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      Effective January 20, 2017 North Wind Group acquires Portage Inc.

Design Build Services


Oftedal Construction, Inc., an employee-owned construction company, and Portage, Inc., an environmental and engineering consulting firm, have combined talents to propose comprehensive design, construction, and QA/QC services to the mining, coal-fired energy, oil and gas, waste containment, and related industries. Having collaborated on mutual projects for more than 10 years, our team offers this experience to the benefit of our clients. We have successfully completed construction of several large-scale industrial ponds and similar projects involving earthwork, concrete, geosynthetic lining, dewatering, drains, pipelines, and other site improvements.


  • Civil, chemical, environmental, electrical, mechanical, nuclear, and radiological engineering
  • Hazardous and radioactive waste management
  • Waste characterization, packaging, transport, and disposal
  • Information technology; custom database design, data management
  • Leadership in Energy and Environmental Design (LEED)/ sustainable management
  • Project/construction management
  • Cost estimating
  • Environmental planning, permitting, and regulatory compliance services
  • Energy management
  • GIS and drafting
  • Research & Development, physical engineering, and life science
  • Facility support services
  • Material recovery facilities
  • Grading and excavation
  • Mine reclamation
  • Dam and dike construction
  • Construction materials hauling
  • Railroad grade construction
  • Large drain pipe and culvert installation
  • Aggregate production
  • Site preparation
  • Highway and road construction
  • Drywall and insulation contractors
  • Heavy and civil engineering construction
  • Environmental construction/ remediation
  • Site characterization
  • Contaminant transport modeling
  • NEPA analysis and document preparation
  • Solid waste management
  • Nonhazardous waste management



Portage is the best-in-class provider of comprehensive engineering and technical solutions for environmental, infrastructure, and energy projects. We partner with our clients to create cleaner, safer and sustainable communities.
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