Picture of Charles S. McCowan III

Charles S. McCowan, III

Partner

"Because of my longevity of practice, I have been involved in historic and precedent-setting energy industry cases across Louisiana. I bring the requisite know-how, perspective, depth of understanding in environmental science, legal prowess, and advocacy skills needed to defend these claims."

Trey McCowan defends the rights of local, regional, and multi-national energy and petrochemical clients across a wide variety of state and federal court litigation matters. He brings a deep bench of proven experience to resolving the complex commercial disputes and high-stakes litigation claims that permeate the energy industry. He also defends difficult oil and gas environmental disputes, toxic tort claims, and product liability and general commercial litigation.

In and out of state and federal court and across the region, Trey defends protracted legacy oil field site cases valued into the billions of dollars in dispute. These claims involve soil and groundwater contamination and claimed contaminants, including Non-Hazardous Oilfield Wastes and NORM and inland locations and locations in marsh/wetland environments brought on behalf of individuals and groups of landowners numbering in the hundreds. Many of these cases are class actions involving thousands of potential class members and sites ranging from one-acre tracts to 158 square miles. He also defends environmental litigation involving claims of soil and groundwater contamination involving some of the oldest oil and gas fields in Louisiana.

In addition, Trey is skilled in defending energy companies against wetlands loss disputes across Louisiana's coastal parishes.

An active and highly effective trial advocate, among Trey’s accomplishments are a litany of published cases, including myriad precedent-setting results that have shaped case law for the energy industry across the region. Trey is that litigation and trial counselor who is courtroom-tested, having tried significant and challenging cases in federal and state courts and before arbitration tribunals and administrative bodies. He strongly believes in obtaining the very best result for firm clients, being cost-conscious with their resources, and developing an overarching litigation strategy that incorporates a compelling narrative to promote an advantageous settlement or the win.

In addition to his law degree, Trey holds an M.A. in Environmental Sciences (Environmental Planning and Management) – a real value when resolving these highly specialized science-driven disputes. Trey is known for his ability to understand the depth of scientific complexity inherent in these claims, as well as for his ability to communicate sophisticated technical concepts in plain speak to judges, juries, and opposing counsel alike.

Representative Experience
  • Representation of major international oil companies in a wide range of legacy oil field site cases: The cases have involved claims associated with soil and groundwater contamination. The claimed contaminants included Non-Hazardous Oilfield Wastes ("NOW") as well as NORM. The cases include inland locations as well as locations in marsh/wetland environments. The cases have been brought on behalf of individual landowners and landowners numbering in the hundreds. Many cases were filed as class actions involving thousands of potential class members. The sites range from one-acre tracts to 158 square miles
  • Representation of major energy companies in wetlands loss issues in Louisiana's coastal parishes
  • Representation of a major international oil company in Louisiana, an environmental litigation matter involving claims of soil and groundwater contamination in the oldest oil and gas field in Louisiana
  • Representation of a major international oil company in over fifty environmental litigation matters involving oil fields throughout the state of Louisiana
Education
  • Tulane Law School, J.D., cum laude, 1989
  • LSU, M.A., 2010
  • LSU, B.A., 1986
Admissions
  • Louisiana
Memberships
  • Member, Baton Rouge Bar Association
  • Member, Louisiana State Bar Association
  • Member, American Bar Association
  • Member, Defense Research Institute
  • Member, Dean Henry George McMahon American Inn of Court
Recognition
  • AV Preeminent-rated, Martindale-Hubbell
  • "Best Lawyers," The Best Lawyers in America, 2005-2025
  • "Super Lawyers," Louisiana Super Lawyers, 2008-2019
  • "Lawyer of the Year," Louisiana Super Lawyers, 2013
  • "Sustainable Environment Award," LSU School of Coast and Environment, Department of Environmental Sciences, 2009-2010
  • "Forty Under 40," Baton Rouge Business Report, 2000
Articles, Publications and Presentations
  • "U.S. Fifth Circuit Upholds Dismissal of Flood Protection Authority Case Against Oil and Gas Industry Members," Louisiana Law Blog, March 3, 2017
  • "Fundamental Fairness," Louisiana Super Lawyers Magazine, 2013
  • "A Discussion of Selected Problems Presented by Class Action Mass Tort Litigation - A Defense Perspective," Conference for Trial Lawyers and Judges, Northwestern School of Law, Lewis & Clark College, 1995
  • "A Case for an Independent Administrative Judiciary for Louisiana," Louisiana Association of Administrative Law Judges Annual Meeting, 1994
  • "Louisiana Judicial and Legislative Highlights and Hypothetical Problems," Institute of Property Taxation, 1989
Community Service
  • Chairman, Advisory Council, LSU College of Coast and Environment
  • Graduate, Non-Profit Board of Directors Training School, Volunteer Baton Rouge
  • Board of Directors, Greater Baton Rouge Food Bank (Community Advisory and Nominating Committee Committees)
  • Member, American Red Cross (Disaster Action Team)
  • Member, Board of Directors, Committee, Legal Counsel Scout Show Committee and Judge, Eagle Scout Sponsor, SME Fundraiser, Cub master, Pack 50, Istrouma Area Council, Boy Scouts of America
  • Member, 7:30 Club, Greater Baton Rouge Chamber of Commerce
  • Member, Agency Services Board, Community Partnership Duration, Capital Area United Way
  • Leadership Giver, United Way Gottlieb Association
  • Fundraiser, Catholic High School
  • Member, City Club of Baton Rouge
  • Board Member, Kappa Alpha Order, Alpha Gamma Chapter Alumni Association, LSU
  • Member, Baton Rouge Rotary Club
  • Board Member, You Who, Inc., Louisiana Non-Profit Corporation
Reported Cases
  • Transcontinental Gas Pipe Line Corporation v. 118 Acres of Land, 745 F. Supp. 366, 116 P.U.R. 4th 350 (E.D.La. 1990)
  • Transcontinental Gas Pipe Line Corporation v. Transportation Insurance Company, 958 F. ed 622 (5th Circuit 1992)
  • Vulcan Materials Company v. River City Towing, Inc. (M.D.La. 1992)
  • Ecosystems Management Inc. v. Vulcan Materials Co., (M.D.La. 1992)
  • Cockerham v. Triad Chemical Company, No. 92-944 (M.D.La. 1993)
  • Sheppard v. Citgo, et. al., No. 93-0270 (M.D.La. 1994)
  • Texaco Inc. v. Sanders, et. al., 182 B.R. 937 (Bkrtcy. S.D.N.Y. 1995)
  • Sanders v. Gary, et. al., 657 So. 2d 1085 (La. App. 1st Circuit 1995)
  • Kelly v. Star Enterprises, 44 F. 3rd 531 (5th Circuit 1995) (Table)
  • Resolution Trust Corporation v. American Title Insurance Company, 901 F. Supp. 122 (M.D.La 1995)
  • In re Texaco, 182 B.R. 937 (S.D.N.Y. Bankruptcy 1995)
  • Geraldine Ard, et. al. v. Transcontinental Gas Pipe Line Corporation, 138 F. 3rd 596 (5th Circuit 1998)
  • Texaco Inc. v. John M. Duhe, 44 F. Supp. 2d 809 (W.D.La. 1998)
  • United Houma Nation v. Texaco Inc., No. 97-4006, (E.D.La. 1998)
  • Wilson v. Palmer Production, et. al., 706 So. 2d 142 (La App. 1st Circuit 1998)
  • Ard v. Transcontinental Gas Pipe Line Corp., 138 F. 3d 596 (5th Circuit 1998)
  • Hargis v. Jefferson Parish, et. al., 748 So. 2d 606 (La. App. 4th Circuit 1999)
  • Orange Grover Properties LLC v. Allured, 885 So. 2d 1170 (La. App. 1st Circuit 2004)
  • State ex rel Williams v. State of Louisiana, 888 So. 2d. 792 (La. 2004)
  • Gunderson v. F.A. Richard & Associates, Inc. 937 So. 2d 927 (La. App. 3rd Circuit 2006)
  • Barasich v. Columbia Gulf Transmission Co., 467 F. Supp. 2d 676 (E.D. La. 2006)
  • Louisiana v. Union Oil Co. of California, 458 F. 3d 364 (5th Circuit 2006)
  • Alford v. Chevron USA Inc., 13 F. Supp. 3d 581 (E.D. La. 2014)
  • Board of Commissioners of Southeast Louisiana Flood Protection Authority – East v. Tennessee Gas Pipeline Company LLC, 850 F. 3d 714 (5th Circuit 2017)
  • Parish of Cameron v. Auster Oil & Gas Inc., 420 F. Supp. 3d 532 (W.D. La. 2019)
  • Lexington Land Development LLC v. Chevron Pipeline Company, 327 So. 3d 8 (La. App. 1st Circuit 2021)
  • Jeanerette Lumber & Shingle Company v. Florida Gas Transmission Co., 325 So. 3d 407 (La. App. 3rd Circuit 2021)
  • State ex rel Tureau v. BEPCO LP, 330 So. 3d 1107 (La. App. 1st Circuit 2021)
  • Andrepont v. Chevron USA Inc., 335 So. 3d 916 (La. App. 3rd Circuit 2022)
  • Universal Services and Associates LLC v. Grundmeyer, 354 So. 3d 255 (La. App. 4th Circuit 2022)
  • Dietz v. Superior Oil Company, 129 So. 3d 836 (La. App. 3rd Circuit 2024)
  • City of New Orleans v. Apache Louisiana Minerals LLC, _F. 4th___(5th Circuit 2025)
Super Lawyers
Charles McCowan Super Lawyers
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