US Bridges

50th Ave over Middle South Creek

Fair

Warren County, Iowa · 077250200 · Structure no. 000000000335371

Built
1971
54 years old, rebuilt 2016
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
77 ft
3 main spans
Daily traffic
144
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

50th Ave over Middle South Creek is a concrete continuous slab carrying 50th Ave over Middle South Creek in Warren County, Iowa. It was built in 1971 and reconstructed in 2016, so it is 54 years old, older 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 144 vehicles a day, projected to reach 144 by 2043. The structure is 77 ft (23.5 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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Carries50th Ave
CrossesMiddle South Creek
Location077250200
RouteCity Street 0
CountyWarren County
StateIowa
Coordinates41.49774, -93.71225
Functional classUrban Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum 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 rating41.1 US tons
Inventory rating24.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length77 ft (23.5 m)
Longest span29 ft (8.8 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic144 (2021)
Projected traffic144 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 50th Ave over Middle South Creek built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2016.

What condition is 50th Ave over Middle South Creek 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 May 2023.

How much traffic does 50th Ave over Middle South Creek carry?

About 144 vehicles per day (2021 count).

How long is 50th Ave over Middle South Creek?

The structure is 77 ft (23.5 m) long with a longest span of 29 ft (8.8 m) and a deck 26 ft wide.

Who owns 50th Ave over Middle South Creek?

It is owned by the City or Municipal Highway Agency.