This project completed a plan consolidation effort that began in 2016 for the California Desert Conservation Area (CDCA) Plan. The consolidation included all amendments to the CDCA Plan of 1980 as Amended (sans project-specific amendments) through the Haiwee Geothermal Leasing Area amendment of 2020.

Aspen prepared an Environmental Impact Report and Environmental Impact Statement (EIR/EIS) on behalf of the California Public Utilities Commission (CPUC) and the Bureau of Land Management (BLM) for the SCE West of Devers (WOD) Upgrade Project.

Aspen conducted the permitting for the 30-MW wind repower project on BLM land in the San Gorgonio Pass Wind Resource Area of Riverside County, including USFWS Biological Opinion, CDFW Incidental Take Permit (ITP) and Streambed Alteration Agreement, RWQCB Waste Discharge Requirements, and Army Corps determination of no jurisdiction.

The Devers–Palo Verde No. 2 Transmission Line Project is a 230-mile, 500-kilivolt (kV) electric transmission line routed between Devers Substation in California and Harquahala Generating Substation in Arizona, as well as 41.6 miles of new 500-kV transmission line routed between the Devers Substation and the Valley Substation in the Romoland area of Riverside County.

The Thousand Palms Flood Control Project consists of a series of levees and channels to convey flood waters away from developed areas, thereby providing flood hazard protection to the community of Thousand Palms.

The existing Mesa Wind Project is located entirely on approximately 450 acres of lands administered by the Bureau of Land Management (BLM) in Riverside County. The project is located about 11 miles northwest of the City of Palm Springs, north of Interstate 10 and just west of the Whitewater River.

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.

The Desert Renewable Energy Conservation Plan (DRECP) created a Land Use Plan Amendment to the California Desert Conservation Area (CDCA) Plan.

Aspen has provided a variety of environmental services to the USACE for the Santa Ana River Mainstem Project. The Santa Ana River Mainstem Project is a major flood control project spanning 75 miles along the Santa Ana River – from the upper canyon in the San Bernardino Mountains downstream to the Pacific Ocean at Newport Beach.

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).