US Bridges

Mn 27 over Stream

Fair

Morrison County, Minnesota · 11.7 MI W of Onamia · Structure no. 6737

Built
1950
75 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
27 ft
1 main span
Daily traffic
1,216
2021 count
Owner
State
State Highway Agency

About this bridge

Mn 27 over Stream is a steel stringer/multi-beam or girder carrying Mn 27 over Stream in Morrison County, Minnesota. It was built in 1950, so it is 75 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 1,216 vehicles a day, roughly 3% of them trucks, projected to reach 1,200 by 2041. The structure is 27 ft (8.1 m) long and 34 ft wide. If it were closed, the detour would be 62.1 mi (100 km).

Location

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CarriesMn 27
CrossesStream
Location11.7 MI W of Onamia
RouteState Highway 27
CountyMorrison County
StateMinnesota
Coordinates46.07753, -93.88789
Functional classRural Major Collector

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.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.9 US tons
Inventory rating55.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length27 ft (8.1 m)
Longest span24 ft (7.3 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,216 (2021)
Projected traffic1,200 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed62.1 mi (100 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$85 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 27 over Stream built?

It was built in 1950, making it 75 years old in 2025.

What condition is Mn 27 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 July 2024.

How much traffic does Mn 27 over Stream carry?

About 1,216 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Mn 27 over Stream?

The structure is 27 ft (8.1 m) long with a longest span of 24 ft (7.3 m) and a deck 34 ft wide.

Who owns Mn 27 over Stream?

It is owned by the State Highway Agency.