US Bridges

Ansborough Ave over US 218

Good

Black Hawk County, Iowa · In Waterloo · Structure no. 000000000601080

Built
1991
34 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
194 ft
2 main spans
Daily traffic
5,414
2022 count
Owner
State
State Highway Agency

About this bridge

Ansborough Ave over US 218 is a prestressed concrete stringer/multi-beam or girder carrying Ansborough Ave over US 218 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 5,414 vehicles a day, roughly 3% of them trucks, projected to reach 5,414 by 2043. The structure is 194 ft (59.1 m) long and 98 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesAnsborough Ave
CrossesUS 218
LocationIn Waterloo
RouteCity Street 0
CountyBlack Hawk County
StateIowa
Coordinates42.50811, -92.37545
Functional classUrban Minor 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.
Superstructure8 Very GoodNo problems noted.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating99.6 US tons
Inventory rating36.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length194 ft (59.1 m)
Longest span96 ft (29.3 m)
Deck width98 ft (29.8 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,414 (2022)
Projected traffic5,414 by 2043
Trucks3%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 Ansborough Ave over US 218 built?

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

What condition is Ansborough Ave over US 218 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 Ansborough Ave over US 218 carry?

About 5,414 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Ansborough Ave over US 218?

The structure is 194 ft (59.1 m) long with a longest span of 96 ft (29.3 m) and a deck 98 ft wide.

Who owns Ansborough Ave over US 218?

It is owned by the State Highway Agency.