The Wisconsin Department of Natural Resources (DNR) is holding a series of webinars to introduce “Total Maximum Daily Loads for Total Phosphorus and Total Suspended Solids in the Northeast Lakeshore Basin” (TMDL).

TMDL is a regulatory term in the U.S. Clean Water Act, describing a plan for restoring impaired waters that defines the maximum amount of a pollutant that a body of water can receive while still meeting water quality standards.

The 2017-19 state budget included funding for a TMDL study of the rivers of Door, Kewaunee, Manitowoc and Sheboygan counties and the streams that lie in and between the Ahnapee River watershed and the Sauk Creek watershed.

The project has entailed about two years of monitoring and data collection, followed by assembling the data and developing computer models, with final reports due in 2021.

The four-part series will begin at 10 a.m. Thursday (June 25) and is designed to provide an overview of the TMDL development process, TMDL implementation, and data sets used for the current watershed modeling effort.

The first webinar can be joined at this link. Each webinar will include a Q&A session after the presentation.

This information was to be presented at a public meeting in April at the Kewaunee County Fairgrounds, but was canceled due to the state’s “Safer at Home” shelter-in-place orders.

The first webinar, “TMDL process and introduction to the NE Lakeshore TMDL,” is expected to feature an overview of the TMDL development and implementation process and an introduction to the specific project.

A second webinar is scheduled for 10 a.m. July 9 and includes an overview of the stream monitoring methods, followed by a summary of the impaired bodies of water and data for each of the three major drainage basins in the project: the Ahnapee, Kewaunee and Twin Rivers, Manitowoc River and Sheboygan River.

The third and fourth webinars are tentatively scheduled for later in July and late August, respectively.

For the latest information, subscribe to the NE Lakeshore TMDL email list.