US Bridges

I 280 WB US 61 NB over Duck Creek

Good

Scott County, Iowa · 2.5 Mi. S of US 6 · Structure no. 000000000600651

Built
2015
10 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete
Length
141 ft
3 main spans
Daily traffic
11,750
2022 count
Owner
State
State Highway Agency

About this bridge

I 280 WB US 61 NB over Duck Creek is a concrete slab carrying I 280 WB US 61 NB over Duck Creek in Scott County, Iowa. It was built in 2015, so it is 10 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 11,750 vehicles a day, roughly 32% of them trucks, projected to reach 11,750 by 2043. The structure is 141 ft (42.9 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 280 WB US 61 NB
CrossesDuck Creek
Location2.5 Mi. S of US 6
RouteInterstate 280
StateIowa
Coordinates41.55542, -90.67806
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length141 ft (42.9 m)
Longest span55 ft (16.8 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,750 (2022)
Projected traffic11,750 by 2043
Trucks32%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I 280 WB US 61 NB over Duck Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is I 280 WB US 61 NB over Duck Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does I 280 WB US 61 NB over Duck Creek carry?

About 11,750 vehicles per day (2022 count), of which roughly 32% are trucks.

How long is I 280 WB US 61 NB over Duck Creek?

The structure is 141 ft (42.9 m) long with a longest span of 55 ft (16.8 m) and a deck 43 ft wide.

Who owns I 280 WB US 61 NB over Duck Creek?

It is owned by the State Highway Agency.