FM over Johns Creek

Fair

Dubuque County, Iowa · 088023604 · Structure no. 000000000146961

Built: 1972; 53 years old
Condition: Fair; inspected May 2023
Type: Slab; Concrete Continuous
Length: 78 ft; 3 main spans
Daily traffic: 680; 2021 count
Owner: County; County Highway Agency

About this bridge

FM over Johns Creek is a concrete continuous slab carrying FM over Johns Creek in Dubuque County, Iowa. It was built in 1972, so it is 53 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 680 vehicles a day, roughly 17% of them trucks, projected to reach 680 by 2043. The structure is 78 ft (23.8 m) long and 32 ft wide.

Location

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CarriesFM

CrossesJohns Creek

Location088023604

RouteCounty Highway 0

CountyDubuque County

StateIowa

Coordinates42.38355, -91.02933

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	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionMay 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 geometry6: Equal to present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating57.8 US tons

Inventory rating36.4 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 20

Structure length78 ft (23.8 m)

Longest span29 ft (8.8 m)

Deck width32 ft (9.8 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic680 (2021)

Projected traffic680 by 2043

Trucks17%

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 FM over Johns Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is FM over Johns Creek 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 May 2023.

How much traffic does FM over Johns Creek carry?

About 680 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is FM over Johns Creek?

The structure is 78 ft (23.8 m) long with a longest span of 29 ft (8.8 m) and a deck 32 ft wide.

Who owns FM over Johns Creek?

It is owned by the County Highway Agency.