5th Street over Iais RR

Fair

Adair County, Iowa · A72000525 · Structure no. 000000000000060

Built: 1923; 102 years old
Condition: Fair; inspected March 2023
Type: Arch - Deck; Concrete Continuous
Length: 205 ft; 3 main spans
Daily traffic: 3,562; 2023 count
Owner: City; City or Municipal Highway Agency

About this bridge

5th Street over Iais RR is a concrete continuous arch - deck carrying 5th Street over Iais RR in Adair County, Iowa. It was built in 1923, so it is 102 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 3,562 vehicles a day, projected to reach 3,562 by 2043. The structure is 205 ft (62.5 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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Carries5th Street

CrossesIais RR

LocationA72000525

RouteCity Street 0

CountyAdair County

StateIowa

Coordinates41.49687, -94.64341

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
Deck	8 Very Good	No problems noted.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionMarch 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourBridge not over waterway

Structural evaluation6: Equal to present minimum criteria

Deck geometry2: Basically intolerable, requiring high priority of replacement

Approach roadway alignment7: Better than present minimum criteria

Operating rating64.3 US tons

Inventory rating50.4 US tons

Structure

Structure typeArch - Deck

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 15

Structure length205 ft (62.5 m)

Longest span80 ft (24.4 m)

Deck width33 ft (10 m)

Roadway width24 ft (7.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,562 (2023)

Projected traffic3,562 by 2043

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesRailroad

Detour if closed3.1 mi (5 km)

TollOn a free road

National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency

Maintained byCity or Municipal Highway Agency

Historic statusListed on the National Register of Historic Places

Work proposedWidening with deck rehabilitation or replacement

Estimated improvement cost—

NavigationNot applicable (no waterway)

Frequently asked questions

When was 5th Street over Iais RR built?

It was built in 1923, making it 102 years old in 2025.

What condition is 5th Street over Iais RR 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 March 2023.

How much traffic does 5th Street over Iais RR carry?

About 3,562 vehicles per day (2023 count).

How long is 5th Street over Iais RR?

The structure is 205 ft (62.5 m) long with a longest span of 80 ft (24.4 m) and a deck 33 ft wide.

Who owns 5th Street over Iais RR?

It is owned by the City or Municipal Highway Agency.