US Bridges

US 30 over US 30 & US 61

Fair

Clinton County, Iowa · At E Jct. of US 61 · Structure no. 000000000607140

Built
1975
50 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
285 ft
4 main spans
Daily traffic
3,200
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 over US 30 & US 61 is a steel continuous stringer/multi-beam or girder carrying US 30 over US 30 & US 61 in Clinton County, Iowa. It was built in 1975, so it is 50 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 3,200 vehicles a day, roughly 11% of them trucks, projected to reach 3,200 by 2042. The structure is 285 ft (86.9 m) long and 52 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesUS 30
CrossesUS 30 & US 61
LocationAt E Jct. of US 61
RouteU.S. Route 30
CountyClinton County
StateIowa
Coordinates41.80866, -90.56747
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating50.8 US tons
Inventory rating30.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length285 ft (86.9 m)
Longest span88 ft (26.8 m)
Deck width52 ft (15.7 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,200 (2022)
Projected traffic3,200 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed6.2 mi (10 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 30 over US 30 & US 61 built?

It was built in 1975, making it 50 years old in 2025.

What condition is US 30 over US 30 & 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 August 2023.

How much traffic does US 30 over US 30 & US 61 carry?

About 3,200 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is US 30 over US 30 & US 61?

The structure is 285 ft (86.9 m) long with a longest span of 88 ft (26.8 m) and a deck 52 ft wide.

Who owns US 30 over US 30 & US 61?

It is owned by the State Highway Agency.