The purpose of this report is to set forth certain data and analyses developed for specific coal formations located in southwestern Wyoming. The report consists of three parts: I) A summary of the regional and local geology, stratigraphy, and coal depositional environments for the Almond and Lower For t Union formations, Salt Wells area, Rock Springs coal field; II) A similar study for a portion of the Adaville formation, Spring Valley District, Kemmerer field, Hams Fork coal region; and III) A geostatistical analysis which, among other things yields an estimate of coal thickness and area, together with the computer software used to determine these values. Appendices containing laboratory analyses of coal samples, geophysical logs, lithologic descriptions, and geostatistical computer plots are included in each part. Plates, Figures, and Tables are numbered consecutively in each part.