US Bridges

Mn 336 over Isth 94

Fair

Clay County, Minnesota · At the JCT TH 94; TH 336 · Structure no. 14815

Built
2002
23 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
240 ft
2 main spans
Daily traffic
12,681
2021 count
Owner
State
State Highway Agency

About this bridge

Mn 336 over Isth 94 is a prestressed concrete stringer/multi-beam or girder carrying Mn 336 over Isth 94 in Clay County, Minnesota. It was built in 2002, so it is 23 years old, younger 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 5 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 12,681 vehicles a day, roughly 12% of them trucks, projected to reach 12,700 by 2041. The structure is 240 ft (73.1 m) long and 101 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMn 336
CrossesIsth 94
LocationAt the JCT TH 94; TH 336
RouteState Highway 336
CountyClay County
StateMinnesota
Coordinates46.84618, -96.65221
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.6 US tons
Inventory rating60.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length240 ft (73.1 m)
Longest span130 ft (39.6 m)
Deck width101 ft (30.9 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,681 (2021)
Projected traffic12,700 by 2041
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mn 336 over Isth 94 built?

It was built in 2002, making it 23 years old in 2025.

What condition is Mn 336 over Isth 94 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 September 2023.

How much traffic does Mn 336 over Isth 94 carry?

About 12,681 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is Mn 336 over Isth 94?

The structure is 240 ft (73.1 m) long with a longest span of 130 ft (39.6 m) and a deck 101 ft wide.

Who owns Mn 336 over Isth 94?

It is owned by the State Highway Agency.