US Bridges

Csah 3 over Snake River

Fair

Kanabec County, Minnesota · 0.5 MI W of JCT Csah 11 · Structure no. 33515

Built
1986
39 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete Continuous
Length
135 ft
4 main spans
Daily traffic
1,100
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 3 over Snake River is a concrete continuous slab carrying Csah 3 over Snake River in Kanabec County, Minnesota. It was built in 1986, so it is 39 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 1,100 vehicles a day, projected to reach 1,150 by 2038. The structure is 135 ft (41 m) long and 39 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

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CarriesCsah 3
CrossesSnake River
Location0.5 MI W of JCT Csah 11
RouteCounty Highway 3
CountyKanabec County
StateMinnesota
Coordinates46.02463, -93.23096
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95 US tons
Inventory rating56.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length135 ft (41 m)
Longest span37 ft (11.3 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2018)
Projected traffic1,150 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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$520 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 3 over Snake River built?

It was built in 1986, making it 39 years old in 2025.

What condition is Csah 3 over Snake 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 3 over Snake River carry?

About 1,100 vehicles per day (2018 count).

How long is Csah 3 over Snake River?

The structure is 135 ft (41 m) long with a longest span of 37 ft (11.3 m) and a deck 39 ft wide.

Who owns Csah 3 over Snake River?

It is owned by the County Highway Agency.