US Bridges

Ia 4 over Drainage Ditch #41

Fair

Palo Alto County, Iowa · 5.5 MI S of JCT US 18 · Structure no. 000000000606021

Built
2000
25 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
2,040
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 4 over Drainage Ditch #41 is a concrete continuous culvert carrying Ia 4 over Drainage Ditch #41 in Palo Alto County, Iowa. It was built in 2000, so it is 25 years old, younger 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.

It carries about 2,040 vehicles a day, roughly 19% of them trucks, projected to reach 2,040 by 2044. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesIa 4
CrossesDrainage Ditch #41
Location5.5 MI S of JCT US 18
RouteState Highway 4
CountyPalo Alto County
StateIowa
Coordinates43.03393, -94.67873
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.2 US tons
Inventory rating25.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,040 (2022)
Projected traffic2,040 by 2044
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 4 over Drainage Ditch #41 built?

It was built in 2000, making it 25 years old in 2025.

What condition is Ia 4 over Drainage Ditch #41 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 March 2024.

How much traffic does Ia 4 over Drainage Ditch #41 carry?

About 2,040 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is Ia 4 over Drainage Ditch #41?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns Ia 4 over Drainage Ditch #41?

It is owned by the State Highway Agency.