FM over Coon Creek

Fair

Iowa County, Iowa · 081111305 · Structure no. 000000000191431

Built: 1997; 28 years old
Condition: Fair; inspected March 2024
Type: Slab; Concrete Continuous
Length: 115 ft; 3 main spans
Daily traffic: 1,490; 2022 count
Owner: County; County Highway Agency

About this bridge

FM over Coon Creek is a concrete continuous slab carrying FM over Coon Creek in Iowa County, Iowa. It was built in 1997, so it is 28 years old, younger 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 1,490 vehicles a day, roughly 19% of them trucks, projected to reach 1,490 by 2044. The structure is 115 ft (35.1 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesFM

CrossesCoon Creek

Location081111305

RouteCounty Highway 0

CountyIowa County

StateIowa

Coordinates41.82817, -92.07856

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	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	7 Good	Some minor problems.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionMarch 2024

Inspection intervalevery 48 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 adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating91.9 US tons

Inventory rating55.1 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length115 ft (35.1 m)

Longest span44 ft (13.4 m)

Deck width33 ft (10.1 m)

Roadway width31 ft (9.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,490 (2022)

Projected traffic1,490 by 2044

Trucks19%

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—

NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Coon Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is FM over Coon 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 March 2024.

How much traffic does FM over Coon Creek carry?

About 1,490 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is FM over Coon Creek?

The structure is 115 ft (35.1 m) long with a longest span of 44 ft (13.4 m) and a deck 33 ft wide.

Who owns FM over Coon Creek?

It is owned by the County Highway Agency.