The Washington Conservation Corps in partnership with city of Bellingham, established, maintained, and monitored a native plant restoration site near Anderson Creek in the Lake Whatcom watershed for a four-year period from 2018 through summer 2021. At the test site, Washington Conservation Corps applied three site treatments that are restoration methods used by the organization.

Study Goals:
The goal of this impact evaluation was to assess the effectiveness of different Washington Conservation Corps restoration methods spanning a four-year period. This study uses a design with randomized control to ascertain correlations between site treatments and plant survival. The site treatments applied to native plant live stake are Plantskydd® deer repellant application, blue tube installation, and a reference (control).

Research Question:
The research question is:

  • Does additional investment in initial restoration techniques and post-restoration care of installed plants lead to increase in successful outcomes?    

The evaluation found the following:

  • This assessment shows statistically significant high native plant survival and low string trimmer damage for the blue tube treatment.

For more information, download the full report.

Full report

Further information

Washington Conservation Corps
Implementing Organization
WA State Department of Ecology
AmeriCorps Program(s)
AmeriCorps State and National
Age(s) Studied
18-25 (Young adult)
26-55 (Adult)
Outcome Category
At-risk ecosystems
Study Type(s)
Study Design(s)
Experimental (RCT)
Level of Evidence
The Watershed Company
Published Year
Study Site Location (State)