jdenny - the only rule/law regarding brushpiles is on page 8 of the 2014 Fishing Regulations. It states "It is unlawful to use and/or place into lakes and reservoirs of this state any container, including but not limited to drums, cans, tubs, boxes or barrels which attract, entice or lure fish into an open cavity within the container". There is no other mention of what can and cannot be placed into a resevoir in the state of Oklahoma. I would add that you would want to use common sense on the materials used for your fish habitat.