Scope of Services:
Field and lab work was conducted to measure baseline water quality and limnology and derive estimates of fish population size in Duncan Lake at the Kemess Mine, British Columbia. The work was part of the permitting process for mine expansion under CEAA. Limnology findings developed information on trophic state and buffering capacity for acid loading. Hydroacoustics (echo sounding) and a combination of traps, nets, and setlines were used to determine fish abundance, species composition, and habitat use in the lake. Data linked from several years of surveys showed less than a 50% change in abundance of any species from year to year.
Relevance of the Project:
Disposal of waste rock in Duncan Lake was proposed as the best option for management of acid generating materials that would result from expansion of the Kemess Mine. A description of system limnology and accurate estimates of fish population size in the lake using latest available acoustic technology was required for decisions on environmental compensation and overall project permitting under the CEAA and BCEAA review process.