Mackall, Crounse & Moore, PLC has joined Dewitt Ross & Stevens S.C.

The newly formed DeWitt Mackall Crounse & Moore S.C. will provide clients with enhanced legal services
and efficiencies as well as access to more than 100 attorneys practicing in nearly 30 areas of
law in Wisconsin and Minnesota.

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Timm P. Speerschneider

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Becky L. LeDonne

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Keeping up with rapidly changing environmental regulations is not an easy task. Failure to do so can result in significant monetary penalties and even jail time. That is why many clients from all economic sectors (agriculture, mining, manufacturing, and transportation) depend on Timm to keep them abreast and to defend them if they find themselves facing an enforcement action. He focuses his practice in the areas of Administrative Law, Environmental Law and Land Use.


Timm’s clients include many trade associations such as the Wisconsin Transportation Builders Association, Wisconsin Institute of Scrap Recycling Industries, Association of Wisconsin Snowmobile Clubs and Wisconsin Cranberry Growers Association, where he is responsible for keeping them up to speed on environmental regulations. Timm lectures at many of the associations’ meetings regarding developments in environmental law and enforcement.

He also represents many individual entities regarding environmental matters, including mining companies (Rio Tinto, Aquila), paper mills (Flambeau River Papers), waste disposal companies (Advanced Disposal Services, Republic Services), road builders (Payne & Dolan), and many small and large farming operations. He has assisted these entities in expanding their businesses, as well as defended them against enforcement actions, both from the government and citizens. He successfully handled the precedent-creating arbitration before the Waste Facility Siting Board which involved tens of millions of dollars in landfill impact fees.

Client Recommendation

“I have worked with Timm on a wide variety of environmental, land-use and property related issues for almost 20 years. His experience, expertise and creativity have led to excellent results. Most importantly, Timm understands what is important to his clients and is extremely efficient and responsive.” – Mark Filmanowicz, Chief Legal Officer of Payne & Dolan, Inc.


Our Locations

We are currently limiting the amount of outside visitors to the firm.  

Please work directly with your attorney who will coordinate any onsite visits to ensure the safety of our clients and colleagues.


2 East Mifflin Street, Suite 600
Madison, WI 53703
(608) 255-8891
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Greater Milwaukee

13845 Bishop’s Drive, Suite 300
Brookfield, WI 53005
(262) 754-2840
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2100 AT&T Tower,
901 Marquette Avenue
Minneapolis, MN 55402
(612) 305-1400
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Get to know us

DeWitt LLP is one of the ten largest law firms based in Wisconsin, with an additional presence in Minnesota. It has nearly 140 attorneys practicing in Madison, Metropolitan Milwaukee and Minneapolis in over 30 legal practice areas, and has the experience to service clients of all scopes and sizes.

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We are an active and proud member of Lexwork International, an association of mid-sized independent law firms in major cities located throughout the Americas, Europe and Asia and an active member of SCG Legal, an association of more than 140 independent law firms serving businesses in all 50 state capitals and major commercial centers around the world.


Best Lawyers 2013 – 2020
Super Lawyers 2020
Compass Award 2012
Top 100 Lawyers: National Trial Lawyers Association


While we would like to hear from you, we cannot represent you until we know that doing so will not create a conflict of interest. Accordingly, please do not send us any information about any matter that may involve you until you receive a written statement from us that we represent you (an “engagement letter”). You will not be a client of the firm until you receive such an engagement letter.

The best way for you to initiate a possible representation is to call DeWitt LLP at 608-255-8891. We will make every effort to put you in touch with a lawyer suited to handle your matter. When you receive an engagement letter from one of our lawyers, you will be our client and we may exchange information freely.

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