US Bridges

Mn 65 over Snake River

Fair

Aitkin County, Minnesota · 8.7 MI N of JCT TH 18 · Structure no. 4502

Built
1937
88 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
41 ft
3 main spans
Daily traffic
2,318
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 65 over Snake River is a concrete culvert carrying Mn 65 over Snake River in Aitkin County, Minnesota. It was built in 1937, so it is 88 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 2,318 vehicles a day, roughly 8% of them trucks, projected to reach 1,950 by 2042. The structure is 41 ft (12.6 m) long. If it were closed, the detour would be 24.2 mi (39 km).

Location

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CarriesMn 65
CrossesSnake River
Location8.7 MI N of JCT TH 18
RouteState Highway 65
CountyAitkin County
StateMinnesota
Coordinates46.33913, -93.26181
Functional classRural Minor Arterial

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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 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 rating43.2 US tons
Inventory rating32.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 20
Structure length41 ft (12.6 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,318 (2022)
Projected traffic1,950 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Mn 65 over Snake River built?

It was built in 1937, making it 88 years old in 2025.

What condition is Mn 65 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 July 2024.

How much traffic does Mn 65 over Snake River carry?

About 2,318 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Mn 65 over Snake River?

The structure is 41 ft (12.6 m) long with a longest span of 11 ft (3.5 m).

Who owns Mn 65 over Snake River?

It is owned by the State Highway Agency.