US Bridges

US 20 EB on Ramp over S Fork Catfish Creek

Good

Dubuque County, Iowa · US 20 & Ia 52 SW Arterial · Structure no. 000000000700840

Built
2019
6 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
238 ft
3 main spans
Daily traffic
2,420
2022 count
Owner
State
State Highway Agency

About this bridge

US 20 EB on Ramp over S Fork Catfish Creek is a prestressed concrete stringer/multi-beam or girder carrying US 20 EB on Ramp over S Fork Catfish Creek in Dubuque County, Iowa. It was built in 2019, so it is 6 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,420 vehicles a day, roughly 10% of them trucks, projected to reach 2,420 by 2044. The structure is 238 ft (72.5 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 20 EB on Ramp
CrossesS Fork Catfish Creek
LocationUS 20 & Ia 52 SW Arterial
RouteU.S. Route 20
StateIowa
Coordinates42.47479, -90.75948
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
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

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length238 ft (72.5 m)
Longest span82 ft (24.9 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,420 (2022)
Projected traffic2,420 by 2044
Trucks10%
Lanes on structure1
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 US 20 EB on Ramp over S Fork Catfish Creek built?

It was built in 2019, making it 6 years old in 2025.

What condition is US 20 EB on Ramp over S Fork Catfish 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 March 2024.

How much traffic does US 20 EB on Ramp over S Fork Catfish Creek carry?

About 2,420 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is US 20 EB on Ramp over S Fork Catfish Creek?

The structure is 238 ft (72.5 m) long with a longest span of 82 ft (24.9 m) and a deck 31 ft wide.

Who owns US 20 EB on Ramp over S Fork Catfish Creek?

It is owned by the State Highway Agency.