By Arizona Revised State Statute 48-3613 it is illegal for a person to divert, retard or obstruct the flow of waters in any watercourse without securing written authorization from the board of the district in which the watercourse is located. Altering a wash may also be a violation of Pinal County’s Floodplain Ordinance. Please contact Pinal County Flood Control at 520-866-6411 to have the issue investigated. However, it is sometimes the case that Pinal County Flood Control doesn’t have the authority to proceed with enforcement. In this case, the issue will be a civil matter between the person who filled in the wash and all damaged property owners. If you believe that your neighbor has impacted you, we recommend approaching your neighbor and calmly explaining the problem to them. If this effort to resolve the problem is unsuccessful, you may need to consider private litigation.