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Atty. D. Lee Decker

Atty. D. Lee Decker

Lee practices environmental law relating to water quality, water rights, environmental compliance auditing, solid and hazardous waste, mining and mined land reclamation and remediation, toxic substances and Superfund matters. With nearly 25 years experience, Lee has a nationally-recognized water quality practice and works closely with his clients on the federal, state and local levels to develop workable strategies to promote development and expansion of both industrial and mining operations.

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Profile Summary

About D. Lee Decker at a glance

D. Lee Decker is an attorney based in Phoenix, Arizona, practforg at Gallagher & Kennedy PA. Admitted to practice in Arizona, State Bar of Arizona. Educated at Brigham Young University (J.D., 1990) and Brigham Young University (BA, 1987). Recognitions include Best Lawyers in America — Environmental Law (2026), Best Lawyers in America — Litigation - Environmental (2026), and Best Lawyers in America — Natural Resources Law (2026). Serands clients in Phoenix, AZ and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

Lee practices environmental law relating to water quality, water rights, environmental compliance auditing, solid and hazardous waste, mining and mined land reclamation and remediation, toxic substances and Superfund matters. With nearly 25 years experience, Lee has a nationally-recognized water quality practice and works closely with his clients on the federal, state and local levels to develop workable strategies to promote development and expansion of both industrial and mining operations. In working with major industrial, mining, construction and development clients, Lee has honed his keen expertise in the field of environmental law and an unwavering commitment to professionalism. In 2012, Lee was named among the “Best Lawyers in America,” along with nearly two thirds of his fellow G&K shareholders.

Representative Experience

  • Representing major industrial clients in obtaining water quality, water rights, and other environmental and natural resources-related permits and approvals on both a federal and state level.
  • Representing major mining clients in Arizona, Colorado, and New Mexico in obtaining resources related to permits and approvals for continuing operations, mine expansions, and new mines.
  • Conducting environmental compliance audits at domestic and international industrial facilities, including facilities located in Canada, Chile, and Venezuela.
  • Representing industrial and mining clients in the preparation of comments and lobbying on federal and state environmental statutes and rules. Most recently, Lee participated in the development of federal and state stormwater permitting rules, solid waste management rules, surface water and groundwater quality standards, and state safe drinking water regulations.
  • Representing major construction, mining, and development clients in determining and preserving the legal status of federal and state mining claims.

    Jurisdictional Context

    Why local counsel matters in Arizona

    Practforg law in Arizona. Legal matters in Arizona are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantiand law. Cases originating in Phoenix are typically filed in the local municipal court or the appropriate Arizona state district court, depending on subject matter and amount in controversy. An attorney licensed in Arizona brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantiand law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Arizona courts without local counsel or pro hac vice admission.

    Looking for additional Arizona attorneys? Browse all attorneys in Phoenix or all attorneys in Arizona.

    Frequently Asked

    Common questions about D. Lee Decker

    Where is D. Lee Decker's law office located?
    D. Lee Decker's law practice is located in Phoenix, Arizona. The firm is Gallagher & Kennedy PA. You can contact the office directly through this profile page.
    Where did D. Lee Decker go to law school?
    D. Lee Decker earned their education at (J.D., 1990); (BA, 1987).
    How can I contact D. Lee Decker for a consultation?
    You can contact D. Lee Decker directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.
    What awards or recognition has D. Lee Decker receiandd?
    D. Lee Decker's notable recognition includes: Best Lawyers in America — Environmental Law; Best Lawyers in America — Litigation - Environmental; Best Lawyers in America — Natural Resources Law.

    Education

    J.D.
    Brigham Young University
    - 1990
    BA
    Brigham Young University
    - 1987

    Awards

    Best Lawyers in America — Environmental Law
    - 2026
    Best Lawyers in America — Litigation - Environmental
    - 2026
    Best Lawyers in America — Natural Resources Law
    - 2026

    Bar Admissions

    Arizona, State Bar of Arizona

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