US Bridges

Mn 30 over Ditch

Fair

Steele County, Minnesota · 4.5 MI E of JCT TH 35 · Structure no. 6733

Built
1949
76 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
39 ft
3 main spans
Daily traffic
1,047
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 30 over Ditch is a concrete culvert carrying Mn 30 over Ditch in Steele County, Minnesota. It was built in 1949, so it is 76 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 1,047 vehicles a day, roughly 15% of them trucks, projected to reach 1,200 by 2042. The structure is 39 ft (12 m) long. If it were closed, the detour would be 14.3 mi (23 km).

Location

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CarriesMn 30
CrossesDitch
Location4.5 MI E of JCT TH 35
RouteState Highway 30
CountySteele County
StateMinnesota
Coordinates43.87133, -93.189
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 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
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 length39 ft (12 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,047 (2022)
Projected traffic1,200 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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$162 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 30 over Ditch built?

It was built in 1949, making it 76 years old in 2025.

What condition is Mn 30 over Ditch 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 Ditch carry?

About 1,047 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is Mn 30 over Ditch?

The structure is 39 ft (12 m) long with a longest span of 14 ft (4.3 m).

Who owns Mn 30 over Ditch?

It is owned by the State Highway Agency.