FM over Long Creek

Fair

Louisa County, Iowa · 074042306 · Structure no. 000000000224131

Built: 1987; 38 years old
Condition: Fair; inspected May 2024
Type: Slab; Concrete Continuous
Length: 177 ft; 4 main spans
Daily traffic: 630; 2022 count
Owner: County; County Highway Agency

About this bridge

FM over Long Creek is a concrete continuous slab carrying FM over Long Creek in Louisa County, Iowa. It was built in 1987, so it is 38 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 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 630 vehicles a day, roughly 11% of them trucks, projected to reach 630 by 2044. The structure is 177 ft (54 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesFM

CrossesLong Creek

Location074042306

RouteCounty Highway 0

CountyLouisa County

StateIowa

Coordinates41.19206, -91.28359

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

Last inspectionMay 2024

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 alignment7: Better than present minimum criteria

Operating rating56.4 US tons

Inventory rating33.8 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans4

Design loadH 20

Structure length177 ft (54 m)

Longest span49 ft (14.9 m)

Deck width32 ft (9.8 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic630 (2022)

Projected traffic630 by 2044

Trucks11%

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 proposedOther structural work, including hydraulic replacements

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Long Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is FM over Long 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 2024.

How much traffic does FM over Long Creek carry?

About 630 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is FM over Long Creek?

The structure is 177 ft (54 m) long with a longest span of 49 ft (14.9 m) and a deck 32 ft wide.

Who owns FM over Long Creek?

It is owned by the County Highway Agency.