US Bridges

Chariot RD over Sm Stream

Fair

Clayton County, Iowa · 094061907 · Structure no. 000000000120760

Built
1953
72 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
27 ft
2 main spans
Daily traffic
73
2022 count
Owner
County
County Highway Agency

About this bridge

Chariot RD over Sm Stream is a concrete culvert carrying Chariot RD over Sm Stream in Clayton County, Iowa. It was built in 1953, so it is 72 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 73 vehicles a day, projected to reach 73 by 2044. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesChariot RD
CrossesSm Stream
Location094061907
RouteCounty Highway 0
CountyClayton County
StateIowa
Coordinates42.93935, -91.59344
Functional classRural Local

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 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25.6 US tons
Inventory rating18.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic73 (2022)
Projected traffic73 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Chariot RD over Sm Stream built?

It was built in 1953, making it 72 years old in 2025.

What condition is Chariot RD over Sm 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 Chariot RD over Sm Stream carry?

About 73 vehicles per day (2022 count).

How long is Chariot RD over Sm Stream?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m).

Who owns Chariot RD over Sm Stream?

It is owned by the County Highway Agency.