US Bridges

Csah 42 over Little Knife River

Good

St. Louis County, Minnesota · 0.3 MI N of JCT CSAH40 · Structure no. 69J58

Built
2008
17 years old
Condition
Good
inspected July 2024
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
690
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 42 over Little Knife River is a concrete culvert carrying Csah 42 over Little Knife River in St. Louis County, Minnesota. It was built in 2008, so it is 17 years old, younger than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 690 vehicles a day, projected to reach 640 by 2039. The structure is 24 ft (7.2 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCsah 42
CrossesLittle Knife River
Location0.3 MI N of JCT CSAH40
RouteCounty Highway 42
Coordinates47.00144, -91.84711
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating75.6 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length24 ft (7.2 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 traffic690 (2019)
Projected traffic640 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 42 over Little Knife River built?

It was built in 2008, making it 17 years old in 2025.

What condition is Csah 42 over Little Knife River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does Csah 42 over Little Knife River carry?

About 690 vehicles per day (2019 count).

How long is Csah 42 over Little Knife River?

The structure is 24 ft (7.2 m) long with a longest span of 10 ft (3.1 m).

Who owns Csah 42 over Little Knife River?

It is owned by the County Highway Agency.