US Bridges

NB US 61 over Crow Creek

Fair

Scott County, Iowa · 1.6 Mi. N of Jct. I-80 · Structure no. 000000000604660

Built
1981
44 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
123 ft
3 main spans
Daily traffic
17,750
2022 count
Owner
State
State Highway Agency

About this bridge

NB US 61 over Crow Creek is a concrete continuous slab carrying NB US 61 over Crow Creek 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 17,750 vehicles a day, roughly 10% of them trucks, projected to reach 17,750 by 2042. The structure is 123 ft (37.5 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNB US 61
CrossesCrow Creek
Location1.6 Mi. N of Jct. I-80
RouteU.S. Route 61
CountyScott County
StateIowa
Coordinates41.61823, -90.56368
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating69.7 US tons
Inventory rating41.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length123 ft (37.5 m)
Longest span47 ft (14.3 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,750 (2022)
Projected traffic17,750 by 2042
Trucks10%
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 NB US 61 over Crow Creek built?

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

What condition is NB US 61 over Crow 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 April 2023.

How much traffic does NB US 61 over Crow Creek carry?

About 17,750 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is NB US 61 over Crow Creek?

The structure is 123 ft (37.5 m) long with a longest span of 47 ft (14.3 m) and a deck 43 ft wide.

Who owns NB US 61 over Crow Creek?

It is owned by the State Highway Agency.