866-382-9387  Winter Hours: Monday - Friday 8:00-5:00  Saturdays 9-1
UPPER IOWA MARINE, INC. 1651 HWY 9 E. DECORAH, IA 52101 563-382-9387
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Denis Tweten - Owner/Manager

Denis has been in the marine business for almost 40 years. He started working in the business as a mechanic before going in to business on his own in 1988.

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Jason Tweten - Owner/Manager

Jason has been working in the business since 1988 part time and eventually started full time in 2004. In 2019 he bought in to the business.




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Shawn Tweten - Service Technician
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Anthony Olson - Service Technician
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Charlie Hageman - Sales/Service Technician
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