US Bridges

Csah 6 over Caldwell Brook

Good

Koochiching County, Minnesota · 0.7 MI S of JCT Csah 25 · Structure no. 36J14

Built
2013
12 years old
Condition
Good
inspected August 2024
Type
Culvert
Concrete
Length
47 ft
3 main spans
Daily traffic
175
2020 count
Owner
County
County Highway Agency

About this bridge

Csah 6 over Caldwell Brook is a concrete culvert carrying Csah 6 over Caldwell Brook in Koochiching County, Minnesota. It was built in 2013, so it is 12 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 175 vehicles a day, projected to reach 49 by 2040. The structure is 47 ft (14.2 m) long. If it were closed, the detour would be 13 mi (21 km).

CarriesCsah 6
CrossesCaldwell Brook
Location0.7 MI S of JCT Csah 25
RouteCounty Highway 6
Coordinates47.9205, -94.10226
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 protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating39.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHL 93
Structure length47 ft (14.2 m)
Longest span13 ft (3.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2020)
Projected traffic49 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 6 over Caldwell Brook built?

It was built in 2013, making it 12 years old in 2025.

What condition is Csah 6 over Caldwell Brook 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 August 2024.

How much traffic does Csah 6 over Caldwell Brook carry?

About 175 vehicles per day (2020 count).

How long is Csah 6 over Caldwell Brook?

The structure is 47 ft (14.2 m) long with a longest span of 13 ft (3.9 m).

Who owns Csah 6 over Caldwell Brook?

It is owned by the County Highway Agency.