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

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 Contract Manufacturing, specifically metal based fabrication, welding, powder coating, and assembly of products for a variety of industries including power sports, agricultural, construction, and turf care equipment.  Our modern facility is abundantly versatile, featuring a variety of machines that provide production capabilities for an array of diverse products and projects.  

One of our premier lines of field machinery is Ground Effect. We offer three great products to help you complete the toughest jobs. The Soil Finisher, Sidewalk and Curb Edger, and Vegetation and Sod Cutter are all built and designed at our state-of-the-art Spencer facility.

In 2013 Simonsen Iron Works was purchased by Thurston Manufacturing Company of Thurston, Nebraska.  We are excited about the new relationship bringing expanded manufacturing capacities to our current and future customers.  Since 1971 Thurston Manufacturing Company has been providing high quality products to the Agricultural and Construction Industries through their BLU-JET and Circle R Side Dump product lines, as well as providing contract manufacturing services to numerous OEM customers.

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