Ontario’s Mining Act governs how mineral rights are administered, mining claims are registered, exploration work is authorized, and mining lands are rehabilitated. For mining companies and project developers, complying with the Act is not simply a matter of obtaining one permit; a project may involve several requirements under the Act’s regulations, other legislation, and consultation processes.
Although the Ministry of Energy and Mines administers Ontario’s mining-land system, the legal and regulatory requirements that apply will depend on the land, the proposed activity, the project stage, and the rights that may be affected.
What Is The Purpose Of The Ontario Mining Act?
The Mining Act is intended to encourage prospecting, mining-claim registration, and mineral exploration while protecting Ontario’s economy, recognizing existing Aboriginal and treaty rights (including the duty to consult), and minimizing effects on public health, safety, and the environment.
This means the Act serves more than one objective. It supports mineral development, including projects connected to Ontario’s critical-minerals strategy, but also establishes rules for land tenure, exploration, consultation, environmental protection, mine closure, and rehabilitation.
Key Provisions You Need To Know
Prospecting & Staking Claims
Ontario no longer relies primarily on physically staking mining claims on the ground. Mining claims are now registered electronically through the Mining Lands Administration System (MLAS).
MLAS is Ontario’s online platform for administering public mining lands, registering claims, viewing active unpatented claims, managing existing claims, and obtaining or renewing a prospector’s licence. A person registering a claim generally needs an MLAS account and a valid prospector’s licence.
Before registering a claim, proponents should confirm through MLAS that the mining rights are open for registration and review any withdrawals, existing tenure, or other restrictions affecting the lands. Broader issues such as surface rights, Indigenous rights, environmental requirements, and access may require additional consideration as the project moves toward exploration and development.
Exploration Permits & Plans
Ontario’s regulations distinguish between exploration activities that require an exploration plan and those that require an exploration permit, with permits generally required for activities that have the potential for greater environmental impact. Depending on the proposed work, proponents may also need to meet requirements related to mapping, notice, consultation, supervision, rehabilitation, and reporting.
An exploration plan or permit does not replace approvals required under other laws. Depending on the work, additional authorizations may be needed for roads, water crossings, land use, fish habitat, or the storage and use of explosives.
Assessment Work Requirements
Registering a mining claim is only the beginning. Claim holders must meet annual assessment-work requirements to keep claims in good standing.
Eligible work and expenses, reporting rules, assessment credits, deadlines, payments in place of work, and the distribution of credits are governed by the Mining Act Ontario Regulation 65/18.
Because missed deadlines or deficient reports may affect a claim, companies should build assessment-work obligations into their exploration schedules, budgets, and internal compliance systems.
Recent Amendments To The Mining Act
Ontario has continued to modernize its mining framework as it seeks to support mineral development and critical-minerals projects.
The Building More Mines Act, 2023 amended parts of the Mining Act dealing with decision-making authority, mineral recovery, closure planning, and mine-site rehabilitation. Related regulatory changes took effect in stages, including a new rehabilitation regulation that came into force on April 1, 2024.
Although the changes were intended to reduce certain administrative burdens and create regulatory efficiencies, they did not remove the need for careful compliance. Proponents must confirm which provisions are in force and how current requirements apply to their specific project.
Indigenous Consultation And The Mining Act
The Crown has the legal duty to consult Indigenous communities when contemplated Crown conduct may adversely affect established or credibly asserted Aboriginal or treaty rights.
Ontario’s Mining Act framework incorporates consultation at different stages of mineral exploration and mine development. The Ministry may delegate procedural aspects of consultation to a proponent, but the Crown remains responsible for ensuring that its duty is fulfilled.
For proponents, meaningful engagement should not be treated as a last-minute permitting task. Early planning, accurate project information, documented communication, and a willingness to understand community concerns may help identify issues before they affect project schedules or regulatory decisions.
How Licata Law Office Can Help
Mining projects may involve corporate structuring, financing, mineral tenure, exploration agreements, regulatory approvals, commercial contracts, and coordination across jurisdictions.
A mining finance lawyer at our firm can help a company identify the Ontario legal requirements relevant to its project, review agreements and proposed transactions, and determine when additional regulatory or jurisdiction-specific advice may be required.
Contact Licata Law Professional Corporation to learn how our firm can help you understand the Mining Act of Ontario, and how understanding the Act can help your mining projects progress.
FAQ
Can I mine on private property in Ontario?
Not necessarily. Surface ownership and mining rights can be held separately. Owning private property does not automatically mean that the owner controls the minerals beneath it, and holding mining rights does not necessarily give a person unrestricted access to or use of the surface.
The title, mining-rights status, applicable legislation, required notices, permissions, compensation rules, and regulatory approvals should be reviewed before exploration or extraction begins.
What is MLAS?
MLAS is Ontario’s Mining Lands Administration System. It is the province’s online platform for registering and managing mining claims, viewing mining-land information, handling certain claim transactions, and applying for or renewing a prospector’s licence.
This article provides general information about Ontario law and is not legal advice. Mining requirements can change and may depend on the land, activities, project stage, and affected rights.