Open Pit Mining Expansion/Development Projects – Water Management and Infrastructure Planning

Project Highlights

KWL has supported several mine expansions for large-scale mining operations by developing a comprehensive water management strategy to address evolving site conditions and regulatory requirements. KWL’s work focuses on integrating new infrastructure with existing systems to safely manage contact and non-contact water across the site. This includes planning new infrastructure, improving existing infrastructure, and developing peak flow hydrology to support project scoping and feasibility studies. KWL works collaboratively with the clients and their environmental assessment teams.

Challenges

Mine site expansions require balancing operational needs with stringent environmental performance objectives. Key challenges included managing increased runoff from expanded disturbed areas, maintaining water quality compliance, and ensuring system resilience under extreme flow conditions. Integration with existing infrastructure added complexity to both design and implementation.

Approach

KWL supports with detailed hydrologic and hydraulic analyses to quantify flow conditions under a range of scenarios, including extreme events. Water balance modelling was used to assess system performance and inform infrastructure sizing. The team worked closely with stakeholders to align design solutions with operational constraints and long-term site planning.

Solution

A suite of water management measures was developed, including diversion systems, conveyance infrastructure, and storage facilities to effectively separate and control water across the site. Designs emphasized adaptability, allowing the system to evolve with future phases of expansion while maintaining compliance with regulatory requirements.

Outcome

The resulting water management framework provides a robust and flexible system that supports ongoing operations and future growth. The approach improves control of site water, reduces environmental risk, and ensures reliable performance during high-flow events, contributing to sustainable and responsible mine development.