US Bridges

1st Ave over Clear Creek

Good

Johnson County, Iowa · 000000000 · Structure no. 000000000002580

Built
1969
56 years old, rebuilt 2010
Condition
Good
inspected June 2023
Type
Slab
Concrete Continuous
Length
150 ft
3 main spans
Daily traffic
23,500
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

1st Ave over Clear Creek is a concrete continuous slab carrying 1st Ave over Clear Creek in Johnson County, Iowa. It was built in 1969 and reconstructed in 2010, so it is 56 years old, older 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 23,500 vehicles a day, roughly 3% of them trucks, projected to reach 23,500 by 2042. The structure is 150 ft (45.7 m) long and 98 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries1st Ave
CrossesClear Creek
Location000000000
RouteCity Street 0
CountyJohnson County
StateIowa
Coordinates41.67038, -91.56547
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating82.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span59 ft (18 m)
Deck width98 ft (29.9 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,500 (2022)
Projected traffic23,500 by 2042
Trucks3%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost$667,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 1st Ave over Clear Creek built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2010.

What condition is 1st Ave over Clear 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 June 2023.

How much traffic does 1st Ave over Clear Creek carry?

About 23,500 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 1st Ave over Clear Creek?

The structure is 150 ft (45.7 m) long with a longest span of 59 ft (18 m) and a deck 98 ft wide.

Who owns 1st Ave over Clear Creek?

It is owned by the City or Municipal Highway Agency.