US Bridges

I-280 (eb) over Duck Creek

Fair

Scott County, Iowa · 3.4 Mi. S of Jct. I-80 · Structure no. 000000000600680

Built
1972
53 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
127 ft
3 main spans
Daily traffic
11,750
2021 count
Owner
State
State Highway Agency

About this bridge

I-280 (eb) over Duck Creek is a concrete continuous slab carrying I-280 (eb) over Duck Creek in Scott County, Iowa. It was built in 1972, so it is 53 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 11,750 vehicles a day, roughly 32% of them trucks, projected to reach 11,750 by 2043. The structure is 127 ft (38.7 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-280 (eb)
CrossesDuck Creek
Location3.4 Mi. S of Jct. I-80
RouteInterstate 280
CountyScott County
StateIowa
Coordinates41.55574, -90.67839
Functional classUrban Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.6 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length127 ft (38.7 m)
Longest span49 ft (14.9 m)
Deck width43 ft (13 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,750 (2021)
Projected traffic11,750 by 2043
Trucks32%
Lanes on structure2
Traffic directionOne-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 (eb) over Duck Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is I-280 (eb) over Duck 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 June 2023.

How much traffic does I-280 (eb) over Duck Creek carry?

About 11,750 vehicles per day (2021 count), of which roughly 32% are trucks.

How long is I-280 (eb) over Duck Creek?

The structure is 127 ft (38.7 m) long with a longest span of 49 ft (14.9 m) and a deck 43 ft wide.

Who owns I-280 (eb) over Duck Creek?

It is owned by the State Highway Agency.