Backed by a solid reputation and secure relationships with clients and regulatory agencies alike, PHS is an expert in meeting client needs quickly, efficiently, cost-effectively, and always to the best outcome.

We provide excellent, proactive service to a variety of public and private entities for diverse projects. One of the most valuable resources we offer clients is our comprehensive understanding of state, federal, and local regulations, water quality standards, and endangered species issues - critical knowledge for permitting and constructing projects in a timely manner, ensuring budgets and schedules are met. 

Our clients include engineering firms, law practices, architects, real estate developers, private property owners, state and federal regulatory agencies, planners, parks departments, public works departments, and other municipal agencies.

All of our clients receive expert advice and the personal attention that ensures all projects -
certainly those with complex environmental issues - are conducted on time and on budget.

Private Development

Copeland Sand and Gravel
Fred Meyer
Goodwill Industries
Home Depot
Matrix Development
Roseburg Forest Products

Local Jurisdictions | Cities | Counties

City Albany, OR
City of Ashland, OR
City of Bend, OR
Clackamas County, OR
Clark County, WA
Clatsop County, OR
Columbia County, OR
City of Corvallis, OR
City of Dallas, OR
City of Fairview, WA
City of Forest Grove, OR
City of Gresham, OR
City of Happy Valley, OR
City of Hillsboro, OR
Jackson County, OR
Junction City, OR
City of Keizer, OR
City of Lake Oswego, OR
Lincoln County, OR
City of McMinnville, OR
Multnomah County, OR
City of Oregon City, OR
City of Portland, OR
City of Salem, OR
City of St. Helens, OR
City of Tigard, OR
Tualatin Hills Parks and Recreation District
City of Toledo, OR
City of Vancouver, WA
Washington County, OR
City of West Linn, OR  
City of Wilsonville, OR
City of Woodburn, OR
Yamhill County, OR

Ports | Airports

Port of Newport
Port of Portland
Port of Siuslaw
Port of Camas
Port of St. Helen's
Port of Tillamook Bay
Port of Cascade Locks
Port of Garabaldi
Port of Umpqua
Port of Nehalem

State | Federal

Oregon Department of Administrative Services
Oregon Department of Energy
Oregon Department of State Lands
Oregon Department of Transportation
Oregon Economic and Community Development Department

Law Firms

Ball Janik LLP
Black Helterline LLP
Davis Wright Tremaine LLP
Dunn Carney Allen Higgins
and Tongue LLP
Garvey Schubert Barer
Jordan Schrader Ramis PC
Miller & Wagner LLP
Miller Nash LLP
Perkins Coie LLP
Schwabe, Williamson & Wyatt
Stoel Rives LLP


Beaverton School District
Columbia Gorge Community College
Estacada School District
Forest Grove School District
Gresham Barlow School District
Hillsboro School District
North Clackamas School District
North Marion School District
Oregon Trail School District
Portland Community College
Portland State University
Tigard Tualatin School District

Non Profits

Columbia River Estuary Study Taskforce
Upper Deschutes Watershed Council
The Nature Conservancy
The Wetlands Conservancy
Trust for Public Lands


Clean Water Services
NW Natural
Portland General Electric