US Bridges

US 218 over Quarry Lake & Wyth RD

Fair

Black Hawk County, Iowa · 2.5 Mi. S of Jct. Ia. #57 · Structure no. 000000000605800

Built
1989
36 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
756 ft
8 main spans
Daily traffic
29,000
2022 count
Owner
State
State Highway Agency

About this bridge

US 218 over Quarry Lake & Wyth RD is a prestressed concrete stringer/multi-beam or girder carrying US 218 over Quarry Lake & Wyth RD in Black Hawk County, Iowa. It was built in 1989, so it is 36 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 29,000 vehicles a day, roughly 8% of them trucks, projected to reach 29,000 by 2043. The structure is 756 ft (230.4 m) long and 123 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUS 218
CrossesQuarry Lake & Wyth RD
Location2.5 Mi. S of Jct. Ia. #57
RouteU.S. Route 218
CountyBlack Hawk County
StateIowa
Coordinates42.52477, -92.38899
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.8 US tons
Inventory rating50.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length756 ft (230.4 m)
Longest span97 ft (29.6 m)
Deck width123 ft (37.6 m)
Roadway width112 ft (34.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,000 (2022)
Projected traffic29,000 by 2043
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
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 US 218 over Quarry Lake & Wyth RD built?

It was built in 1989, making it 36 years old in 2025.

What condition is US 218 over Quarry Lake & Wyth RD 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 US 218 over Quarry Lake & Wyth RD carry?

About 29,000 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is US 218 over Quarry Lake & Wyth RD?

The structure is 756 ft (230.4 m) long with a longest span of 97 ft (29.6 m) and a deck 123 ft wide.

Who owns US 218 over Quarry Lake & Wyth RD?

It is owned by the State Highway Agency.