US Bridges

Mn 30 over I 35

Fair

Steele County, Minnesota · At JCT TH 30 · Structure no. 74801

Built
1965
60 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
212 ft
4 main spans
Daily traffic
1,741
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 30 over I 35 is a prestressed concrete stringer/multi-beam or girder carrying Mn 30 over I 35 in Steele County, Minnesota. It was built in 1965, so it is 60 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 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 1,741 vehicles a day, roughly 13% of them trucks, projected to reach 2,500 by 2042. The structure is 212 ft (64.6 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMn 30
CrossesI 35
LocationAt JCT TH 30
RouteState Highway 30
CountySteele County
StateMinnesota
Coordinates43.87008, -93.27698
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.9 US tons
Inventory rating29.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length212 ft (64.6 m)
Longest span67 ft (20.4 m)
Deck width36 ft (10.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,741 (2022)
Projected traffic2,500 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mn 30 over I 35 built?

It was built in 1965, making it 60 years old in 2025.

What condition is Mn 30 over I 35 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 2023.

How much traffic does Mn 30 over I 35 carry?

About 1,741 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is Mn 30 over I 35?

The structure is 212 ft (64.6 m) long with a longest span of 67 ft (20.4 m) and a deck 36 ft wide.

Who owns Mn 30 over I 35?

It is owned by the State Highway Agency.