US Bridges

Ia 140 over Rathburn Creek

Fair

Plymouth County, Iowa · 3.3 MI S of SR C38 · Structure no. 000000000272220

Built
1964
61 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
75 ft
3 main spans
Daily traffic
970
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 140 over Rathburn Creek is a concrete continuous slab carrying Ia 140 over Rathburn Creek in Plymouth County, Iowa. It was built in 1964, so it is 61 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 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 970 vehicles a day, roughly 19% of them trucks, projected to reach 970 by 2042. The structure is 75 ft (22.9 m) long and 30 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIa 140
CrossesRathburn Creek
Location3.3 MI S of SR C38
RouteState Highway 140
CountyPlymouth County
StateIowa
Coordinates42.70231, -95.95807
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating54.2 US tons
Inventory rating32.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length75 ft (22.9 m)
Longest span29 ft (8.8 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic970 (2022)
Projected traffic970 by 2042
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Ia 140 over Rathburn Creek built?

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

What condition is Ia 140 over Rathburn 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 April 2023.

How much traffic does Ia 140 over Rathburn Creek carry?

About 970 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is Ia 140 over Rathburn Creek?

The structure is 75 ft (22.9 m) long with a longest span of 29 ft (8.8 m) and a deck 30 ft wide.

Who owns Ia 140 over Rathburn Creek?

It is owned by the State Highway Agency.