CO RD H22 over Small Stream

Fair

Louisa County, Iowa · 073022801 · Structure no. 000000000365525

Built: 1959; 66 years old
Condition: Fair; inspected June 2023
Type: Culvert; Concrete Continuous
Length: 21 ft; 2 main spans
Daily traffic: 440; 2022 count
Owner: County; County Highway Agency

About this bridge

CO RD H22 over Small Stream is a concrete continuous culvert carrying CO RD H22 over Small Stream in Louisa County, Iowa. It was built in 1959, so it is 66 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 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 440 vehicles a day, projected to reach 440 by 2043. The structure is 21 ft (6.4 m) long and 22 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesCO RD H22

CrossesSmall Stream

Location073022801

RouteCounty Highway 0

CountyLouisa County

StateIowa

Coordinates41.09017, -91.09616

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.

Component	Rating	Meaning
Channel and channel protection	7 Good	Some minor problems.
Culvert	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.

Last inspectionJune 2023

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

Deck geometry4: Meets minimum tolerable limits to be left in place as is

Waterway adequacy6: Equal to present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating61.8 US tons

Inventory rating37 US tons

Structure

Structure typeCulvert

MaterialConcrete Continuous

DeckNot applicable

Main spans2

Design loadH 20

Structure length21 ft (6.4 m)

Longest span10 ft (3 m)

Deck width22 ft (6.7 m)

Roadway width22 ft (6.7 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic440 (2022)

Projected traffic440 by 2043

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

OwnerCounty Highway Agency

Maintained byCounty Highway Agency

Historic statusNot eligible for the National Register of Historic Places

Work proposedOther structural work, including hydraulic replacements

Estimated improvement cost—

NavigationNot applicable (no waterway)

Frequently asked questions

When was CO RD H22 over Small Stream built?

It was built in 1959, making it 66 years old in 2025.

What condition is CO RD H22 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 June 2023.

How much traffic does CO RD H22 over Small Stream carry?

About 440 vehicles per day (2022 count).

How long is CO RD H22 over Small Stream?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 22 ft wide.

Who owns CO RD H22 over Small Stream?

It is owned by the County Highway Agency.