FM over Griffin Creek

Fair

Crawford County, Iowa · 082391701 · Structure no. 000000000126680

Built: 1962; 63 years old
Condition: Fair; inspected April 2023
Type: Slab; Concrete Continuous
Length: 101 ft; 3 main spans
Daily traffic: 349; 2022 count
Owner: County; County Highway Agency

About this bridge

FM over Griffin Creek is a concrete continuous slab carrying FM over Griffin Creek in Crawford County, Iowa. It was built in 1962, so it is 63 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 349 vehicles a day, roughly 18% of them trucks, projected to reach 349 by 2043. The structure is 101 ft (30.8 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesFM

CrossesGriffin Creek

Location082391701

RouteCounty Highway 0

CountyCrawford County

StateIowa

Coordinates41.92111, -95.41457

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 inspectionApril 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 alignment6: Equal to present minimum criteria

Operating rating56.3 US tons

Inventory rating33.7 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 20

Structure length101 ft (30.8 m)

Longest span39 ft (11.9 m)

Deck width30 ft (9.1 m)

Roadway width28 ft (8.5 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic349 (2022)

Projected traffic349 by 2043

Trucks18%

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 proposedNone recorded

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Griffin Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is FM over Griffin 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 April 2023.

How much traffic does FM over Griffin Creek carry?

About 349 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is FM over Griffin Creek?

The structure is 101 ft (30.8 m) long with a longest span of 39 ft (11.9 m) and a deck 30 ft wide.

Who owns FM over Griffin Creek?

It is owned by the County Highway Agency.