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Algae control study

The City of Calgary will test various algae control technologies in select storm ponds from 2016 to 2018, June through August. A total of five storm ponds have been selected for this purpose:

  • Panorama Hills Upper Pond (95WPA)
  • Taravista Pond L (47WPA)
  • South cell of the Shepard Wetland
  • Storm Pond 88 in Aspen Woods - treated pond
  • Storm Pond 89 in Aspen Woods - control pond

Panorama Hills Upper Pond, Taravista Pond, and South Cell of the Shepard Wetland

In June 2016, Limnos Environmental Ltd. (city contractor) applied a mixture of lime, calcium peroxide and Phoslock® in Panorama Hills Upper Pond, Taravista Pond and the south cell of the Shepard Wetland. This was a one-time application at different spots throughout the ponds.

Starting in July, citizens will see floating ultrasonic transducers in the ponds over the course of two weeks. These transducers will be connected by an extension cord to a battery box on shore. Avoid contact with any equipment or materials.

Throughout the summer, other products such as naturally occurring microbes and enzymes, a food-based dye to help block solar light and limited amounts of copper sulfite based pesticide will be added to the storm ponds in specific areas. They don’t pose any health risks and are safe for the environment. It is strongly advised that you avoid contact with the water and plants found in the storm ponds.

Algae Control Study in the community of Aspen Woods

These two ponds are located north of 17th Ave S.W. and on either side of 85th St. S.W. Storm Pond 89 is on the west side of 85th St. S.W. and will be the control pond (no treatment will be applied).

Storm Pond 88 is on the east side of 85th St. S.W., bordering the Aspen Landing Shopping Centre. It will be subject to algae control testing using naturally occurring biological agents. The product used for testing does not pose any health or safety risks to the community or the environment. The water feature at Aspen Woods Landing Shopping Centre will shut down temporarily. This is to achieve ideal pond conditions required to evaluate algae control technology.

Both ponds will adhere to the same monitoring and analysis protocols. However, it is important to avoid contact with the water and plants found in this storm pond.