Case Study: Balanced Aquatic Plant Environment Achieved with Lake Weed Cutter

BACKGROUND INFORMATION

Natural, glacial kettle lake formed over 12,000 years ago
Considered a “Priority Lake” meaning it is considered an outstanding natural resource and needing protection and long term management
423 acres of lake surface, 1.43 miles long with 4.13 miles of shoreline
Maximum depth is 44’ with an average depth of 18’
Part of the Mississippi drainage area with a watershed are of 4,688 acres

Aquatic plants visible from birds eye view of Lake Ripley.

PROJECT CHALLENGE

Very developed shoreline increases nutrients entering the lake, resulting in aquatic plant growth and algae blooms
Popular recreational destination requires a balance between a healthy aquatic ecosystem and recreational access
Invasive Eurasian watermilfoil (EWM), curly-leaf pondweed, and non-native zebra mussels are present
Harvester permitted to remove invasives and to cut specific navigational lanes

THE SOLUTION

Aquatic Weed Harvesting is a long-term commitment on Lake Ripley. Efforts have successfully reduced invasive EWM by 57%, with over 1,000 loads of harvested plants removed from the lake.

Aquarius HM-420 aquatic weed harvester

Aquatic plants are vital for water quality, algae control, sediment stabilization, and shoreline protection. The District recognizes the importance of riparian access and strives to maintain a balanced aquatic plant environment.