US Bridges

Mn 74 over Mid Fk Whitewater River

Poor

Winona County, Minnesota · 3.0 MI S of JCT Csah 26 · Structure no. 85006

Built
1964
61 years old
Condition
Poor
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
142 ft
3 main spans
Daily traffic
807
2022 count
Owner
State
State Highway Agency

About this bridge

Mn 74 over Mid Fk Whitewater River is a prestressed concrete stringer/multi-beam or girder carrying Mn 74 over Mid Fk Whitewater River in Winona County, Minnesota. It was built in 1964, so it is 61 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 807 vehicles a day, roughly 7% of them trucks, projected to reach 870 by 2042. The structure is 142 ft (43.2 m) long and 37 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesMn 74
CrossesMid Fk Whitewater River
Location3.0 MI S of JCT Csah 26
RouteState Highway 74
Coordinates44.05667, -92.04637
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.2 US tons
Inventory rating28.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length142 ft (43.2 m)
Longest span47 ft (14.4 m)
Deck width37 ft (11.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic807 (2022)
Projected traffic870 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed16.2 mi (26 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$450 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Mn 74 over Mid Fk Whitewater River built?

It was built in 1964, making it 61 years old in 2025.

What condition is Mn 74 over Mid Fk Whitewater River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does Mn 74 over Mid Fk Whitewater River carry?

About 807 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Mn 74 over Mid Fk Whitewater River?

The structure is 142 ft (43.2 m) long with a longest span of 47 ft (14.4 m) and a deck 37 ft wide.

Who owns Mn 74 over Mid Fk Whitewater River?

It is owned by the State Highway Agency.