FM over Middle Creek

Fair

Mahaska County, Iowa · 076151606 · Structure no. 000000000237305

Built: 1971; 54 years old
Condition: Fair; inspected December 2023
Type: Slab; Concrete Continuous
Length: 127 ft; 3 main spans
Daily traffic: 300; 2022 count
Owner: County; County Highway Agency

About this bridge

FM over Middle Creek is a concrete continuous slab carrying FM over Middle Creek in Mahaska County, Iowa. It was built in 1971, so it is 54 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 300 vehicles a day, projected to reach 300 by 2043. The structure is 127 ft (38.7 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesFM

CrossesMiddle Creek

Location076151606

RouteCounty Highway 0

CountyMahaska County

StateIowa

Coordinates41.38953, -92.58885

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 inspectionDecember 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 alignment7: Better than present minimum criteria

Operating rating57.5 US tons

Inventory rating33.5 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 20

Structure length127 ft (38.7 m)

Longest span49 ft (14.9 m)

Deck width30 ft (9.1 m)

Roadway width28 ft (8.5 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2022)

Projected traffic300 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 statusNot eligible for the National Register of Historic Places

Work proposedRehabilitation because of general structure deterioration or inadequate strength

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Middle Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is FM over Middle 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 December 2023.

How much traffic does FM over Middle Creek carry?

About 300 vehicles per day (2022 count).

How long is FM over Middle Creek?

The structure is 127 ft (38.7 m) long with a longest span of 49 ft (14.9 m) and a deck 30 ft wide.

Who owns FM over Middle Creek?

It is owned by the County Highway Agency.