US Bridges

Csah 8 over Otter Tail River

Good

Otter Tail County, Minnesota · 1.5 MI SW of JCT Csah 13 · Structure no. 56545

Built
2021
4 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete Continuous
Length
74 ft
2 main spans
Daily traffic
2,000
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 8 over Otter Tail River is a concrete continuous slab carrying Csah 8 over Otter Tail River in Otter Tail County, Minnesota. It was built in 2021, so it is 4 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 2,000 vehicles a day, projected to reach 1,800 by 2039. The structure is 74 ft (22.7 m) long and 39 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesCsah 8
CrossesOtter Tail River
Location1.5 MI SW of JCT Csah 13
RouteCounty Highway 8
Coordinates46.62664, -95.54017
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation9: Superior to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating44.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length74 ft (22.7 m)
Longest span36 ft (11.1 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2019)
Projected traffic1,800 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Otter Tail River built?

It was built in 2021, making it 4 years old in 2025.

What condition is Csah 8 over Otter Tail 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 November 2023.

How much traffic does Csah 8 over Otter Tail River carry?

About 2,000 vehicles per day (2019 count).

How long is Csah 8 over Otter Tail River?

The structure is 74 ft (22.7 m) long with a longest span of 36 ft (11.1 m) and a deck 39 ft wide.

Who owns Csah 8 over Otter Tail River?

It is owned by the County Highway Agency.