US Bridges

Csah 8 over Portage River

Good

Carlton County, Minnesota · 0.2 MI S of JCT Csah 8 · Structure no. 09J51

Built
2024
1 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
111
2023 count
Owner
County
County Highway Agency

About this bridge

Csah 8 over Portage River is a concrete culvert carrying Csah 8 over Portage River in Carlton County, Minnesota. It was built in 2024, so it is 1 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 111 vehicles a day, projected to reach 122 by 2043. The structure is 31 ft (9.6 m) long. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesCsah 8
CrossesPortage River
Location0.2 MI S of JCT Csah 8
RouteCounty Highway 13
CountyCarlton County
StateMinnesota
Coordinates46.45474, -92.70447
Functional classRural Minor 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 protection9 ExcellentNo problems noted.
Culvert9 ExcellentNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 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 rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length31 ft (9.6 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic111 (2023)
Projected traffic122 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 8 over Portage River built?

It was built in 2024, making it 1 years old in 2025.

What condition is Csah 8 over Portage 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 October 2024.

How much traffic does Csah 8 over Portage River carry?

About 111 vehicles per day (2023 count).

How long is Csah 8 over Portage River?

The structure is 31 ft (9.6 m) long with a longest span of 14 ft (4.3 m).

Who owns Csah 8 over Portage River?

It is owned by the County Highway Agency.