US Bridges

WB US 30 over Brophys Creek

Fair

Clinton County, Iowa · 8.5 Mi. E of E Jct. US 61 · Structure no. 000000000020821

Built
1978
47 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
142 ft
4 main spans
Daily traffic
5,000
2022 count
Owner
State
State Highway Agency

About this bridge

WB US 30 over Brophys Creek is a concrete continuous slab carrying WB US 30 over Brophys Creek in Clinton County, Iowa. It was built in 1978, so it is 47 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 5,000 vehicles a day, roughly 14% of them trucks, projected to reach 5,000 by 2042. The structure is 142 ft (43.3 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesWB US 30
CrossesBrophys Creek
Location8.5 Mi. E of E Jct. US 61
RouteU.S. Route 30
StateIowa
Coordinates41.81572, -90.40381
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.1 US tons
Inventory rating39.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length142 ft (43.3 m)
Longest span39 ft (11.9 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2022)
Projected traffic5,000 by 2042
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 WB US 30 over Brophys Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is WB US 30 over Brophys 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 May 2024.

How much traffic does WB US 30 over Brophys Creek carry?

About 5,000 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is WB US 30 over Brophys Creek?

The structure is 142 ft (43.3 m) long with a longest span of 39 ft (11.9 m) and a deck 43 ft wide.

Who owns WB US 30 over Brophys Creek?

It is owned by the State Highway Agency.