US Bridges

FM K-42 over Mink Creek

FairPosted for load

Plymouth County, Iowa · 092460304 · Structure no. 000000000274800

Built
1961
64 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
150 ft
3 main spans
Daily traffic
628
2022 count
Owner
County
County Highway Agency

About this bridge

FM K-42 over Mink Creek is a steel continuous stringer/multi-beam or girder carrying FM K-42 over Mink Creek in Plymouth County, Iowa. It was built in 1961, so it is 64 years old, older than the Iowa average of 45.5 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. Its operating status is: posted for load restriction.

It carries about 628 vehicles a day, roughly 14% of them trucks, projected to reach 628 by 2043. The structure is 150 ft (45.7 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesFM K-42
CrossesMink Creek
Location092460304
RouteCounty Highway 0
StateIowa
Coordinates42.81021, -96.27277
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.5 US tons
Inventory rating20.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length150 ft (45.7 m)
Longest span59 ft (18 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic628 (2022)
Projected traffic628 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$750,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FM K-42 over Mink Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is FM K-42 over Mink 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 July 2023.

How much traffic does FM K-42 over Mink Creek carry?

About 628 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is FM K-42 over Mink Creek?

The structure is 150 ft (45.7 m) long with a longest span of 59 ft (18 m) and a deck 26 ft wide.

Who owns FM K-42 over Mink Creek?

It is owned by the County Highway Agency.