07-11-23 Agenda Packet - Laserfiche WebLink

Home Browse Search

expected to be ready within a month or two. David is interested in the level of the bottom of the lake for sediment analysis as a part of managing the street sewer system. In contrast, this project is focused on the lake surface level. The KLIDB is also concerned about growth in the lake’s bottom level due to sediment infill from street sewers and shoreline erosion. These two topics may merge in the future. 6.2. Plan for 2023 removal of excess lake weeds and debris. Susan Johnson 6.2.1 Background: Holt has scheduled another lake weed removal day in August 2023 for lake property owners interested in participating. This is classified as a voluntary effort and not an official board action. However, the board is aware of and supportive of this effort. Discussion: No new developments. Tabled until July meeting. 6.3. Plan for 2023 control of invasive purple loosestrife. Renée Marino 6.3.1 Background: After the Purple Loosestrife infestation event in 2022, it will be important to monitor and mitigate new growth in the near future, since seeds from the plants removed in 2022 will most likely continue to germinate for several years going forward. Discussion: Renée shared a DNR chart for identifying and treating Purple Loosestrife. Kent Stennes noted that the Wisconsin lake on which he was a lake improvement district board member had had significant Purple Loosestrife populations. They were successful in treating some plants by cutting and applying chemicals under a permit from Wisconsin’s DNR and others by introducing beetles. Those methods are shown on the DNR chart. Renée and Jim plan to search for plant sightings with their canoe again this year. Susan Johnson offered to go door-to-door to notify residents with plants on their shorelines. Kent Stennes agreed to help lead this effort. 6.4. Possibility of initiating a new study to identify status and refresh list of BMPs for future management of Karth Lake: David Swearingen 6.4.1 Background: The most recent Karth Lake study and BMP identification was performed in 2009. The board would like to identify a plan to be included in a follow-up assessment of Karth Lake’s current health and opportunities for improvement (BMPs). David Swearingen described current and future grant opportunities that the City of Arden Hills will pursue and extended to include Karth Lake. Discussion: David found that requesting that Karth Lake be included in RCWD’s resiliency study can be done through RCWD’s Matt Kocian and Houston Engineering’s Bret Zimmerman. David plans to write grant proposals for this at the end of 2023. David also discussed drainage pond sediment growth and management analysis that his team will be contracting for under 2024 PMP (pavement replacement) plans. When the west side of Karth Lake undergoes its PMP in 2026, he hopes to use this 2024 work to help get funding to study Karth Lake’s sediment growth and management. This item is on hold for now.