what we do

NEPA Documentation

Streamlining environmental solutions

Parametrix is recognized as a go-to firm in the West when it comes to developing and delivering high quality environmental documentation on the most complex and controversial projects. We have completed more than 200 EISs over the past 10 years. Our environmental documents ensure accountability, improve decision-making, engage the public, and protect critical elements of the natural and built environment. Our staff routinely trains environmental professionals nationally on improving the quality of NEPA documents and streamlined environmental program approaches.

Idaho Forestry Program EIS | Parametrix
Idaho Forestry Program EIS
​Idaho State
Client: ​Idaho Department of Lands

This third-party NEPA EIS for the NMFS and the USFWS analyzed the effects of Idaho’s forest practices on state and private lands located in the Salmon and Clearwater basins of north-central Idaho. The EIS addressed, at a landscape scale, the potential effects of adopting the proposed program on forest vegetation, land use, air quality, noise, geology, water resources, wetlands, fish, wildlife, recreation, visual resources, cultural resources, socioeconomics, and environmental justice.



  • Northern Mid-Columbia EA | Parametrix

    Northern Mid-Columbia EA

  • San Juan Basin | Parametrix

    San Juan Basin Energy Connect EIS

  • Columbia River Crossing | Parametrix

    I-5 Columbia River Crossing

  • Aquatic Resources Habitat | Parametrix

    Aquatic Resources Habitat Conservation Plan EIS

  • Idaho Forestry Program | Parametrix

    Idaho Forestry Program EIS

  • Portland-Milwaukie LR EIS | Parametrix

    Portland-Milwaukie Light Rail Project EIS