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Olson Environmental is now Riparia Environmental – delivering the same trusted service with a fresh new look.

Solving Problems
Is In Our Nature

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WHAT WE DO

We offer a full range of natural resource-based environmental services for residential, commercial, public works, and retail development. Choose a service badge below to learn more.

Deep community roots and expert service that’s always down-to-earth. For us, helping our clients just comes naturally.
Four employees reviewing a site map while standing next to on of Riparia Environmental's logoed trucks

WHO WE ARE

Riparia Environmental, formerly Olson Environmental and now a subsidiary of MacKay Sposito, has a longstanding history of serving the Pacific Northwest with trusted expertise in environmental compliance, ecological restoration, stormwater management, and landscape services. Our experienced team is dedicated to building resilient ecosystems through responsible solutions. By collaborating with MacKay Sposito’s engineers, scientists, surveyors, and construction managers, we integrate a broad range of disciplines to meet clients’ diverse needs.

Meet the team Join the team

TESTIMONIALS

  • I am thrilled to share my experience with Aaron and his team. They have truly set the standard in stormwater and vegetation management. Their expertise and dedication have been exceptional. From the beginning, they demonstrated a deep understanding of both stormwater management and vegetation solutions.

    Mitchell Lambert
    Association Management Services NW

  • Riparia Environmental (formerly Olson Environmental) has been a trusted partner for years, providing expert advice and critical guidance on wetlands management and environmentally responsible land development. Aaron Gibson and his team have an in-depth knowledge of legal requirements and how to achieve compliance. They offer practical options for navigating environmental challenges.

    Greg Alder

  • Aaron and his team have been Evergreen Homes’ trusted partners for years, advising us and overseeing critical areas including wetlands on the land we develop in the county into residential home-building lots. They have a deep understanding of how the law is applied and give us practical options on how to best manage environmental issues.

    Becky Sundstrom
    Evergreen Homes

 An environmental specialist kneeling down in the grasses of a wetland area, reading the results of a water quality test

DOING IT
THE RIGHT WAY.
NATURALLY.

WHAT SETS US APART

  • We have powerful support

    As a subsidiary of an award-winning consulting engineering firm, we offer an integrated approach with a proven track record for success throughout our region.

  • We know what’s at stake

    Our client-centered approach means we collaborate closely with you, tailoring services to your specific project needs and goals.

  • We know the landscape

    With 30 years of experience, we have the certifications, qualifications, and knowledge for all of your regulatory compliance needs.