.4 US tons
Inventory rating35.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length144 ft (44 m)
Longest span54 ft (16.5 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic453 (2021)
Projected traffic465 by 2041
Trucks—
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 22 over Beaver Brook built?

It was built in 1970, making it 55 years old in 2025.

What condition is Csah 22 over Beaver Brook 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 22 over Beaver Brook carry?

About 453 vehicles per day (2021 count).

How long is Csah 22 over Beaver Brook?

The structure is 144 ft (44 m) long with a longest span of 54 ft (16.5 m) and a deck 34 ft wide.

Who owns Csah 22 over Beaver Brook?

It is owned by the County Highway Agency.