US Bridges

Ia 461 SB over Duck Creek-Bike Path

Fair

Scott County, Iowa · 0.4 Mi. S of Jct.Us 6 · Structure no. 000000000047210

Built
1970
55 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
179 ft
4 main spans
Daily traffic
8,950
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 461 SB over Duck Creek-Bike Path is a concrete continuous slab carrying Ia 461 SB over Duck Creek-Bike Path in Scott County, Iowa. It was built in 1970, so it is 55 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 8,950 vehicles a day, roughly 2% of them trucks, projected to reach 8,950 by 2042. The structure is 179 ft (54.6 m) long and 67 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesIa 461 SB
CrossesDuck Creek-Bike Path
Location0.4 Mi. S of Jct.Us 6
RouteState Highway 461
CountyScott County
StateIowa
Coordinates41.55475, -90.57682
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating51.7 US tons
Inventory rating30.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length179 ft (54.6 m)
Longest span48 ft (14.6 m)
Deck width67 ft (20.3 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,950 (2022)
Projected traffic8,950 by 2042
Trucks2%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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 Ia 461 SB over Duck Creek-Bike Path built?

It was built in 1970, making it 55 years old in 2025.

What condition is Ia 461 SB over Duck Creek-Bike Path 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 April 2023.

How much traffic does Ia 461 SB over Duck Creek-Bike Path carry?

About 8,950 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Ia 461 SB over Duck Creek-Bike Path?

The structure is 179 ft (54.6 m) long with a longest span of 48 ft (14.6 m) and a deck 67 ft wide.

Who owns Ia 461 SB over Duck Creek-Bike Path?

It is owned by the State Highway Agency.