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Kenmore seeks aeration and targeted treatments as cyanobacteria and invasive plants appear along shorelines
Summary
City staff and consultants recommended installing aeration at the lagoon by Tawquharis Park and continuing a combination of mechanical, herbicide and monitoring work at Logboom Park and Arrowhead Point after recent algae and plant growth and citizen-sampled toxins were found.
Kenmore's Environmental Services director and consultants gave an update on aquatic vegetation and harmful algal blooms at city shorelines and recommended a mix of short- and long-term measures including aeration, targeted algaecide/phosphorus-inactivation treatments, mechanical skimming and expanded monitoring.
Richard Sawyer, the city's environmental services director, told the council the city's ongoing aquatic vegetation management has relied on diver-assisted suction dredging for small-scale removal and shore raking, but those methods are costly and scale poorly for larger open-water areas. Staff and Herrera Environmental recommended early-season herbicide treatments targeted at…
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