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About me

Sarah Mack has over 25 years of experience representing clients in complex project permitting, environmental review, and related litigation. Her practice emphasizes water rights and water supply planning, including administrative and judicial appeals, for public sector clients and private developers. Sarah also advises clients on proposed legislation and administrative regulations relating to water law and land use.


Practice areas


  1. Environmental and Natural Resources: 60%
    32 years
  2. Appeals: 25%
    32 years
  3. Land Use & Zoning: 15%
    32 years



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Attorney endorsements

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    Sarah is a creative and highly intelligent attorney. I endorse this lawyer's work.


    Richard Wilson Land Use & Zoning Attorney
    Relationship: Fellow lawyer in community

Contact info

Tupper Mack Wells PLLC

2025 First Avenue
Suite 1100
Seattle, WA, 98121


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Best Lawyers in America, Environmental & Natural Resources LawThe Best Lawyers in America (Woodward/White, Inc.)2014
Super LawyerWashington Super Lawyers2014
Super LawyerWashington Super Lawyers2013
Super LawyerWashington Super Lawyers2012
Super LawyerWashington Super Lawyers2011
AV Preeminent 5.0 out of 5 Peer Review RatedMartindale-Hubbell2010
Super LawyerWashington Super Lawyers2010
Super LawyerWashington Law & Politics Magazine2009
Super LawyerWashington Law & Politics Magazine2008
Avvo Top Environmental/Natural Resources LawyerWashington CEO Magazine2008
Super LawyerWashington Law & Politics Magazine2007
Super LawyerWashington Law & Politics Magazine2006
Super LawyerWashington Law & Politics Magazine2005
Super LawyerWashington Law & Politics Magazine2004
Super LawyerWashington Law & Politics Magazine2003
Super LawyerWashington Law & Politics Magazine2002
Super LawyerWashington Law & Politics Magazine2001
Super LawyerWashington Law & Politics Magazine2000
AV Peer Review RatingMartindale-Hubbell1996
Work experience
TitleCompany nameDuration
PrincipalTupper Mack Wells PLLC2007 - Present
PrincipalMentor Law Group PLLC2004 - 2007
PartnerStoel Rives LLP1996 - 2004
PrincipalHillis Clark Martin & Peterson, P.S.1988 - 1996
AssociateHillis Clark Martin & Peterson, PS1982 - 1988
Association namePosition nameDuration
WSBA Environmental & Land Use Law SectionExecutive Committee1998 - 2001
WSBA Environmental & Land Use Law SectionMember1983 - Present
Washington State Bar AssociationMember1982 - Present
Legal cases
Case nameOutcome
Cornelius, et al. v. Washington Department of Ecology, et al.Washington Supreme Court affirmed water right changes for University
Public Utility District No. 1 of Clark County v. Pollution Control Hearings BoardClient won reversal of adverse PCHB decision.
Tulalip Tribes of Washington v. EcologyPCHB and Thurston Co. Superior Court affirmed water right transfer for municipal water supply.
See all legal cases 
Publication nameTitleDate
Western Water Law & Policy ReporterWashington Supreme Court Brings Yakima River Basin Adjudication "One Step Closer to Finality"2013
Western Water Law & Policy ReporterThe State of Washington Tackles Ocean Acidification2013
Western Water Law & Policy ReporterWashington Pollution Control Hearings Board Rules That Puddles Are Not "Waters of the State" Under the Water Pollution Control Act2013
Western Water Law & Policy ReporterDeference to Ecology's Technical Judgments Declines as Washington Court of Appeals Boosts Hearing Board's Authority2012
Law Seminars InternationalThe Painted Summer Hills Dispute: Changes in "Manner of Use" of Groundwater Rights After R.D. Merrill Co. v. PCHB2012
Western Water Law & Policy ReporterWashington's Rainwater Collection Policy Lets 12,000 Rain Gardens Bloom2012
Western Water Law & Policy ReporterWashington Enacts Relinquishment Exception for Water Right Change Applications2012
Western Water Law & Policy ReporterWashington Supreme Court Affirms Groundwater Permit Exemption for Stock-Watering -- Not Limited to 5,000 Gallons Per Day2012
Western Water Law & Policy ReporterWashington Hearings Board Clarifies Relinquishment Exemption for "Determined Future Development"2011
Western Water Law & Policy Reporter"Prevention, Not Enforcement": The Conundrum of "Regulation" Between Water Rights in Washington2011
Western Water Law & Policy ReporterWashington Legislature Adds "Certified Water Right Examiners" to Water Rights Process2010
Western Water Law & Policy ReporterWashington's Municipal Water Law Upheld by State Supreme Court2010
Western Water Law & Policy ReporterWashington State Department of Ecology Reverses Course on Rainwater Collection2009
Western Water Law & Policy ReporterWashington Hearings Board Affirms Department of Ecology's Authority to Issue New Groundwater Rights with Mitigation2007
Western Water Law & Policy ReporterWashington Court of Appeals Upholds Preliminary Permit for Groundwater Testing2007
School nameMajorDegreeGraduated
University of California at Berkeley, Boalt Hall School of LawLawJD - Juris Doctor1982
University of California - Santa CruzPoliticsBA - Bachelor of Arts1974
Speaking engagements
Conference nameTitleDate
22nd Annual Conference on Water Law in WashingtonCo-chair2013
21st Annual Conference on Washington Water LawCo-chair2012
Washington Water Law Conference 2010Co-chair2010
Washington Water Law 2009Co-Chair2009
Washington Water Law 2008Co-Chair2008
Water Rights in Washington: Implications for Water Supply and DevelopmentCo-chair2007
Water Rights Sales and TransfersWater Law Basics2006
Washington Water Law 2006Co-chair2006
Protecting Water Rights and Quality in WashingtonWater Rights2005
14th Annual Conference on Washington Water LawCo-chair2005
13th Annual Conference on Washington Water LawLitigation Update2004
Fundamentals of Water Law in WashingtonWater Rights2003
12th Annual Water Law SeminarInnovative Strategies for Water Resources Development2003
11th Annual WSBA Water Law SeminarWater Quality and Water Rights2002
11th Annual Washington Water Law ConferenceThe Public Interest2002
Water Marketing in WashingtonWater Reallocation2000
9th Annual Conference on Washington Water LawWater Right Changes and Transfers2000