Quantified direct and indirect greenhouse gas emissions from construction, maintenance, and operations at the Salton Sea and evaluated impact significance in accordance with state guidance. Six project alternatives were evaluated, each requiring a 2-year construction period, in addition to ongoing operations and maintenance. Construction and maintenance emissions estimates included diesel- powered earthmoving equipment, portable pumps and generators, and on-road vehicles such as heavy-duty trucks. Indirect GHG emissions from permanent electrically powered water pumps were also quantified. Cardno prepared a detailed power mix analysis to determine expected GHG content of electric power purchased from the local irrigation district. Dr. Wolf coordinated with project management staff as part of building Cardno’s Global ESG, Climate and Sustainability business line.