US Bridges

US 30 over Drainage Ditch

Fair

Crawford County, Iowa · 1.7 MI E of E JCT US 59 · Structure no. 000000000601005

Built
1958
67 years old, rebuilt 1997
Condition
Fair
inspected January 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
4,670
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 over Drainage Ditch is a concrete continuous culvert carrying US 30 over Drainage Ditch in Crawford County, Iowa. It was built in 1958 and reconstructed in 1997, so it is 67 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.

It carries about 4,670 vehicles a day, roughly 16% of them trucks, projected to reach 4,670 by 2042. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 30
CrossesDrainage Ditch
Location1.7 MI E of E JCT US 59
RouteU.S. Route 30
CountyCrawford County
StateIowa
Coordinates42.01277, -95.33294
Functional classUrban Other Principal 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: 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 rating27 US tons
Inventory rating20 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 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 traffic4,670 (2022)
Projected traffic4,670 by 2042
Trucks16%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 US 30 over Drainage Ditch built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1997.

What condition is US 30 over Drainage Ditch 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 January 2023.

How much traffic does US 30 over Drainage Ditch carry?

About 4,670 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is US 30 over Drainage Ditch?

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

Who owns US 30 over Drainage Ditch?

It is owned by the State Highway Agency.