Surveying, land
Northwest Surveying, Inc. Beaverton, OR
Northwest Timberland Consulting, Inc PLEASANT HILL, OR
Olson Engineering, Inc. Vancouver, WA
Owossow, Inc. Elmira, OR
Stuntzner Engineering & Forestry, LLC (Forest Grove) Forest Grove, OR
W.B. Wells & Associates, Inc. Portland, OR
Weddle Surveying, Inc. Tigard, OR
Westlake Consultants, Inc. Tigard, OR
WH Pacific, Inc. Portland, OR
Wilbur Tunny McCollum Lebam, WA