This study was initiated to determine some of the properties of waste shale ash. General studies dealing with a variety of Piceance Creek shales retorted and burned for various times and temperatures were made. One objective of this approach was to define as nearly as possible the best conditions for processing shale ash before it is dumped in order to obtain a well stabilized dump least subject to wind and water erosion and land slides. In the studies two approaches were as follows: (1) physical strength studies of shale ash as a function of a number of variables and (2) chemical studies as a function of these variables in order to define the cementing components in the hydration products of shale ash. The variables studied included (a) composition of shale ash, (b) burning temperature, © burning time, (d) moisture content, (e) degree of compaction, (f) storage time, and (g) storage temperature.