US Bridges

F24 over Small Stream

Fair

Shelby County, Iowa · 081383501 · Structure no. 000000000047920

Built
1937
88 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
32 ft
1 main span
Daily traffic
417
2022 count
Owner
County
County Highway Agency

About this bridge

F24 over Small Stream is a concrete culvert carrying F24 over Small Stream in Shelby County, Iowa. It was built in 1937, so it is 88 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 417 vehicles a day, roughly 17% of them trucks, projected to reach 417 by 2044. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesF24
CrossesSmall Stream
Location081383501
RouteCounty Highway 0
CountyShelby County
StateIowa
Coordinates41.79201, -95.24726
Functional classRural Major 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span25 ft (7.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic417 (2022)
Projected traffic417 by 2044
Trucks17%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was F24 over Small Stream built?

It was built in 1937, making it 88 years old in 2025.

What condition is F24 over Small Stream 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 April 2024.

How much traffic does F24 over Small Stream carry?

About 417 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is F24 over Small Stream?

The structure is 32 ft (9.8 m) long with a longest span of 25 ft (7.6 m).

Who owns F24 over Small Stream?

It is owned by the County Highway Agency.