Relating to the creation of the criminal offense of diverting or impounding the flow of surface water in a manner that damages the property of another by the overflow of the water diverted or impounded.

HB 1177 would create a new criminal offense in Texas law for altering surface water flow in a way that causes property damage through overflow. Specifically, it makes it a Class C misdemeanor (first offense) or Class B misdemeanor (repeat offense) to divert or block water flow (e.g., by damming or redirecting) that damages a neighbor's property due to overflow. The law includes a defense if someone fills a gully or slough up to riverbank height as permitted under existing water code. This bill directly affects landowners, farmers, or developers who manage or redirect surface water near property lines. It becomes effective September 1, 2025, if passed.