Think Spring!

April 4, 2023

Does your project require a wetland delineation or wetland/waterway permit?
The growing season in Wisconsin is quickly drawing near! It’s time to start thinking about wetlands again. If you think you may have wetlands or waterways within your project site, reach out to our wetland ecologists who will help you determine the probability that wetlands may or may not be present. They will conduct a simple desktop review of available mapping including the Wisconsin Wetland Inventory, National Resource Conservation Service (NRCS) soils maps, topographic maps, and historical and recent aerial imagery. If wetlands are likely present, raSmith’s ecologists can perform a wetland delineation to keep your project on the fast track.

How soon can we begin delineating wetlands in Wisconsin?
Our wetland ecologists at raSmith typically begin their field delineations in mid-April in southeastern Wisconsin, but it may be a week or two later in other parts of the state. Signs that the growing season has begun include the emergence of herbaceous plants, early flowering plants, and bud burst on trees. Due to a limited number of growing season months in Wisconsin, there is a high demand for wetland delineations, and our field schedules fill up quickly. Don’t hesitate—contact one of our wetland ecologists as soon as possible so that we may determine if your project area contains wetlands. Our wetland team is highly experienced in wetland delineation and is here to assist you. We are also highly experienced with wetland and waterway permitting and can help you navigate the process.

Contact Us
Our ecologists have helped numerous clients with hundreds of wetland delineations and other ecological projects over the past two decades. If you would like to know more about wetland/waterway regulations and how they may affect your project, please contact our ecologist, Thomas Johns, at or (262) 317-3228.


TJ Johns provides ecological services with an emphasis on wetland delineation, tree surveys, GIS mapping, and other environmental project needs. For more information, contact us at (262) 317-3228 or email

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