Some of this information
was found on the websites for the following agencies/organizations.
Please visit these links for more detailed information regarding
beavers and the construction of flow devices.
A New Way to Solve Beaver Problems by wildlifehotline.org/beavers.html Included is a step-by-step guide written by Skip Hilliker, designer and builder of the Beaver ImpederTM flow device, at wildlifehotline.org/images/Step_by_Step_Guide.pdf. It contains slightly different information than what Skip Lisle suggests for his Beaver Deceivers™.
A general step-by-step guide for building Skip Lisle’s Beaver DeceiverTM and materials lists are on the King County, Washington website.