US Bridges

1st Avenue over Muddy Creek

Good

Johnson County, Iowa · 080063204 · Structure no. 000000000359281

Built
1988
37 years old
Condition
Good
inspected June 2023
Type
Slab
Concrete Continuous
Length
128 ft
3 main spans
Daily traffic
6,625
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

1st Avenue over Muddy Creek is a concrete continuous slab carrying 1st Avenue over Muddy Creek in Johnson County, Iowa. It was built in 1988, so it is 37 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 6,625 vehicles a day, projected to reach 6,625 by 2042. The structure is 128 ft (39 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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Carries1st Avenue
CrossesMuddy Creek
Location080063204
RouteCity Street 0
CountyJohnson County
StateIowa
Coordinates41.70017, -91.56263
Functional classUrban Collector

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 protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length128 ft (39 m)
Longest span49 ft (14.9 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,625 (2022)
Projected traffic6,625 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCounty 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 1st Avenue over Muddy Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is 1st Avenue over Muddy 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 Avenue over Muddy Creek carry?

About 6,625 vehicles per day (2022 count).

How long is 1st Avenue over Muddy Creek?

The structure is 128 ft (39 m) long with a longest span of 49 ft (14.9 m) and a deck 32 ft wide.

Who owns 1st Avenue over Muddy Creek?

It is owned by the City or Municipal Highway Agency and maintained by the County Highway Agency.