1701 38th Avenue West
Spencer, IA 51301
(712) 339-1290
Thank the heavens, the snow is melting! If you're from anywhere north of Missourri you're probably thinking this. Winter was hard and long and while that meant many got some extra income via snow plow season, many others have had a delay to their start of the year and are in fear of losing jobs that won't be able to be done.

We are here to tell you there's a better way. Our product line was designed to save you time...
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Ground Effect is an innovative attachment line for construction, farm or landscaping use. Our flagship product is the soil finisher that comes in 3 different sizes and has mounts for most skid steers, dingo style machines, or tractors. Fully adjustable gauge wheels, rubber torsion pivot points, and collapsible flex link design are the key elements to superior functionality. This attachment requires no external power...
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Get a Jump on Spring with a Ground Effect Soil Finisher  
It's spring, and if Mother Nature wreaked havoc on your lawn with wind, snow, ice and run offs you may have a mess to clean up. It’s not too late to make your plans on how to deal with these issues on a permanent basis. Dirt work now will help your lawn to look beautiful come summer. You'll be ahead of the game this summer when you see your seeded areas thrive,...
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The Ground Effect lineup of products are manufactured and assembled in our Simonsen Iron Works plant in Spencer, IA. We don't just manufacture our own products, we manufacture a variety of products for many known brands.

State-of-the-Art Manufacturing

Established in 1906, Simonsen Iron Works is a fully integrated, state-of-the-art, advanced manufacturing operation located in Spencer Iowa.  Simonsen specializes in...

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1701 38th Avenue West
Spencer, IA 51301
(712) 339-1290