US Bridges

SB US 61 over Wapsipinicon Bayou

Fair

Scott County, Iowa · 1.8 Mi. N of SR F 33 · Structure no. 000000000604635

Built
1981
44 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
283 ft
6 main spans
Daily traffic
8,800
2022 count
Owner
State
State Highway Agency

About this bridge

SB US 61 over Wapsipinicon Bayou is a concrete continuous slab carrying SB US 61 over Wapsipinicon Bayou in Scott County, Iowa. It was built in 1981, so it is 44 years old, younger 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 8,800 vehicles a day, roughly 16% of them trucks, projected to reach 8,800 by 2043. The structure is 283 ft (86.3 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSB US 61
CrossesWapsipinicon Bayou
Location1.8 Mi. N of SR F 33
RouteU.S. Route 61
CountyScott County
StateIowa
Coordinates41.75437, -90.56875
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating75.6 US tons
Inventory rating45.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length283 ft (86.3 m)
Longest span50 ft (15.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,800 (2022)
Projected traffic8,800 by 2043
Trucks16%
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 SB US 61 over Wapsipinicon Bayou built?

It was built in 1981, making it 44 years old in 2025.

What condition is SB US 61 over Wapsipinicon Bayou 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 September 2023.

How much traffic does SB US 61 over Wapsipinicon Bayou carry?

About 8,800 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is SB US 61 over Wapsipinicon Bayou?

The structure is 283 ft (86.3 m) long with a longest span of 50 ft (15.2 m) and a deck 43 ft wide.

Who owns SB US 61 over Wapsipinicon Bayou?

It is owned by the State Highway Agency.