Aspen supported the Gaskell West Solar Project by providing compliance inspection services for biological, cultural, and paleontological resources.

Aspen prepared an EIR on behalf of San Luis Obispo County for the CVSR proposed by SunPower Corporation. SunPower proposed to con­struct and operate a controversial 250 MW solar photovoltaic power plant on approxi­mately 4,000 acres of rangeland in the Carrizo Plain, an unincorpo­rated portion of eastern San Luis Obispo County.

The Oberon Renewable Energy Project is a 500-megawatt solar photovoltaic facility with integrated energy storage and a generation-tie line that connects into the statewide power grid.

Aspen Environmental Group is assisting the California State Lands Commission on behalf of Aurora Solar, LLC, a wholly owned subsidiary of Avangrid Renewables, with the environmental permitting and the CEQA documentation for a proposed 200 megawatt (MW) solar photovoltaic facility with up to 200 MW of integrated energy storage on approximately 3,570 acres of land managed by the CSLC, in San Bernardino County, CA.

Aspen managed the preparation of an Environmental Impact Report (EIR) for the Topaz Solar Farm proposed by Topaz Solar Farms LLC, a wholly owned subsidiary of First Solar, Inc.

The Desert Harvest Solar Project is a solar photovoltaic facility that will generate 150 megawatts of electricity on an approximately 1,200-acre site characterized by undeveloped, non-agricultural land managed by the California Desert District of the U.S. Bureau of Land Management (BLM).