About Us.
Your Sitework Starts Here
Adam Staudenmaier brings over 25 years of union contracting experience to every job. After decades working on pipeline and excavation crews, he launched Prime Earthworks to offer high-quality work without the big-company pricing or delays. Based in Marinette, Wisconsin, Adam serves homeowners, builders, and landowners across Northeast Wisconsin and the Upper Peninsula.
From grading and land clearing to lake excavation and commercial site prep, we help shape properties across communities like Peshtigo, Crivitz, Oconto, Menominee, and beyond.
We’re a fully insured operation backed by years of union training and field experience—committed to doing things right the first time. When you work with Prime Earthworks, you deal directly with the owner—no middlemen, no sales reps, just honest, hands-on work.
Why Choose Us?
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Fully insured and licensed
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Union-trained and field-tested
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Quality equipment and professional crew
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Competitive pricing and honest service
Let’s build something strong—starting from the ground up.
Legacy in the Trades
His commitment to the trades runs deep—Adam worked for many years alongside his father, Dennis Staudenmaier, a proud member of IUOE Local 139 for over 45 years. Dennis instilled in him the value of hard work, doing the job right, and treating people fairly. Those same principles guide every job at Prime Earthworks today.
Here’s to you Denny.
“I’ve been moving dirt for over 25 years.
I don’t cut corners, I show up, and I stand behind every job I take on.”
— Adam Staudenmaier, Owner / Operator
Partner with a Contractor Who Knows the Land
We work directly with realtors, landowners, and developers to prepare sites for sale, build-ready condition, or long-term investment. Whether you're subdividing land, building a driveway, or clearing a lot for a future home, we’re the trusted local contractor that gets it done right.