FM over Turner Creek

Fair

Lyon County, Iowa · 100442201 · Structure no. 000000000230901

Built: 1980; 45 years old
Condition: Fair; inspected July 2023
Type: Slab; Concrete Continuous
Length: 100 ft; 3 main spans
Daily traffic: 71; 2022 count
Owner: County; County Highway Agency

About this bridge

FM over Turner Creek is a concrete continuous slab carrying FM over Turner Creek in Lyon County, Iowa. It was built in 1980, so it is 45 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 71 vehicles a day, projected to reach 71 by 2043. The structure is 100 ft (30.5 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesFM

CrossesTurner Creek

Location100442201

RouteCounty Highway 0

CountyLyon County

StateIowa

Coordinates43.47631, -96.02012

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

Last inspectionJuly 2023

Inspection intervalevery 48 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum criteria

Deck geometry7: Better than present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating61.7 US tons

Inventory rating38.5 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 20

Structure length100 ft (30.5 m)

Longest span39 ft (11.9 m)

Deck width33 ft (10.1 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic71 (2022)

Projected traffic71 by 2043

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed3.7 mi (6 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$30,000 (2023 estimate)

NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Turner Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is FM over Turner 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 July 2023.

How much traffic does FM over Turner Creek carry?

About 71 vehicles per day (2022 count).

How long is FM over Turner Creek?

The structure is 100 ft (30.5 m) long with a longest span of 39 ft (11.9 m) and a deck 33 ft wide.

Who owns FM over Turner Creek?

It is owned by the County Highway Agency.