US Bridges

20th ST over Small Stream

Fair

Fayette County, Iowa · 091103401 · Structure no. 000000000150081

Built
1990
35 years old
Condition
Fair
inspected October 2024
Type
Culvert
Steel
Length
24 ft
2 main spans
Daily traffic
69
2022 count
Owner
County
County Highway Agency

About this bridge

20th ST over Small Stream is a steel culvert carrying 20th ST over Small Stream in Fayette County, Iowa. It was built in 1990, so it is 35 years old, younger 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 5 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 69 vehicles a day, projected to reach 69 by 2044. The structure is 24 ft (7.3 m) long.

Location

Open in Google Maps
Carries20th ST
CrossesSmall Stream
Location091103401
RouteCounty Highway 0
CountyFayette County
StateIowa
Coordinates42.65677, -92.01825
Functional classRural Minor 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic69 (2022)
Projected traffic69 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty 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 20th ST over Small Stream built?

It was built in 1990, making it 35 years old in 2025.

What condition is 20th ST 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 October 2024.

How much traffic does 20th ST over Small Stream carry?

About 69 vehicles per day (2022 count).

How long is 20th ST over Small Stream?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m).

Who owns 20th ST over Small Stream?

It is owned by the County Highway Agency.