US Bridges

US 6 over Stony Creek

Poor

Poweshiek County, Iowa · 0.4 MI W of W JCT SR V18 · Structure no. 000000000045760

Built
1954
71 years old
Condition
Poor
inspected May 2024
Type
Slab
Concrete Continuous
Length
102 ft
3 main spans
Daily traffic
2,080
2022 count
Owner
State
State Highway Agency

About this bridge

US 6 over Stony Creek is a concrete continuous slab carrying US 6 over Stony Creek in Poweshiek County, Iowa. It was built in 1954, so it is 71 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 2,080 vehicles a day, roughly 13% of them trucks, projected to reach 2,080 by 2044. The structure is 102 ft (31.1 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 6
CrossesStony Creek
Location0.4 MI W of W JCT SR V18
RouteU.S. Route 6
CountyPoweshiek County
StateIowa
Coordinates41.74629, -92.45358
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be 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 rating49.2 US tons
Inventory rating29.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length102 ft (31.1 m)
Longest span38 ft (11.6 m)
Deck width35 ft (10.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,080 (2022)
Projected traffic2,080 by 2044
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Stony Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is US 6 over Stony Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does US 6 over Stony Creek carry?

About 2,080 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is US 6 over Stony Creek?

The structure is 102 ft (31.1 m) long with a longest span of 38 ft (11.6 m) and a deck 35 ft wide.

Who owns US 6 over Stony Creek?

It is owned by the State Highway Agency.