US Bridges

Csah 8 over Toad River

Fair

Otter Tail County, Minnesota · 0.5 MI E of JCT Csah 13 · Structure no. 91700

Built
1978
47 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete
Length
30 ft
2 main spans
Daily traffic
1,350
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 8 over Toad River is a concrete culvert carrying Csah 8 over Toad River in Otter Tail County, Minnesota. It was built in 1978, so it is 47 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.

It carries about 1,350 vehicles a day, projected to reach 1,250 by 2039. The structure is 30 ft (9 m) long. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesCsah 8
CrossesToad River
Location0.5 MI E of JCT Csah 13
RouteCounty Highway 8
CountyOtter Tail County
StateMinnesota
Coordinates46.64359, -95.5093
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.8 US tons
Inventory rating43.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length30 ft (9 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,350 (2019)
Projected traffic1,250 by 2039
Trucks—
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$192 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 8 over Toad River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Csah 8 over Toad 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 November 2023.

How much traffic does Csah 8 over Toad River carry?

About 1,350 vehicles per day (2019 count).

How long is Csah 8 over Toad River?

The structure is 30 ft (9 m) long with a longest span of 12 ft (3.7 m).

Who owns Csah 8 over Toad River?

It is owned by the County Highway Agency.