What is a good way to keep ground squirrels from tearing up my hillside. Thanks

I am a Ventura resident and have been actively involved in getting good IPM in our public schools and in educating others about alternatives. I have been approached by our County Supervisors to help them formulate a plan that will eliminate the use of anti-coagulant rodenticides that are currently used for ground squirrels - the rodenticides are used to protect dams and levees. The water protection district has no idea how to approach this and wanted to know if I could do some research. That is why I am contacting you - do you know of any other cities/counties dealing with IPM that may have already addressed this issue? Especially in the arena of dams and levees? Thanks so much! I look forward to your response.