US Bridges

Mn 56 over Dobbins Creek

Fair

Mower County, Minnesota · 3.6 MI N of JCT TH 90 · Structure no. 6148

Built
1932
93 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
40 ft
3 main spans
Daily traffic
2,900
2018 count
Owner
State
State Highway Agency

About this bridge

Mn 56 over Dobbins Creek is a concrete culvert carrying Mn 56 over Dobbins Creek in Mower County, Minnesota. It was built in 1932, so it is 93 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 2,900 vehicles a day, roughly 10% of them trucks, projected to reach 3,200 by 2038. The structure is 40 ft (12.2 m) long. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesMn 56
CrossesDobbins Creek
Location3.6 MI N of JCT TH 90
RouteState Highway 56
CountyMower County
StateMinnesota
Coordinates43.72381, -92.86929
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 inspectionAugust 2023
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 rating28.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span12 ft (3.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,900 (2018)
Projected traffic3,200 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 56 over Dobbins Creek built?

It was built in 1932, making it 93 years old in 2025.

What condition is Mn 56 over Dobbins Creek 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 August 2023.

How much traffic does Mn 56 over Dobbins Creek carry?

About 2,900 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is Mn 56 over Dobbins Creek?

The structure is 40 ft (12.2 m) long with a longest span of 12 ft (3.8 m).

Who owns Mn 56 over Dobbins Creek?

It is owned by the State Highway Agency.