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Residents around Long Lake had the opportunity to dive deep into the science and management strategies of this local treasure during a presentation hosted by Karen Kill of the Browns Creek Watershed District. This event brought together a panel of experts, including Ann Wilkinson (PhD limnologist), Pat Conrad (biologist), Ryan Fleming (district engineer), and Brett Staud (Washington Conservation District), to shed light on key topics related to the lake’s health, challenges, and ongoing improvements.
Here’s a breakdown of the critical points discussed:
Lake Dynamics and Nutrient Loading
Nutrient runoff from surrounding development and internal sediment release significantly affects water quality, contributing to algal blooms and diminishing biodiversity. Preventing excessive nutrient loading is vital for a balanced ecosystem.
Aquatic Vegetation and Fish Populations
Native aquatic plants dominate Long Lake, supporting its ecosystem. However, past studies noted invasive species like Eurasian watermilfoil. Fish populations, including black bullheads (historically 90%), can stir sediments and reduce water quality. Maintaining native plant and fish diversity is key to a healthy lake.
Shoreline and Habitat Conditions
Natural shorelines help reduce erosion, filter runoff, and provide habitats for wildlife. Developed shorelines, however, contribute to nutrient loading. Residents were encouraged to explore native plant restoration and other best management practices (BMPs).
Chloride Pollution
Excess chloride, a challenging "forever" pollutant, has placed Long Lake on the impaired waters list. Efforts like smart salting practices and legislative support aim to reduce chloride levels.
Water Quality Improvements
The lake’s health is improving! Phosphorus levels and water clarity now meet state standards, with the lake’s trophic status upgraded to mesotrophic. It earned a B+ grade in 2023, signaling progress toward removal from the impaired waters list.
Flood Risk Management
Long Lake faces significant flood risks due to rapid water level changes during storms. While the 2004 outlet structure provides some stabilization, new data prompted updated flood assessments. Recent infrastructure upgrades, including road elevations, have reduced risks, but ongoing collaboration and community input remain essential.
Actionable Strategies for Residents
Shoreline Management: Restore native plants, preserve downed wood, and anchor logs to enhance aquatic habitats.
Turf Management: Use smart mowing techniques and avoid chemical overuse to minimize runoff.
Rain Gardens and Infiltration Practices: These can improve stormwater absorption while enhancing aesthetics and supporting wildlife.
Community Resources and Support
Local organizations like the Browns Creek Watershed District and Washington Conservation District offer free consultations, technical assistance, and grant programs to help residents protect water quality and implement BMPs.
Looking Ahead
Residents raised important questions about balancing ecological health with recreational usability and minimizing environmental impacts from upcoming developments, like the Lakeview Hospital project. Coordination between local stakeholders continues to ensure sustainable outcomes.
This presentation highlighted the importance of proactive efforts to protect Long Lake’s water quality and ecosystem, aligning closely with Sustainable Stillwater MN’s mission. Our Protect Our Waters workgroup has been actively addressing one of the issues discussed: chloride pollution.
In November and December, volunteers distributed flyers promoting smart salting practices to reduce harmful runoff during winter months. By encouraging minimal salt use, proper application techniques, and the adoption of environmentally friendly alternatives, our workgroup is helping residents play a direct role in safeguarding our local waters.
Together, we can ensure Long Lake continues its path toward resilience and health.
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