Skip to main content

Environmental Permitting Responsible Permitting,
Streamlined Process.

We leverage our team’s extensive knowledge of construction means and methods to reliably navigate environmental regulations and requirements to plan, permit, design, and build successful projects. Our qualified staff works hand-in-hand with clients and regulatory agencies to streamline the entire process, facilitating efficient construction and implementing project-specific environmental requirements as outlined in Federal, State, and Local permits.

 Metal riverside viewing platform with railings extends over a calm, tree-lined river, with mossy boulders in the foreground and forest reflections on the water.

We focus on natural resource permitting for linear projects, including water and sewer projects, throughout Oregon and Washington.

This experience ranges from desktop due diligence analyses to field surveys through regulatory agency permitting and mitigation site vegetation installation, maintenance, and monitoring. We work to deeply understand local regulations while developing the trust of key stakeholder to ensure your projects move smoothly and consistently through the permitting process.

MacKay Sposito team member in a high-visibility vest holds a tablet while standing in a narrow grassy corridor surrounded by dense forest, with a yellow marker post at left under a cloudy sky.

We focus on natural resource permitting for linear projects, including water and sewer projects, throughout Oregon and Washington.

This experience ranges from desktop due diligence analyses to field surveys through regulatory agency permitting and mitigation site vegetation installation, maintenance, and monitoring. We work to deeply understand local regulations while developing the trust of key stakeholder to ensure your projects move smoothly and consistently through the permitting process.

MacKay Sposito team member in a high-visibility vest holds a tablet while standing in a narrow grassy corridor surrounded by dense forest, with a yellow marker post at left under a cloudy sky.

Riparia Environmental

A subsidiary of MacKay Sposito, Riparia Environmental offers a full range of natural resource-based environmental services for residential, commercial, public works, and retail development. An integrated team of down-to-earth, caring professionals, Riparia serves clients with deep environmental expertise and technical capabilities to meet the ecological and regulatory requirements of each project.

Four MacKay Sposito team members review site plans beside a Riparia Environmental pickup during a roadside field visit.
Four MacKay Sposito team members review site plans beside a Riparia Environmental pickup during a roadside field visit.

Riparia Environmental

A subsidiary of MacKay Sposito, Riparia Environmental offers a full range of natural resource-based environmental services for residential, commercial, public works, and retail development. An integrated team of down-to-earth, caring professionals, Riparia serves clients with deep environmental expertise and technical capabilities to meet the ecological and regulatory requirements of each project.

Our areas of Environmental Permitting expertise:
Field worker in a high-visibility vest kneels on grass, comparing a soil sample to a color chart next to a clipboard by a fresh pile of dirt.

Field Assessments

  • Wetland/waters delineations and reports
  • Critical area assessment and reports
  • Wetland ratings and buffer determinations—WA
  • Oregon Rapid Wetland Assessment Protocol—OR
  • High tide line delineations
  • Ordinary High Water Mark (OHWM) determinations—WA, OR
  • Stream buffer determinations—WA
  • Stream functional assessment methodology—OR
  • Rare plant/noxious weed surveys
  • Wildlife habitat and species surveys
  • GIS mapping, analysis, and database services

Federal Permits

  • National Environmental Policy Act (NEPA) – Environmental Impact Statements (EIS), Environmental Assessments (EA), and Categorical Exclusions
  • Endangered Species Act compliance – programmatic, formal, informal consultations, and no effect assessments
  • U.S. Army Corps of Engineers Section 404, 408, and Section 10 permits

State & Local Permits

  • Wetland/waters administrative orders—WA
  • Wetland/waters removal/fill permits—OR
  • Stream 310 permits—MT
  • Hydraulic project approvals—WA
  • Fish passage plans—OR
  • Section 401 water-quality certifications–WA, OR, MT
  • NPDES construction stormwater permits—Construction stormwater general permit in WA and 1200-C in OR
  • 318 Temporary Turbidity Authorizations—MT
  • Goal 5 permitting—OR
  • Natural resource assessments and restoration, enhancement, and mitigation planning—Clean Water Services
  • Shoreline and critical area permitting—WA
  • SEPA checklists—WA

Mitigation Planning

  • Impact avoidance and minimization consultations
  • Mitigation/restoration feasibility studies

Featured Environmental Permitting Projects

View More Environmental Permitting Projects