Skip to main content
Start of main content

Greenhorn Creek Gravel Extraction Project

Working to protect and enhance populations of the foothill yellow-legged frog

  • Grass Valley, California

    Grass Valley, California

Creating a symbiotic relationship between a mining operation and a threatened species

Helping our mining clients build strong relationships with local wildlife authorities is something that Stantec takes pride in. For our part in the Greenhorn Creek Gravel Extraction Project, our work began with the sudden realization that the foothill yellow-legged frog (FYLF)—a threatened species under the California Endangered Species Act—was living within the boundary of the Hansen Brothers Enterprises (Hansen Bros.) Greenhorn Creek Gravel Mine.

In addition to helping Hansen Bros. obtain the second ever issued FYLF incidental take permit, Stantec biologists negotiated with California Department of Fish and Wildlife (CDFW) to test a novel egg mass relocation method in order help the Hansen Bros. continue mining operations. This low-tech approach involved biologists detaching egg masses from large original substrates and successfully relocating them into small hand-constructed rock corrals made from the cobbles found within the stream.

Recently, we’ve gone a step further to assist Hansen Bros. as they enter into the first ever safe harbor agreement with CDFW for this species. We’re working together—Hansen Bros., CDFW, and Stantec—to preserve the site’s local environment and sensitive biological resources as well as keep a multi-generational, family-owned business in operation.

At a Glance

  • Chico, CA
  • Hansen Brothers Enterprises

We're better together

  • Become a client

    Partner with us today to change how tomorrow looks. You’re exactly what’s needed to help us make it happen in your community.

    Contact Us
  • Design your career

    Work with passionate people who are experts in their field. Our teams love what they do and are driven by how their work makes an impact on the communities they serve.

    Join the Team
End of main content
To top