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Leslie Boyle


555 17th Street, Suite 3200, Denver, CO 80202

Leslie provides strategic advice to developers of large infrastructure projects, with a focus on renewable power generation projects, energy storage projects, and oil and gas upstream and midstream facilities.

Leslie negotiates the contracts required for every stage of a project’s life cycle, from development and construction through revenue generation and day-to-day operation. Her experience covers a wide range of complex development and commercial contracts, including engineering, procurement, and construction agreements, power purchase agreements, operation and maintenance agreements, oil and gas gathering and transportation agreements, and master services agreements. She also advises clients in the negotiation of joint ventures for the development and operation of infrastructure projects.

Her clients range from independent power producers, utilities, and national upstream and midstream oil and gas companies, to equipment manufacturers and professional service providers.

Leslie teaches biannual seminars through EUCI on renewable energy power purchase agreements and regularly teaches internal seminars on the drafting and negotiation of contracts.


Power Industry Transactions
  • Utility, Corporate, and Pre-Paid Power Purchase Agreements
  • Balance of Plant Contracts
  • Construction Services Agreements
  • Development Services Agreements
  • Engineering, Procurement and Construction Agreements
  • Equipment Supply Agreements
  • Interconnection and Transmission Agreements
  • Management Services Agreements
  • Operation and Maintenance Agreements
  • Shared Facilities Agreements
  • Warranty Agreements
  • Joint Venture Agreements
Oil & Gas Industry Transactions
  • Gathering, Processing and Transportation Agreements
  • Terminal Services and Storage Agreements
  • Connection Agreements
  • Construction Services Agreements
  • Engineering, Procurement and Construction Agreements
  • Professional Service Agreements
  • Purchase and Sale Agreements
  • Joint Venture Agreements

Client Results

Electric Power Generation Industry
  • Represented the Southern California Public Power Authority (SCPPA) in the negotiation and closing of a prepaid power purchase agreement, under which the buyer prepaid for 20 years of energy from a 262 MW wind energy project in Washington.

  • Represented SCPPA in the negotiation of a Power Purchase Agreement for the purchase of energy and capacity from the Camino Project, a combination 44 MW solar photovoltaic facility and 11 MW battery storage system.

  • Represented SCPPA in connection with its entry into a 20-year Power Purchase Agreement for the procurement of energy, capacity, and environmental attributes from three geothermal projects located in Inyo County, California, owned and operated by Coso Geothermal Power Holdings, LLC.

  • Represented SCPPA in connection with its entry into a 25-year power purchase agreement with respect to the 14.5 MW nominal nameplate capacity geothermal generating facility known as the Star Peak Geothermal Project, located in Pershing County, Nevada.

  • Represented SCPAA in connection with the purchase of energy, environmental attributes, and capacity rights from a 19.9 MW biomass power generating project location in Loyalton, California. 

  • Represented SCPPA in the acquisition of 53 MW of energy storage capacity, the first deal of its kind at the utility scale.

  • Represented SCPPA in the negotiation of firming and shaping synthetic transmission arrangements for energy projects located in Washington and Oregon.

  • Represented SCPPA in connection with the purchase of energy, environmental attributes, and capacity rights from a 70 MW portion of a 150 MW solar photovoltaic project in Riverside County, California. 

  • Represented Cook Inlet Region, Inc., in connection with the development and financing of the 17.6 first phase of the Fire Island Wind project, the first utility-scale wind generation project in Alaska, and a submarine and overland transmission line connecting the Fire Island Project to mainland Anchorage Alaska, including the negotiation of the power purchase agreement and financing documents.

  • Represented Agrilectric Power Partners in connection with the negotiation of a dispatchable power purchase agreement with Energy Services, Inc. for the sale of the output from a biomass facility (rice hull-fired) located in Louisiana.

  • Represented a large equipment manufacturer in the negotiation of the lease of natural gas-fired generators to an oil and gas producer, along with the related engineering, procurement, and construction agreement for the facility and maintenance services agreement for the generators.
  • Represented an advisor to an international energy storage company in the drafting of an EPC contract and O&M agreement for the installation and operation of battery energy storage systems.

Oil and Gas Industry
  • Represented WPX Energy Inc. in the negotiation of gas gathering and processing, oil gathering, oil transportation, and connection agreements related to its midstream facilities in the Permian Basin.

  • Represented DCP Midstream, LP in the drafting and negotiation of infrastructure-related contracts in connection with the expansion of its gathering and processing facilities in Texas, Oklahoma, New Mexico, and Kansas, including the negotiation of engineering, procurement, and construction services agreements, procurement agreements for purchases of line pipe and other midstream-related materials, and electricity supply contracts for processing plants.

  • Represented Paradigm Energy Partners, LP in the negotiation of gathering and transportation agreements and various connection agreements for pipelines in the Bakken and the Eagle Ford Shale.

  • Represented Tallgrass Energy Partners, LP in connection with the negotiation of a produced water gathering agreement and freshwater distribution agreement for oil and gas properties in Weld County, Colorado.

  • Represented a national oil and gas company in the negotiation of multiple gas gathering agreements, oil gathering agreements, produced water gathering agreements, and freshwater transportation agreements servicing oil and gas properties in Weld County, Colorado.

  • Represented owner of LNG liquefaction plant in the negotiation of the engineering, procurement, and construction agreements for the tank and balance of plant.
  • Represented national oil and gas midstream company in connection with the negotiation of numerous retail power purchase agreements to serve its processing plants and other facilities.

  • Represented a petroleum refiner and distributor in the negotiation of numerous retail power purchase agreements to serve its refineries and other facilities.

  • Represented national petroleum products company in the sale of petroleum products to numerous customers.

Commercial Transactions
  • Represented a national manufacturer in the negotiation of numerous supply and distribution agreements for the sale of products to distributors and retailers.

  • Represented a ski apparel company in the negotiation of its warehouse and fulfillment services agreements.

  • Represented a railroad part manufacturer in the negotiation of various sales agreements to national railroad companies.

  • Represented a pharmaceutical company in the negotiation of its development services and commercial supply agreements with customers.



Speaking Engagements


Bar Admissions


  • The Best Lawyers in America©, Corporate Law, 2021
  • Colorado Super Lawyers® Rising Stars, Energy & Natural Resources, 2013-2021
  • Denver Business Journal, Who's Who in Energy, 2017

Professional and Civic Affiliations

  • American Bar Association, Member
  • Colorado Bar Association, Member
  • Denver Bar Association, Member
  • Impact100, Grant Committee Member
  • Big Brothers Big Sisters, Volunteer Big Sister
  • Meals on Wheels, Volunteer
  • Musana Community Development Organization, past Board Member and multiple Executive Officer roles 2010-2016

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