US Bridges

US 30 over Drainage Ditch

Good

Crawford County, Iowa · 0.5 MI N of Ia. 37 · Structure no. 000000000021201

Built
2015
10 years old
Condition
Good
inspected March 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
3,180
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 over Drainage Ditch is a concrete culvert carrying US 30 over Drainage Ditch in Crawford County, Iowa. It was built in 2015, so it is 10 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,180 vehicles a day, roughly 24% of them trucks, projected to reach 3,180 by 2044. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesUS 30
CrossesDrainage Ditch
Location0.5 MI N of Ia. 37
RouteU.S. Route 30
CountyCrawford County
StateIowa
Coordinates41.86427, -95.59693
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating44.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,180 (2022)
Projected traffic3,180 by 2044
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 2015, making it 10 years old in 2025.

What condition is US 30 over Drainage Ditch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does US 30 over Drainage Ditch carry?

About 3,180 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is US 30 over Drainage Ditch?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).

Who owns US 30 over Drainage Ditch?

It is owned by the State Highway Agency.