US Bridges

US 30 over Hardin Creek

Fair

Greene County, Iowa · 1.8 Mi. E of Jct. Ia 4 · Structure no. 000000000025620

Built
1957
68 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
197 ft
5 main spans
Daily traffic
4,230
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 over Hardin Creek is a concrete continuous slab carrying US 30 over Hardin Creek in Greene County, Iowa. It was built in 1957, so it is 68 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 4,230 vehicles a day, roughly 17% of them trucks, projected to reach 4,230 by 2044. The structure is 197 ft (60 m) long and 35 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesUS 30
CrossesHardin Creek
Location1.8 Mi. E of Jct. Ia 4
RouteU.S. Route 30
CountyGreene County
StateIowa
Coordinates42.03457, -94.34335
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.8 US tons
Inventory rating38.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length197 ft (60 m)
Longest span42 ft (12.8 m)
Deck width35 ft (10.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,230 (2022)
Projected traffic4,230 by 2044
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 Hardin Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is US 30 over Hardin 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 July 2024.

How much traffic does US 30 over Hardin Creek carry?

About 4,230 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is US 30 over Hardin Creek?

The structure is 197 ft (60 m) long with a longest span of 42 ft (12.8 m) and a deck 35 ft wide.

Who owns US 30 over Hardin Creek?

It is owned by the State Highway Agency.