US Bridges

US 6 over Pig Run Creek

Fair

Johnson County, Iowa · 4.1 Mi. E of Jct. SR W-38 · Structure no. 000000000031480

Built
1923
102 years old, rebuilt 1960
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
5,300
2022 count
Owner
State
State Highway Agency

About this bridge

US 6 over Pig Run Creek is a concrete continuous culvert carrying US 6 over Pig Run Creek in Johnson County, Iowa. It was built in 1923 and reconstructed in 1960, so it is 102 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 5,300 vehicles a day, roughly 11% of them trucks, projected to reach 5,300 by 2044. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesUS 6
CrossesPig Run Creek
Location4.1 Mi. E of Jct. SR W-38
RouteU.S. Route 6
CountyJohnson County
StateIowa
Coordinates41.71433, -91.7114
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27 US tons
Inventory rating20 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length21 ft (6.4 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 traffic5,300 (2022)
Projected traffic5,300 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 US 6 over Pig Run Creek built?

It was built in 1923, making it 102 years old in 2025. It was reconstructed in 1960.

What condition is US 6 over Pig Run 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 September 2024.

How much traffic does US 6 over Pig Run Creek carry?

About 5,300 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is US 6 over Pig Run Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns US 6 over Pig Run Creek?

It is owned by the State Highway Agency.