US Bridges

US 6 over I-280 & US 61

Fair

Scott County, Iowa · 0.8 Mi.E.Of JCT I-80/280 · Structure no. 000000000046805

Built
1971
54 years old, rebuilt 2023
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
334 ft
4 main spans
Daily traffic
6,100
2022 count
Owner
State
State Highway Agency

About this bridge

US 6 over I-280 & US 61 is a steel continuous stringer/multi-beam or girder carrying US 6 over I-280 & US 61 in Scott County, Iowa. It was built in 1971 and reconstructed in 2023, so it is 54 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 6,100 vehicles a day, roughly 6% of them trucks, projected to reach 6,100 by 2044. The structure is 334 ft (101.8 m) long and 47 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesUS 6
CrossesI-280 & US 61
Location0.8 Mi.E.Of JCT I-80/280
RouteU.S. Route 6
CountyScott County
StateIowa
Coordinates41.59182, -90.67636
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
Deck8 Very GoodNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating67.5 US tons
Inventory rating40.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length334 ft (101.8 m)
Longest span113 ft (34.4 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,100 (2022)
Projected traffic6,100 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed8.7 mi (14 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 6 over I-280 & US 61 built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2023.

What condition is US 6 over I-280 & US 61 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 May 2024.

How much traffic does US 6 over I-280 & US 61 carry?

About 6,100 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is US 6 over I-280 & US 61?

The structure is 334 ft (101.8 m) long with a longest span of 113 ft (34.4 m) and a deck 47 ft wide.

Who owns US 6 over I-280 & US 61?

It is owned by the State Highway Agency.