Business Details
32 Years
experience
Trusted Engineering & Environmental Services in Yakima
Founded in 1994, G N Northern has established itself as a trusted provider of engineering, environmental consulting, and construction materials testing services. Our team of geotechnical engineers, environmental scientists, and certified technicians brings decades of combined experience to projects across the Pacific Northwest and Alaska. We prioritize practical solutions that balance client needs with site-specific challenges, ensuring safety, budget adherence, and regulatory compliance.With offices in Washington and Oregon, we serve diverse sectors including renewable energy, education, healthcare, and infrastructure. Our commitment to quality is reflected in rigorous testing protocols, certified personnel, and a project management approach that emphasizes communication and accountability from inception to completion.
Services
Geotechnical Engineering
Environmental Consulting
Pavement Engineering
Geophysical Services
Construction Materials Testing
Special Inspection
Site Remediation
Pavement Evaluation
Foundation Design
Subgrade Preparation
Details
- Year established: 1994
Highlights and features
- Senior staff with up to 23 years of design and consulting experience
- Technicians certified by ACI, ICC, and NICET with 12+ years average expertise
- Certified Minority Business Enterprise (MBE) in Oregon State
- Completed 25+ wind energy projects and 300+ cell tower sites regionally
- Comprehensive services from site selection through construction completion
Associations and certifications
- Minority Business Enterprise (MBE) - Oregon
- American Concrete Institute (ACI)
- International Code Council (ICC)
- National Institute of Certification in Engineering Technologies (NICET)
- American Welding Society (AWS)
Services
Geotechnical Engineering
Our geotechnical engineers conduct comprehensive soil and groundwater investigations for residential, commercial, and industrial projects. We provide foundation design, slope stability analysis, and seismic assessments to ensure safe, cost-effective construction. Our services support infrastructure, renewable energy, and healthcare facilities with tailored recommendations based on site-specific conditions.
Environmental Consulting
G N Northern offers environmental site assessments, hazardous materials surveys, and remediation planning for properties across the Pacific Northwest. Our team identifies regulatory compliance risks and develops mitigation strategies while maintaining OSHA-certified safety protocols. Services include Phase I/II assessments, underground storage tank evaluations, and long-term monitoring programs for contaminated sites.
Pavement Engineering
We specialize in pavement evaluation, design, and testing for haul roads, airports, and transportation infrastructure. Using Falling Weight Deflectometer (FWD) testing and Ground Penetrating Radar (GPR), we assess structural integrity and recommend improvements. Our expertise includes life cycle cost analysis and compliance with AASHTO design standards for both concrete and asphalt surfaces.
Construction Materials Testing
Our certified technicians perform soil, concrete, masonry, and asphalt testing across Washington and Oregon. With mobile laboratories and NIST-traceable equipment calibration, we ensure compliance with ASTM and local building codes. Services include special inspections for structural steel, fireproofing, and reinforcing steel during all construction phases.
Geophysical Services
We offer seismic refraction, ground-penetrating radar (GPR), and DC resistivity testing to map subsurface conditions. These non-invasive methods identify bedrock depth, locate buried structures, and assess geological hazards. Applications include pre-blast surveys, bridge deck evaluations, and fault mapping for infrastructure projects.
Questions
What engineering services does GN Northern offer?
We provide geotechnical engineering, pavement engineering, environmental consulting, construction materials testing, and geophysical services for infrastructure, renewable energy, and commercial projects.
Are your technicians certified?
Yes, our staff holds certifications from ACI, ICC, NICET, and AWS for concrete, masonry, steel, and welding inspections across Washington and Oregon.
Do you work on renewable energy projects?
We've completed geotechnical and pavement engineering services for over 25 wind farms and solar energy facilities in the Pacific Northwest region.
What geographic areas do you serve?
We operate throughout Washington, Oregon, and Alaska with regional offices in Yakima, Kennewick, Spokane Valley, Hermiston, and Hood River.
Can you handle large infrastructure projects?
Yes, our team manages complex projects including hospitals, airports, wastewater treatment plants, and transportation corridors with multi-disciplinary engineering coordination.
