US Bridges

FM 540th ST over Stream

Fair

Johnson County, Iowa · 078052001 · Structure no. 000000000202970

Built
1955
70 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
33 ft
1 main span
Daily traffic
880
2021 count
Owner
County
County Highway Agency

About this bridge

FM 540th ST over Stream is a concrete slab carrying FM 540th ST over Stream in Johnson County, Iowa. It was built in 1955, so it is 70 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 880 vehicles a day, projected to reach 880 by 2043. The structure is 33 ft (10.1 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesFM 540th ST
CrossesStream
Location078052001
RouteCounty Highway 0
CountyJohnson County
StateIowa
Coordinates41.55474, -91.45802
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span27 ft (8.2 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic880 (2021)
Projected traffic880 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 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 FM 540th ST over Stream built?

It was built in 1955, making it 70 years old in 2025.

What condition is FM 540th ST over 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 2023.

How much traffic does FM 540th ST over Stream carry?

About 880 vehicles per day (2021 count).

How long is FM 540th ST over Stream?

The structure is 33 ft (10.1 m) long with a longest span of 27 ft (8.2 m) and a deck 31 ft wide.

Who owns FM 540th ST over Stream?

It is owned by the County Highway Agency.