US Bridges

NB US 218 over 4th 5th 6th & W Park

Good

Black Hawk County, Iowa · .4 MI S of Jct. NB US 218 · Structure no. 000000000606200

Built
1991
34 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,317 ft
18 main spans
Daily traffic
12,650
2022 count
Owner
State
State Highway Agency

About this bridge

NB US 218 over 4th 5th 6th & W Park is a prestressed concrete stringer/multi-beam or girder carrying NB US 218 over 4th 5th 6th & W Park in Black Hawk County, Iowa. It was built in 1991, so it is 34 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 12,650 vehicles a day, roughly 11% of them trucks, projected to reach 12,650 by 2043. The structure is 1,317 ft (401.4 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNB US 218
Crosses4th 5th 6th & W Park
Location.4 MI S of Jct. NB US 218
RouteU.S. Route 218
CountyBlack Hawk County
StateIowa
Coordinates42.49154, -92.33939
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating94 US tons
Inventory rating54 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans18
Design loadHS 20
Structure length1,317 ft (401.4 m)
Longest span92 ft (28 m)
Deck width59 ft (18.1 m)
Roadway width56 ft (17.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,650 (2022)
Projected traffic12,650 by 2043
Trucks11%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was NB US 218 over 4th 5th 6th & W Park built?

It was built in 1991, making it 34 years old in 2025.

What condition is NB US 218 over 4th 5th 6th & W Park 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 September 2023.

How much traffic does NB US 218 over 4th 5th 6th & W Park carry?

About 12,650 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is NB US 218 over 4th 5th 6th & W Park?

The structure is 1,317 ft (401.4 m) long with a longest span of 92 ft (28 m) and a deck 59 ft wide.

Who owns NB US 218 over 4th 5th 6th & W Park?

It is owned by the State Highway Agency.