Tacy Hass

Tacy Hass

Tacy focuses her practice on water rights, environmental and regulatory matters, land use and real estate. She advises public and private companies on matters relating to due diligence, permitting, wetlands and critical areas regulations, land use regulations and comprehensive plans, and shoreline development. Tacy represents clients in transactions and litigation involving water rights and real estate, and has experience negotiating with regulatory agencies and advising clients on a wide range of federal and state environmental statutes.

Tacy clerked for the Honorable Robert W. Kiesnowski, 17th Judicial District Judge for the Adams County District Court, and the Honorable Mark D. Warner, 17th Judicial District Judge for the Adams County District Court.


American Bar Association 

  • Section of Environmental, Energy, and Resources
  • Young Lawyers Division

Colorado Bar Association, Water Law Section

Colorado Women’s Bar Association

Denver Bar Association

King County Bar Association

  • Environmental and Land Use Law Section
  • Business Law Section
  • Pro Bono Services  


Significant Water Rights Bill Passes, Alters State Supreme Court Rulings in Hirst and Foster Cases

Co-author, Foster Pepper News Alert, January 2018

Petroleum Technical Assistance Program: A New Tool For Cleanup Of Contaminated Property In Washington

Co-author, Foster Pepper News Alert, November 2017

Winery General PErmit: What You Need to Know and Next Steps for Members of the Industry

Author, Foster Pepper News Alert, July 2017

Acquisition of Water Rights 

Co-author, Update to American Law of Mining, Chapter 113, Rocky Mountain Mineral Law Foundation, February 2017

New Governance: Can User-Promulgated Certification Schemes Provide Safer, Higher Quality Food?

Author, Food and Drug Law Journal, Volume 68, 77-ii, 2013


intro to washington water law

Speaker, KCBA Environmental & Land Use Section CLE & Networking Social, April 2018

Ethics for Law Clerks and Judicial Interns

Speaker, June 2015 

Real EstateEnvironmental & Natural ResourcesEnvironmental LitigationLitigation & Dispute ResolutionWater Quality


Tel: 206.447.8978Fax: 206.749.2165


J.D., University of Colorado Law School, 2012

  • Colorado Journal of International Environmental Law & Policy, Editor
  • American Constitution Society, Vice President
  • H. Thomas Austern Memorial Writing Competition, Honorable Mention, 2012 

B.A., University of Southern California (summa cum laude), 2008

Bar Admissions

Washington, 2015

Colorado, 2012

United States District Court

  • District of Colorado, 2013 
  • Eastern District of Washington, 2017
  • Western District of Washington, 2017


Foster Pepper PLLC, Associate, 2017-Present

White & Jankowski, LLP, Associate, 2015-2017

Adams County District Court, the Hon. Mark D. Warner, Law Clerk, 2013-2015

BKN Murray LLP, Associate, 2012-2013

Benson, Kerrane, Storz & Nelson, P.C., Law Clerk, 2011-2012

University of Colorado Law School

  • Research Assistant for Professor Brunet Marks, 2011
  • Research Assistant for Professor Schwartz, 2010

Related News & Events