Sonoma County Property Management How Can I File A Legal Claim Against Sonoma County, CA.?

How can I file a legal claim against Sonoma County, CA.? - sonoma county property management

My dog was injured because of faulty design of a grid of drainage on the property in the county. I am committed to save $ 2,000 in medical treatment, the cost for my dog. I know it is a procedure for filing a claim, but I do not know what the procedure. Wil Any information would be welcome. Thank you.