Business Details
26 Years
experience
Expert Geotechnical Engineering & Environmental Services in Washington
Since 2000, Nelson-Geotechnical Associates has been dedicated to understanding the intricate details of unique project sites, engineering systems for long-term structural stability, and mitigating risks through advanced geotechnical analysis. Our expertise in Washington's complex geology and topography stems from 25 years of specialized experience, supporting clients through property development, renovation, and decommissioning projects. We provide comprehensive services from preliminary evaluations to construction monitoring, utilizing soil and rock mechanics to assess subsurface conditions, design earthworks, and implement foundation systems.Our team combines technical precision with practical problem-solving, offering environmental assessments, landslide mitigation, coastal infrastructure design, and expert witness litigation support. With offices in Woodinville and Wenatchee, we serve both Western and Central/Eastern Washington, maintaining a commitment to integrity, trust, and quality in every project. Our professionals hold key certifications in geotechnical engineering and geology, ensuring adherence to the highest industry standards across development support, infrastructure design, and environmental remediation projects.
Services
Geotechnical Engineering
Environmental Assessments
Expert Witness Services
Infrastructure Design
Landslide Mitigation
Details
- Year established: 2000
Highlights and features
- We provide 25 years of specialized experience in Washington's complex geology
- Our team includes licensed engineers and geologists with technical certifications
- We deliver cost-effective solutions through comprehensive subsurface analysis
- Our professionals implement innovative foundation design methodologies
- We offer responsive project monitoring for development and infrastructure projects
What people say
Professionalism
Responsive service
Technical expertise
Cost-effective solutions
Practical reasoning
Services
Geotechnical Engineering
We conduct subsurface investigations and foundation design using soil mechanics principles. Our team evaluates natural slopes and engineered soil deposits to assess risks and develop earthwork solutions. With expertise in Washington's geological conditions, we provide construction monitoring for commercial and residential developments.
Environmental Assessments
Our environmental services identify and mitigate hazardous site conditions through comprehensive assessments. We develop remediation strategies for development projects, focusing on sustainable practices that minimize ecological impact while ensuring regulatory compliance for property acquisitions and renovations.
Landslide Mitigation
We assess static and dynamic stability of natural and man-made slopes, designing mitigation measures for residential and infrastructure projects. Our engineers implement monitoring systems and develop predictive models to prevent slope failures across Washington's diverse terrain.
Infrastructure Design
We engineer earthwork and foundation systems tailored to project-specific conditions. Our designs incorporate advanced instrumentation monitoring and compaction testing to ensure structural integrity for transportation networks, utility systems, and public infrastructure developments.
Expert Witness Services
Our licensed professionals provide litigation support through geotechnical engineering analysis. We offer expert testimony in construction disputes, slope failure cases, and infrastructure liability matters, backed by technical expertise and field experience dating to 2000.
People
Khaled Shawish
Principal
Licensed Professional Engineer with extensive experience in geotechnical engineering solutions. Specializes in foundation design and slope stability analysis for complex Washington State projects.
Lee Bellah
Senior Geologist
Licensed Geologist with expertise in subsurface characterization and environmental remediation. Provides technical leadership for site investigation and hazardous material mitigation projects.
Alex Rinaldi
Project Manager
Licensed Professional Engineer and Geologist managing infrastructure and environmental projects. Focuses on client collaboration for successful project execution across Central Washington.
Danielle St. Pierre
Operations and Business Development
Business development leader connecting technical services with client needs. Ensures operational efficiency while expanding Nelson Geotechnical's community-focused engineering solutions.
Questions
What geotechnical services do you offer?
We provide subsurface investigations, foundation design, slope stability analysis, construction monitoring, and environmental site assessments tailored to Washington State's geological conditions.
Do you handle both commercial and residential projects?
Yes, we serve commercial developers, municipalities, and residential clients with geotechnical engineering solutions for new construction and property renovations.
How many years have you specialized in Washington geology?
Our team has 25 years of specialized experience in Washington's unique geological conditions since our founding in 2000.
What areas do you serve in Washington State?
We operate throughout Western Washington and Central/Eastern Washington regions from our Woodinville and Wenatchee offices.
Can you assist with environmental remediation projects?
Yes, our environmental services include hazardous site assessments and remediation strategies for development and property acquisition projects.
Reviews (4)
Mitchell Gasser
Mar 19, 2022
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Nelson Geotechnical Associates Inc is a great company, with a knowledgeable and hard working staff. They are always responsive and pleasant to work with. I would highly recommend them to anyone.
Nw Race Karts
Mar 13, 2022
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Do not use if you are not a government body, they forget to mention that as it shows how they work with private parties. They wont go to court for you if the state is involved but may still take your checks. They told me they don't work with issues having to do with public agencies, keep in mind all of your Property's and homes are on public lands and taxable so your at risk not knowing this.good luck.
Ryan Robison
Apr 06, 2021
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Would highly recommend, extremely pleased. We hired Nelson Geotechnical for a walk through evaluation of our property regarding slope stability and erosion. Carston was incredibly helpful, knowledgeable, and it's great to work with a professional who clearly enjoys what they do. He helped us understand all the documentation and reports available, and made some great recommendations to go along with his observations. Would recommend their services to any homeowner who'd like to be in the know about the ground underneath and around their house!
Paul Sebastian Urcan
Feb 14, 2021
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I highly recommend Nelson Geotechnical Associates Inc. I needed a geotechnical report and Carston did an excellent job, he helped me by answering all the questions that I had and he took his time make sure I understood everything, it was a pleasure to work with him.
