Somach Simmons and Dunn, Attorneys at Law Somach Simmons & Dunn | Attorneys at Law

Areas

Education

  • University of the Pacific, McGeorge School of Law (J.D., with distinction, 2019), Water and Environmental Concentration
  • University of California, Santa Cruz (B.A., 1999)

Selected Admissions

  • California
  • United States District Court for the Eastern District for California
  • United States Court of Appeals for the Ninth Circuit

Casey A. Shorrock
Shareholder
LinkedIn Bio

Casey Shorrock focuses her legal practice on environmental and land use law, specializing in CEQA, NEPA, natural resource management, and entitlements. Casey works seamlessly with both public and private entities to help projects progress responsibly and timely through permitting processes, meet the goals of involved parties, and assist clients if legal or other challenges arise. Her transition from a successful former career in environmental consulting and planning to the legal field uniquely positions her as a seasoned advisor for clients navigating complex environmental and regulatory challenges.

Drawing on her extensive background, Casey offers a holistic perspective, integrating legal strategies with practical insights from years of hands-on experience as an environmental consultant and planner. By leveraging her deep understanding of environmental regulations and ability to identify technical and legal nuances, she provides clients with tailored solutions that meet regulatory requirements and effectively address real-world environmental concerns. She handles litigation and pre-litigation matters involving environmental and land use law, with emphasis on CEQA, NEPA, natural resources, endangered species and wetlands, water resources, air quality, climate change, solid waste, wildfire prevention regulation, and state housing and development regulations, and local environmental and land use ordinances.

In her previous career, Casey worked with and for agencies at all levels of government, she managed the environmental review process for a variety of successful development and infrastructure projects and government actions, including preparation of state, federal, tribal, and joint environmental documents, focusing on approvals, permitting, and streamlining environmental regulatory compliance. Casey brings these same skills to her legal practice.

Casey attended McGeorge School of Law on a full merit scholarship as an Anthony M. Kennedy Fellow. During law school, she worked as a summer associate for Remy Moose Manley, LLP, and externed for Judge Kimberley J. Mueller at the U.S. District Court for the Eastern District of California. At McGeorge, she received the Stauffer Charitable Trust Research Fellow Award for her paper Environmentally Responsible and Streamlined Development in California: The Promise of CEQA’s Class 32 Exemption and Witkin Awards for academic excellence in Environmental Law and Oceans & Coastal Law. Prior to joining Somach Simmons & Dunn, Casey worked for Remy Moose Manley.

As a fifth generation Sacramentan from a large Irish-American family, Casey has deep roots in the community, which helps bring an important local perspective to all of her work. She also brings a broader perspective, stemming in part from her extensive national and international travels and time living and working abroad in China. Outside of work, Casey enjoys time with her family—gardening, skiing in Tahoe, managing two rambunctious pugs, going to music shows with her daughter, and visiting Disneyland as often as possible.

Representative Matters

Assist developer with environmental review and entitlements for a large mixed-use residential development (8,000+ units) in north Sacramento County, California.

Assist developer with environmental review and entitlements for a large sustainable mixed-use residential development (2,200 units) in Brisbane, California.

Assist developer/operator with environmental planning and review and entitlements for organic reuse and recycling facilities in Turlock, California, and throughout the state.

Represent preservation/agricultural group in federal and state litigation against multiple agencies for violations of federal regulations, NEPA, CEQA, and the Delta Reform Act for actions taken within the Yolo Bypass, Yolo County, California.

Assist telecommunication group with environmental review and entitlements for a 20+ mile fiber optic installation project in the Salton Sea area, California, funded by state and federal grants to provide internet access to unserved disadvantaged or Environmental and Social Justice communities.

Assist energy group with environmental planning and entitlements for a carbon sequestration project in Kern County, California.

Assist developer with the acquisition of surface water and groundwater supply for its approved 1,600 residential unit/mixed-use development in the Santa Nella Community Specific Plan area, Merced County, California.

Assist Sites Water Authority in the State Water Resources Control Board Administrative Hearings on the approval of the Sites Reservoir Project.

Successfully represented City of American Canyon in CEQA litigation challenging its approval of a warehouse logistics center project.

Successfully represented City of American Canyon in CEQA litigation challenging its approval of an annexation project.

Successfully assisted developer with environmental review and entitlements for a large mixed-use residential development (1,000+ units) in Dixon, California.

Successfully represented appellants in overturning an agency approval of a cannabis farm located adjacent to a public recreation area in Lake County, California.

Successfully settled CEQA litigation against a family-owned-and-operated dairy farm in Stanislaus County, California.

Select work performed prior to joining Somach Simmons & Dunn:

Successfully represented the City of Los Angeles, California, in its Ninth Circuit challenge to FAA’s Bob Hope “Hollywood Burbank” Airport Replacement Passenger Terminal Project and issuance of Final EIS/ROD under NEPA (City of Los Angeles v. FAA, 63 F.4th 835 (9th Cir. 2023)).

Assisted the City of Los Angeles, California, on several other matters, including its Sidewalk and Transit Amenities Program and MND and Safe Sidewalks LA Program EIR.

Successfully represented the City of Monterey, California, in its challenge to the Monterey Peninsula Airport District’s Updated Airport Master Plan and Final EIR addendum.

Successfully represented the Town of Danville in its challenge to Contra Costa County’s Tassajara Parks Mixed-Use Development Project and Final EIR.

Advised the California High Speed Rail Authority on environmental planning and review for sections of its statewide High-Speed Rail Project.

Assisted several developers in successful environmental review and entitlement of multi-family, medium-to-high density, senior housing, and mixed-use residential developments in Sacramento County and the Cities of Rocklin, Roseville, and Folsom, California, including successful litigation settlements.

Selected Reported Cases

City of Los Angeles v. Federal Aviation Administration, 63 F.4th 835 (9th Cir. 2023)

Insights and Activities

  • Selected for inclusion, Northern California Super Lawyers, Rising Stars, 2023–2025
  • Member of the Federal Bar Association (Sacramento Chapter), the California Lawyers Association, the Sacramento County Bar Association, and the California Association of Environmental Professionals
  • Guest Lecturer, McGeorge School of Law, CEQA Litigation Overview, Environmental Practice course, recurring
  • Panelist, Groundwater in the Face of CEQA, Case Law, and Sustainability, California Association of Environmental Professionals Annual Conference, March 2024
  • Panel Moderator, Subsequent Environmental Review Amidst a Sea of Evolving CEQA Law and Regulations, California Association of Environmental Professionals Annual Conference, August 2021
  • Co-author of First District Court Finds School’s Installation of Light Towers in Its Athletic Field Is Not Exempt from CEQA Review (Saint Ignatius Neighborhood Association v. City and County of San Francisco, App.5th, Case No. A164269 (1st Dist. Dec. 5, 2022)), California Land Use Reporter, Vol. 32, No. 4 (Jan. 2023)
  • Co-author of Fourth District Court Holds View Ordinance Is the Equivalent of a Zoning Ordinance Subject to 90-Day Service of Petition Deadline (Weiss v. City of Del Mar, 39 Cal.App.5th 609 (4th Dist. 2019)), California Land Use Reporter, Vol. 29, No. 2 (Nov. 2019)
  • Recipient of the McGeorge School of Law Anthony M. Kennedy Fellowship, 2016–2019
  • Recipient of the Stauffer Charitable Trust Research Fellow Award, 2019

Recent Articles

Court of Appeal Rejects Challenge to EIR’s Water Supply Analysis

On January 14, 2026, the Third District Court of Appeal issued a published opinion upholding the City of American Canyon’s (City) environmental impact report (EIR) and accompanying water supply assessment ... Read More

Trump Administration Again Proposes Rule to Narrow the Definition of WOTUS with Significant Consequences for Both Wetlands and Development Projects

On November 20, 2025, the U.S. Army Corps of Engineers (USACE) and Environmental Protection Agency (EPA) published a proposed rule to redefine “waters of the United States,” commonly referred to ... Read More

CEQA Reform … A Primer

On June 30, 2025, California Governor Gavin Newsom signed two bills into law that have substantially modified the California Environmental Quality Act (CEQA) to, in large part, increase housing development ... Read More

NEPA and CEQA: The Times They Are A-Changin’

Come gather ‘round people, wherever you roam… The nation’s two oldest comprehensive environmental protection laws are being, or perhaps poised to be, dramatically redrawn. Right around the same time that ... Read More

An Unprompted D.C. Circuit Holds that CEQ Lacks Authority to Issue NEPA Regulations

In a November 12, 2024, opinion, for Marin Audubon Society v. Federal Aviation Administration, No. 23-1067 (D.C. Cir. 2024), the D.C. Circuit Court of Appeals held, of its own initiative, ... Read More

Education

  • University of the Pacific, McGeorge School of Law (J.D., with distinction, 2019), Water and Environmental Concentration
  • University of California, Santa Cruz (B.A., 1999)

Selected Admissions

  • California
  • United States District Court for the Eastern District for California
  • United States Court of Appeals for the Ninth Circuit