Cumulative effects assessment

Cumulative effects assessment

• Approach– Scoping:

• focus on VECs and VSECs where potential for cumulative effects existed - regardless of whether the effect was significant

– identified past, present and potential future projects

– identified residual effects for other projects

– identified the “zone of influence” for effects

– confirmed potential cumulative effects

• scope did not include a study of the cumulative effects of accidents and malfunctions

Cumulative effects assessment

Cumulative effects assessment

• Approach

Cumulative effects assessment

Cumulative effects assessment

• Approach– Effects Analysis

• determined the potential for induced effects

• set 25 years for temporal extent

• spatial extent varied with effect

Cumulative effects assessment

Cumulative effects assessment

• Types of cumulative effects

Cumulative effects assessment• Types of cumulative effects

Cumulative effects assessment

• Approach

Cumulative effects assessment

• Approach– Mitigation:

• appropriate mitigation identified, as required

– Significance

• compare effects against known or derived thresholds and land use plan expectations

– Follow-up

• program designed as needed

Cumulative effects assessment

• Potential cumulative effectsCategory Discipline Key Components

Terrestrial Mammals

Dolphin and Union caribou

Grizzly bear

Wolverine

Raptors (Peregrine falcon)

Biophysical Environment (VECs)

Marine Mammals

Beluga Whale

Narwhal

Bowhead whale

Ringed seal

Bearded seal

Harp seal

Walrus

Polar bear

Socio-economic

Employment and Labour Force

Business and Contracting

Training and Education

Drug and Alcohol Abuse

Harvesting Activities Human Environment (VSECs)

Archaeology

Archaeological Resources

Cumulative effects assessment

• Potential for other projects to use infrastructure

– Analysis

• 1 in 1000 exploration projects result in a mine

• 2% chance that the construction of a road will spawn the development of a mine in the north within a 300 km radius

– Result

• maximum 5% chance that a mine will result because of Zinifex infrastructure i.e., 1 or 2 mines

Cumulative effects assessment

• Results– no significant adverse cumulative effects

identified

– identified cumulative effects can be managed through project-specific mitigation and adjusted through monitoring