Lloyd W. Landreth

Lloyd W. Landreth

Lloyd Landreth is of counsel in the Tulsa office of GableGotwals. With a pre-law educational and work history in the natural resource and environmental science fields, Lloyd Landreth has practiced exclusively in the environmental regulatory and litigation area since 1986. His clients include oil and gas exploration, production and transportation companies (including petrochemical subsidiaries), waste disposal companies, domestic and international airlines, airline fuel consortiums, electric and gas utilities, Indian tribes and a variety of industrial clients.

Lloyd has extensive experience with environmental actions brought nationwide under federal statutory schemes such as CERCLA, RCRA, NEPA, CAA, CWA and state equivalents thereto, as well as common law claims. He has been involved in defending clients against regulatory agency and private party claims for cost recovery and in pursuing cost recovery actions on behalf of clients against private parties and government agencies related to alleged soil, surface water and groundwater pollution. Lloyd has participated in administrative litigation and negotiations involving air, water waste, pipeline/PHMSA compliance and application of NEPA and NPDES permitting to various projects. He has worked extensively with environmental consulting firms on the technical and legal aspects of environmental claims associated with a variety of affected media (air, soils, sediments, surface and groundwater) including alternatives associated with risk-based cleanup requirements. He has worked on a variety of environmental matters for Indian tribes and has been involved in numerous water right transactions. Lloyd also has extensive experience in negotiating cleanup actions with federal, state and local regulatory agencies and appears in both federal and state courts of various jurisdictions on environmental litigation matters.

Lloyd’s recent experience includes:

  • Defense and prosecution of claims in district court related to historic and current saltwater and petroleum hydrocarbon pollution at exploration and production facilities on behalf of oil and gas producers.
  • Representation of energy producers in negotiations with state and federal regulatory agencies, including public utility authorities, regarding enforcement actions, consent orders and other matters related to soil, water and air pollution issues.
  • Prosecution of CERCLA cost-recovery claims against private parties for chlorinated solvent impacts.
  • Counseling and administrative litigation regarding PHMSA compliance.
  • Negotiations regarding CAA enforcement and permitting, including violation of emission standards, claims regarding emission control equipment, failure to permit, failure to amend and audit privilege issues.
  • Representation of energy producers and the airline industry on a variety of NEPA issues.
  • Representation of major oil producers on several former refinery and petrochemical sites to implement corrective measures under RCRA and state hazardous waste laws, pursue private parties for cost recovery and defend private party claims.
  • Defense of federal and state claims for natural resource damages on mining, landfill, oil and gas exploration and production and estuary sites.
  • Negotiation and development of environmental agreements with private parties, state and municipal authorities and management of risk-based cleanup activities associated with upgrade and expansion of jet fueling systems at airports.
  • Drafting and negotiations on a variety of contracts, leases and merger and acquisition agreements related to environmental due diligence and environmental liabilities.
  • Representation of National Trade Association regarding expansion of state regulatory agency jurisdiction over clean water act claims.
  • Negotiations regarding wetland disturbance and wetland taking and mitigation issues.
  • Defense of EPA claims regarding FRP, SPCC, SWPPP and related CWA violations.
  • Representation of property owners and prospective purchasers regarding Brownfield and Voluntary Cleanup Program issues.
  • Participation in energy producer facility environmental audits.
  • Evaluation of environmental insurance coverage issues and negotiations with brokers and insurance carriers on environmental coverage terms. Representation of clients for recovery of cleanup costs from historic CGL insurance carriers.
  • Defense of federal citizen suit environmental claims against airlines and oil companies associated with terminal, hydrant, refining and pipeline facilities.
  • Defense and enforcement of contractual indemnification obligations associated with environmental claims at a variety of industrial and commercial facilities.
  • Transactions on behalf of developers for securing groundwater and surface water rights and valuation of water rights.
  • Representation of Indian tribes on natural resource damage actions in Oklahoma and Washington.


Environmental Law


J.D., University of Colorado School of Law (1986)

B.S., Fisheries Biology/Wildlife Ecology, Oklahoma State University (1981)


Martindale-Hubbell Lawyer Ratings

Best Lawyers
Lawyer of the Year – Tulsa
Environmental – 2017, 2019
Natural Resources Law – 2020

Best Lawyers
Litigation – Environmental
Natural Resources Law

Super Lawyers

2014 OBA Leadership Class

Environment Ranked Individual


Oklahoma Bar Association
Colorado Bar Association
American Bar Association
Fellow – American College of Environmental Lawyers