US Bridges

Mn 105 over Turtle Creek

Fair

Mower County, Minnesota · 2.3 MI SE of JCT TH 90 · Structure no. 5971

Built
1957
68 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
134 ft
3 main spans
Daily traffic
5,698
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 105 over Turtle Creek is a steel continuous stringer/multi-beam or girder carrying Mn 105 over Turtle Creek in Mower County, Minnesota. It was built in 1957, so it is 68 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 5,698 vehicles a day, roughly 4% of them trucks, projected to reach 6,500 by 2042. The structure is 134 ft (40.8 m) long and 59 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMn 105
CrossesTurtle Creek
Location2.3 MI SE of JCT TH 90
RouteState Highway 105
CountyMower County
StateMinnesota
Coordinates43.655, -92.98957
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.4 US tons
Inventory rating39.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length134 ft (40.8 m)
Longest span50 ft (15.2 m)
Deck width59 ft (18.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,698 (2022)
Projected traffic6,500 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 105 over Turtle Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is Mn 105 over Turtle 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 105 over Turtle Creek carry?

About 5,698 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Mn 105 over Turtle Creek?

The structure is 134 ft (40.8 m) long with a longest span of 50 ft (15.2 m) and a deck 59 ft wide.

Who owns Mn 105 over Turtle Creek?

It is owned by the State Highway Agency.