US Bridges

NB US 218 over Old Man Creek

Good

Johnson County, Iowa · 0.7 MI S of S Jct. SR F62 · Structure no. 000000000604590

Built
1982
43 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
267 ft
3 main spans
Daily traffic
9,650
2022 count
Owner
State
State Highway Agency

About this bridge

NB US 218 over Old Man Creek is a prestressed concrete stringer/multi-beam or girder carrying NB US 218 over Old Man 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,650 vehicles a day, roughly 16% of them trucks, projected to reach 9,650 by 2043. The structure is 267 ft (81.4 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNB US 218
CrossesOld Man Creek
Location0.7 MI S of S Jct. SR F62
RouteU.S. Route 218
StateIowa
Coordinates41.54433, -91.54575
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating96.1 US tons
Inventory rating40.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length267 ft (81.4 m)
Longest span92 ft (28 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,650 (2022)
Projected traffic9,650 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 NB US 218 over Old Man Creek built?

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

What condition is NB US 218 over Old Man 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 July 2023.

How much traffic does NB US 218 over Old Man Creek carry?

About 9,650 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is NB US 218 over Old Man Creek?

The structure is 267 ft (81.4 m) long with a longest span of 92 ft (28 m) and a deck 43 ft wide.

Who owns NB US 218 over Old Man Creek?

It is owned by the State Highway Agency.