US Bridges

US 6 over Rock Creek

Fair

Jasper County, Iowa · 3.3 Mi. E of Jct. Ia 224 · Structure no. 000000000030511

Built
1980
45 years old
Condition
Fair
inspected February 2023
Type
Slab
Concrete Continuous
Length
133 ft
3 main spans
Daily traffic
2,180
2022 count
Owner
State
State Highway Agency

About this bridge

US 6 over Rock Creek is a concrete continuous slab carrying US 6 over Rock Creek in Jasper County, Iowa. It was built in 1980, so it is 45 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 2,180 vehicles a day, roughly 7% of them trucks, projected to reach 2,180 by 2042. The structure is 133 ft (40.5 m) long and 47 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesUS 6
CrossesRock Creek
Location3.3 Mi. E of Jct. Ia 224
RouteU.S. Route 6
CountyJasper County
StateIowa
Coordinates41.71355, -92.84497
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating69.6 US tons
Inventory rating41.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length133 ft (40.5 m)
Longest span51 ft (15.5 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,180 (2022)
Projected traffic2,180 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Rock Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is US 6 over Rock 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 February 2023.

How much traffic does US 6 over Rock Creek carry?

About 2,180 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is US 6 over Rock Creek?

The structure is 133 ft (40.5 m) long with a longest span of 51 ft (15.5 m) and a deck 47 ft wide.

Who owns US 6 over Rock Creek?

It is owned by the State Highway Agency.