Crosby and Little Crosby Lakes

Crosby Lake

Crosby Lake is one of the only District water resources that is largely unmanaged. The lake is 48 acres in size with a maximum depth of 19 feet, part of a 197-acre watershed. It is located within the floodplain of the Mississippi River. As part of Crosby Farm Regional Park and the Mississippi National River and Recreation Area, the lake visited year-round, with ample opportunities for canoeing, hiking, and fishing.

Crosby Lake Health

Because the lake receives little local drainage, water quality of Crosby Lake is generally good, with total phosphorus concentrations below the state standard for shallow lakes. However, the lake is showing signs of pressure from high nutrient loads, invasive species such as carp and Curly-leaf pondweed, and altered hydrology. One of the unique aspects of Crosby Lake is that it resides in the floodplain of the Mississippi River. Therefore, the two water bodies exchange water under high-flow conditions, resulting in the potential exchange of nutrients and aquatic organisms. Flooding from the river is likely causing high nutrient concentrations in sediment, though such inundation is impossible to control.

How to Help Crosby Lake

CRWD encourages all District residents to get involved with protecting our shared water resources like Crosby Lake. Through volunteering, educational programs, our Citizen Advisory Group and the Master Water Stewards program, CRWD empowers people living in the District to take an active role in watershed management.

Learn how you can help
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Crosby Lake Projects

Crosby Lake Management Plan

In 2002, CRWD created a strategic plan that has guided the District and its partners to address Como Lake water quality priorities in conjunction with CRWD’s watershed management plan. The Como Lake plan identifies important lake management issues through input from key stakeholders, prioritizes the most critical issues and identifies implementation activities to improve water quality. The plan’s goals include, but are not limited to:

    • Reduce phosphorus loading by 60 percent.
    • Remove sediment deltas surrounding stormwater
    • Decrease sediment loads to the lake
    • Increase frequency of mechanical vegetation harvesting to twice per summer

In 2017, CRWD conducted a new Como Lake study to better understand what is causing the lake’s poor water quality. Based on the results of this study and ongoing monitoring, the District will create a new management plan for Como Lake. During 2018, CRWD will complete a community-driven planning process to update the Como Lake Strategic Management Plan. The new plan will build on the past two decades of work around the lake with a specific focus on management within the lake. Learn more about the Como Lake management planning process.