Our Team

Staff Photo in Johnson Creek

Photos by Bruce MacGregor Photography


Board of Directors

Andrew Brown (2016) Jurisdictional Representative; Conservation Program Supervisor, East Multnomah Soil & Water Conservation District

Andrew joined EMSWCD as the Conservation Program Supervisor in August 2015. He oversees EMSWCD’s Land Legacy Program, Grants Program and Headwaters Farm Incubator Program, and serves as the District-wide planner. Andrew’s planning and conservation experience is mainly in South Africa, where he worked in the public, non-profit and private sectors. He worked as a program manager in the Park Planning and Development Department of South African National Parks where he coordinated a regional landscape conservation initiative, and has managed various conservation planning, land conservation, stewardship and restoration projects.

Marianne Colgrove (2017) Deputry IT Director, Reed College; Founder, Friends of Tideman Johnson; Committees: Facilities, Fundraising

I’ve been involved with JCWC since 2007 when I helped found the Friends of Tideman Johnson and the Council sponsored our first Community Watershed Stewardship Grant.

Tim Crawley (2015) – Vice Chair; Attorney at Law, Preg, O’Donnell & Gillett; Committees: Executive, Facilities

Timothy Crawley has been a volunteer with Johnson Creek since 2013 and joined its Board in 2015. He currently serves on the Executive Committee and as the Board Secretary. He is an advocate for the environment and is passionate about habitat restoration for our local species, particularly the salmon that populate our rivers and creeks.

Peregrine Edison-Lahm (2019) Environmental Scientist, Self-employed. Committees: Outreach, Fundraising

Peregrine Edison-Lahm has been involved with JCWC since 2010, when, as a professional intern, she did the detective work to map all the environmental projects that had been performed in the watershed. She was also our interim volunteer and outreach coordinator in the summer of 2015. Her other environmental work includes watershed planning in Hawai’i, and mapping projects across the country with Defenders of Wildlife. She is an alumna of Oregon Graduate Institute and Claremont McKenna College. Currently, when she is not learning web development or working as a personal organizer, she can be found cycling around town, salsa dancing, or tango dancing.

David Gruen (2019) – Contract Researcher, USEPA; Committees: Outreach, Land Use

David Gruen works as an Oak Ridge Institute for Science & Education (ORISE) Research Participant for the Environmental Protection Agency’s Region 10 Office of Water and Watersheds where he works to protect and restore water quality. David joined the Board in January 2019 and is a member of the Land Use Planning and Outreach Committees. In his spare time, he enjoys eating and drinking his way through Portland’s incredible food scene, hiking and camping, and watching baseball. David holds a master’s degree from the Bren School of Environmental Science & Management at the University of California, Santa Barbara and a Bachelors of Arts from the University of Michigan.

Katie Holzer (2015) – Jurisdictional Representative, City of Gresham; Committees: Interjurisdictional

Katie is a Watershed Scientist for the City of Gresham. She has a PhD in ecology and spends her time studying the interactions between the stormwater, soils, streams, and wildlife. She has volunteered with the Council since 2008, has been serving on the Board since 2015, and is the Chair of the Johnson Creek Inter-Jurisdictional Committee.

Roy Iwai (2007) – Jurisdictional Representative, Multnomah County; Committees: Community Inclusion, Interjurisdictional

I manage the Water Quality Program for Multnomah County’s Transportation Division as the Water Resources Specialist. I have a keen interest in fish of all kinds and so I approach watershed management from a fish’s point of view. I am an idealist and optimist, and I believe we will learn how to live with nature

Melanie Klym (2013) – Chair; Water Resources Engineer, GeoEngineers; Committees: Executive, Land Use

Melanie Klym has been volunteering with the watershed council since 2009 when she co-founded the annual Creek Clean-Up through Green Lents. She has been serving on the Board since 2013 and is currently the Chair and participates in the Executive and Land Use committees. Outside of the Council, she works as a water resources engineer at GeoEngineers to restore and enhance fish passage, floodplain connectivity, and in-stream complexity throughout the Pacific Northwest. Melanie enjoys watching the birds in her backyard wildlife habitat with her cats from the safety of the catio.

John Nagy (1995) – Jurisdictional Representative, Clackamas County; Committees: Governance, Interjurisdictional

John is a Technical Services Specialist for Water Environment Services, Clackamas County. With over thirty years’ experience in the water quality field, he brings a focus on storm water and riparian issues that can impact the watershed. His first involvement with Johnson Creek started over 25 years ago with the Johnson Creek Corridor Committee (which later became the JCWC) and has continued ever since. For much of that time, he has also been a member of the Johnson Creek Inter-jurisdictional Committee. In addition, he has served on the North Clackamas Urban Watersheds Council and the Clackamas River Basin Council. In his off time he can usually be found working on restoring and operating vintage trolleys for a local non-profit museum.

Bruce Newton (2014) – Treasurer; Former Director, West National Technology Support Center, Natural Resources Conservation Service (retired); Committees: Executive, Governance, Interjurisdictional;

Bruce Newton is a retired Federal scientist.  He previously held positions with the US Environmental Protection Agency and the US Department of Agriculture.  Upon retiring in 2013 Bruce began volunteering at the Council and in 2014 joined the Board.

Sarah Sapienza (2019) – Fisheries Biologist, Oregon Dept. of Fish & Wildlife; Committees: Fundraising, Outreach;

Sarah Sapienza has worked for the past 9 years at Oregon Dept. of Fish and Wildlife as a fisheries biologist. She has had many positions there including tagging sturgeon, spawning ground surveys and coded wire tagging salmon at fish hatcheries across the state. She started volunteering as a Creek Crew and realized that she wanted to be more active with Johnson Creek Watershed Council. She has a River Restoration certification from Portland State University and a B.A. in Environmental Science from Marylhurst University.

Mary Ann Schmidt (2015) – Portland State University faculty, retired, Environmental Science and Management Department; Chair, Crystal Springs Partnership; Committees: Fundraising

I am the liaison between the Crystal Springs Partnership and the Johnson Creek Watershed Council board.

Dick Schubert (2013) – Chemist, retired; Committees: Executive, Governance, Facilities;

Dick Schubert has previously been JCWC chair and vice-chair. He holds a doctorate in Chemistry from Purdue University and has completed a career in pharmaceutical and biotech research and development. Outside of JCWC he manages his family philanthropic activities supporting local environmental, educational, civil rights, and human rights causes.

Samantha Sharka (2018) – Natural Resources Specialist, AKS Engineering and Forestry; Committees: Community Inclusion, Fundraising

Sam currently works as a Natural Resource Specialist for AKS Engineering and Forestry and has extensive ecological restoration experience. A self-described plant nerd, Sam enjoys all things plants including botanic illustration, wildcrafting, and keying them out!

Charlotte Trowbridge (2019) – Conservation Education Manager, Tualatin Soil & Water Conservation District; Committees: Outreach, Community Inclusion;

Charlotte Trowbridge works as the Conservation Education Program Manager at the Tualatin SWCD. She coordinates adult education opportunities and communicates with the public about natural resource issues and solutions. Charlotte previously worked for state agencies, focusing on the science and policy of wetland mitigation, as well as for a non-profit conservation organization, conducting research on threatened and endangered plant populations. She has a Master’s degree in Geography from University of British Columbia and a Bachelor’s degree in Environmental Studies from Linfield College.

Marie Walkiewicz (2014) – Secretary; Jurisdictional Representive, City of Portland; Committees: Executive, Facilities

Marie Walkiewicz is a Senior Planner at Bureau of Environmental Services on the Eastside Watersheds Team, where she focuses on project planning, environmental policy and stakeholder engagement.

Advisory Circle

The Johnson Creek Watershed Council Advisory Circle is a group of regional community leaders with diverse experience, expertise, and affiliations, which they use to advance the Council’s mission, goals, and values.

  • Bill Bakke, President, Native Fish Society
  • Earl Blumenauer, U.S. House of Representatives
  • Diane Boly, Partner, Boly Welch
  • Robert Gootee, President and CEO, MODA Health
  • Mike Houck, Executive Director, Urban Greenspaces Institute
  • Teresa Huntsinger, Engineer, OTAK
  • Steve Johnson, Professor, Portland State University
  • Gary Klein, Wells Fargo (retired)
  • Walt Mintkeski, Environmental and Energy Efficiency Engineer
  • Jonathan Nicholas, Vice President, MODA Health
  • Gary Rydout, Education Consultant
  • John Wrenn, Senior Vice-President, UBS

The Johnson Creek Watershed Council actively works with community groups, local and federal governments, schools, businesses, other nonprofits and various individuals throughout the year who help us serve our mission.

Jurisdictional Partners

What is a jurisdictional partner?

The Johnson Creek Watershed includes parts of two counties (Clackamas and Multnomah) and five cities (Damascus, Gresham, Happy Valley, Milwaukie, and Portland). Jurisdictional representatives are jurisdictional staff members voluntarily assigned by their respective jurisdictions to the JCWC board of directors in an ex-officio (non voting) capacity. The intent of having jurisdictional representatives serve on the JCWC board is to ensure successful communication and close coordination between the Watershed Council and the watershed jurisdictions with whom we work closely and cooperatively. Though non-voting board members, jurisdictional representatives advise and make recommendations to the board.