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Dufferin Harper

Dufferin Harper
Dufferin Harper Partner | Calgary
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Representative regulatory matters including acting as counsel for:

  • Lead environmental regulatory counsel in applications to the National Energy Board for approval of a 4,500 km pipeline to transport crude oil from Alberta to Quebec and New Brunswick, and related gas transmission facilities

  • E.ON Canada in a 120 MW wind power project hearing before the Alberta Utilities Commission

  • Grand Rapids in a pipeline hearing before the Alberta Energy Regulator

  • Area residents at the CEAA Panel Review of Sydney Tar Ponds and Coke Oven Sites in Nova Scotia

  • AC LNG in its Export and Import Licence for natural gas issued by the NEB

Representative corporate/commercial matters include acting as environmental counsel:

  • In complicated transactions involving the allocation of environmental risk and bespoke remediation agreements in numerous jurisdictions throughout North America

  • In the purchase and sale of greenhouse gas credits and environmental attributes

  • In environmental due diligence reviews associated with potential purchase, sales, initial public offerings, mergers and acquisitions of various companies, including those operating in the oil sands

  • In environmental audits of various companies (including mining and aeronautical) and Canadian government operations

  • For financial institutions and developers in the financing and development of various waste-energy power-generation facilities and renewable energy projects

  • In transportation of dangerous goods matters

Representative litigation and quasi-criminal matters include acting as counsel for:

  • Companies complying with ongoing regulatory requirements, including responding to contaminant releases and historic contamination, and liaising with applicable regulators

  • Companies charged with violations of various environmentally related statutes

  • Plaintiffs and defendants in contaminated sites lawsuits and actions

  • Companies responding to environmental protection orders and judicial reviews of decisions rendered by government Ministers

Awards & Recognition

Duff has been recognized as a leading environmental law practitioner in the following publications:

  • The Best Lawyers in Canada 2022 (Administrative and Public Law, and Environmental Law)

  • The Legal 500 Canada 2022 (Environmental)

  • Chambers Global: The World's Leading Lawyers for Business 2022 (Environmental)

  • The Canadian Legal Lexpert Directory 2022 (Environmental Law and Energy)

  • Who's Who Legal: Global 2021 (Environment – Climate Change and Environment)

  • Who's Who Legal: Canada 2021 (Environment and Climate Change)

  • Thomson Reuters Stand-out Lawyer 2021 – Independently Rated Lawyers (As nominated by senior in-house counsel)

  • Chambers Canada: Canada’s Leading Lawyers for Business 2021 – (Band 3 – Environment)

  • PLC Which Lawyer?

Professional Activities

Duff is a member of both The Law Society of Alberta and the Nova Scotia Barristers' Society. He is also a past chair of the National Environmental Law Section of the Canadian Bar Association.

From 1999 to 2006, Duff taught a course on business and environmental law at Dalhousie Law School.

Admitted to the Alberta Bar – 2007
Admitted to the Nova Scotia Bar – 1992
LLB, University of New Brunswick – 1991
MSc (Biology), Dalhousie University – 1986
BSc (Hon., Marine Biology), Dalhousie University – 1983
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