US Bridges

US 30 over Powley Drain Ditch

Fair

Harrison County, Iowa · 2.2 Mi. E of SR F32 · Structure no. 000000000027511

Built
1983
42 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
73 ft
3 main spans
Daily traffic
3,090
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 over Powley Drain Ditch is a concrete continuous slab carrying US 30 over Powley Drain Ditch in Harrison County, Iowa. It was built in 1983, so it is 42 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 3,090 vehicles a day, roughly 24% of them trucks, projected to reach 3,090 by 2043. The structure is 73 ft (22.3 m) long and 47 ft wide. If it were closed, the detour would be 41 mi (66 km).

CarriesUS 30
CrossesPowley Drain Ditch
Location2.2 Mi. E of SR F32
RouteU.S. Route 30
StateIowa
Coordinates41.76176, -95.6848
Functional classRural Principal Arterial - Other

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length73 ft (22.3 m)
Longest span28 ft (8.5 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,090 (2022)
Projected traffic3,090 by 2043
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed41 mi (66 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 Powley Drain Ditch built?

It was built in 1983, making it 42 years old in 2025.

What condition is US 30 over Powley Drain 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 August 2023.

How much traffic does US 30 over Powley Drain Ditch carry?

About 3,090 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is US 30 over Powley Drain Ditch?

The structure is 73 ft (22.3 m) long with a longest span of 28 ft (8.5 m) and a deck 47 ft wide.

Who owns US 30 over Powley Drain Ditch?

It is owned by the State Highway Agency.