Marshall Lake is an 87-acre drainage lake with a maximum depth of 17 feet. It is located within the Wisconsin River drainage basin northwest of the town of Conover in Vilas County. As determined from Secchi disk transparency data collected over the past 14 years, the lake has relatively high water clarity and can be classified as a mesotrophic system. However, in recent years, riparian property owners have expressed concerns regarding apparent increases in aquatic plant growth around the lake which is interfering with navigation and recreational activities.

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The Town of Conover is sponsoring a small scale lake planning grant to study aquatic plants in Marshall Lake, Vilas County. The project will focus on performing a point-intercept (PI) aquatic plant survey and completing a report from the data gathered. Project activities include: 1) Conduct PI survey; 2) Develop final report that summarizes data collected and provides management guidance.