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Tim Duncheon

Associate

San Francisco +1 415 591 6030

  • About
  • Representative Matters
  • Credentials
  • About

    Tim Duncheon is an associate in the firm’s San Francisco office and a member of the Environmental and Energy Practice Group. He represents clients in litigation, regulatory, and policy matters involving a wide array of issues, including greenhouse gas regulation, California's climate laws, Clean Air Act enforcement, corporate claims about climate action, and environmental review. Tim also helps manage the firm's Inside Energy & Environment blog.

    Tim also has an active pro bono practice. He focuses on addressing legal barriers that prevent building the homes and clean energy infrastructure needed to solve the housing and climate crises.

    Prior to joining Covington, Tim clerked for the Honorable William A. Fletcher of the United States Court of Appeals for the Ninth Circuit and the Honorable Charles R. Breyer of the United States District Court for the Northern District of California.

    Areas of Expertise

  • Practices and Industries
  • Representative Matters
    • Representing coalition of advanced energy interests and power companies as respondent-intervenors in support of EPA in litigation challenging EPA’s revised GHG standards for light-duty vehicles for model years 2023-2026, Texas v. EPA, No. 22-1031 (D.C. Cir.) and EPA’s reinstatement of a waiver of federal preemption allowing California to enforce its own greenhouse gas and zero emission vehicle standards for light-duty vehicles, Ohio v. EPA, No. 22-1081 (D.C. Cir.).
    • Representing coalition of power companies in submitting comments in support of EPA's implementing regulations under Section 111(d) of the Clean Air Act to reduce carbon dioxide emissions from the power sector.
    • Advising major refiner on regulatory issues implicated by a county’s certification of an environmental impact report under the California Environmental Quality Act (CEQA) to convert a petroleum refinery to production of renewable diesel from feedstocks.
    • Assisting environmental non-profit organization in understanding the legal rules relating to internationally transferred mitigation outcomes under Article 6 of the Paris Agreement.

    Areas of Expertise

  • Credentials
    Education
    • New York University School of Law, J.D., 2020
        • summa cum laude
        • Order of the Coif
        • University Graduation Prize
        • Benjamin F. Butler Memorial Award
        • New York University Law Review, Notes Editor
        • Administrative Law Prize
        • Law and Economics Prize
        • Weinfeld Prize for Scholarship in Procedure and Courts
        • Paul D. Kaufman Memorial Award for most outstanding note
    • Yale University, B.A., 2010
        • cum laude
        • Distinction in History
    Bar Admissions
    • California
    • U.S. Court of Appeals for the Tenth Circuit
    • U.S. District Court, Northern District of California
    • U.S. Court of Appeals for the District of Columbia Circuit
    • U.S. Court of Appeals for the Ninth Circuit
    Judicial Clerkship
    • Hon. Charles R. Breyer, U.S. District Court, Northern District of California, 2021 - 2022
    • Hon. William A. Fletcher, U.S. Court of Appeals, Ninth Circuit, 2020 - 2021
    Pro Bono
    • Wrote and submitted an amicus curiae brief to the United States Supreme Court on behalf of California pro-housing ("YIMBY") nonprofit organizations arguing that unconstitutionally high monetary exactions by local governments worsen the housing crisis.
    • Advising an environmental nonprofit organization on potential legal challenges to local ordinances that restrict the development of solar energy projects.
    • Representing a noncitizen in an immigration petition to the Ninth Circuit.
    • Representing a federal inmate convicted of marijuana-related crimes in drafting and submitting a clemency petition to the President.
    Previous Experience
    • New York City Law Department, Affirmative Litigation, Honors Intern (2018)
    • Playwright (2011-2017)

    Areas of Expertise

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