US Bridges

Csah 4 over S Fk Groundhouse River

FairPosted for load

Kanabec County, Minnesota · 0.5 MI W of JCT CR 50 · Structure no. 33517

Built
1972
53 years old
Condition
Fair
inspected October 2023
Type
Slab
Wood or Timber
Length
66 ft
3 main spans
Daily traffic
440
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 4 over S Fk Groundhouse River is a wood or timber slab carrying Csah 4 over S Fk Groundhouse River in Kanabec County, Minnesota. It was built in 1972, so it is 53 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 440 vehicles a day, projected to reach 425 by 2038. The structure is 66 ft (20.1 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCsah 4
CrossesS Fk Groundhouse River
Location0.5 MI W of JCT CR 50
RouteCounty Highway 4
CountyKanabec County
StateMinnesota
Coordinates45.76153, -93.44292
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating35.6 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 20
Structure length66 ft (20.1 m)
Longest span26 ft (7.9 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic440 (2018)
Projected traffic425 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 S Fk Groundhouse River built?

It was built in 1972, making it 53 years old in 2025.

What condition is Csah 4 over S Fk Groundhouse 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 October 2023.

How much traffic does Csah 4 over S Fk Groundhouse River carry?

About 440 vehicles per day (2018 count).

How long is Csah 4 over S Fk Groundhouse River?

The structure is 66 ft (20.1 m) long with a longest span of 26 ft (7.9 m) and a deck 34 ft wide.

Who owns Csah 4 over S Fk Groundhouse River?

It is owned by the County Highway Agency.