US Bridges

Mn 30 over Stream

Fair

Blue Earth County, Minnesota · 7.0 MI E of JCT TH 15 · Structure no. 8805

Built
1954
71 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
431
2021 count
Owner
State
State Highway Agency

About this bridge

Mn 30 over Stream is a concrete culvert carrying Mn 30 over Stream in Blue Earth County, Minnesota. It was built in 1954, so it is 71 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 431 vehicles a day, roughly 22% of them trucks, projected to reach 470 by 2041. The structure is 22 ft (6.8 m) long. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesMn 30
CrossesStream
Location7.0 MI E of JCT TH 15
RouteState Highway 30
CountyBlue Earth County
StateMinnesota
Coordinates43.89136, -94.28909
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 spans2
Design loadH 20
Structure length22 ft (6.8 m)
Longest span10 ft (3.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic431 (2021)
Projected traffic470 by 2041
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$84 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 30 over Stream built?

It was built in 1954, making it 71 years old in 2025.

What condition is Mn 30 over Stream 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 June 2024.

How much traffic does Mn 30 over Stream carry?

About 431 vehicles per day (2021 count), of which roughly 22% are trucks.

How long is Mn 30 over Stream?

The structure is 22 ft (6.8 m) long with a longest span of 10 ft (3.1 m).

Who owns Mn 30 over Stream?

It is owned by the State Highway Agency.