US Bridges

SB US 218 over Crooked Creek

Fair

Johnson County, Iowa · 2.4 Mi. N of Jct. Ia 22 · Structure no. 000000000604570

Built
1982
43 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
126 ft
3 main spans
Daily traffic
9,850
2023 count
Owner
State
State Highway Agency

About this bridge

SB US 218 over Crooked Creek is a prestressed concrete stringer/multi-beam or girder carrying SB US 218 over Crooked Creek in Johnson County, Iowa. It was built in 1982, so it is 43 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 9,850 vehicles a day, roughly 16% of them trucks, projected to reach 9,850 by 2043. The structure is 126 ft (38.4 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 218
CrossesCrooked Creek
Location2.4 Mi. N of Jct. Ia 22
RouteU.S. Route 218
CountyJohnson County
StateIowa
Coordinates41.52161, -91.55119
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 alignment8: Equal to present desirable criteria
Operating rating82.6 US tons
Inventory rating57.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length126 ft (38.4 m)
Longest span52 ft (15.9 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,850 (2023)
Projected traffic9,850 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 218 over Crooked Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is SB US 218 over Crooked 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 SB US 218 over Crooked Creek carry?

About 9,850 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is SB US 218 over Crooked Creek?

The structure is 126 ft (38.4 m) long with a longest span of 52 ft (15.9 m) and a deck 43 ft wide.

Who owns SB US 218 over Crooked Creek?

It is owned by the State Highway Agency.