About Gray & Osborne Inc.


Oxidation Ditch

Gray & Osborne has helped cities, special purpose districts, and government agencies deliver successful public works projects to their communities since 1935. Our staff of over 145 experienced design professionals are located in six offices throughout Washington State and represent a broad range of engineering disciplines allowing us to complete most projects without the use of subconsultants, giving us excellent control over schedule, budget, and quality of product.