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R«le 1.04 Chemical analysis from core samples are shown in Appendix D-I of the original application. Logs of drill holes showing the lithologic characteristics and thickness of each stratum and each coal seam are shown in Appendix D-II, VOLUME II. Mon of the overburden present waz shale with an approximate weight of 2800 lbs. per bank cubic yard and an approximate swell factor of 33%. The shale has a silty texture with a hardness of approximately 3-4 on Mohs' scale and a 25% swell factor when compacted. Results of chemical analysis of each stratum within the overburden and interburden are shown in Appendix D-I, VOLUME!!. 2.04.7 Hydrology Description The entire text of the Hydrology settion contained in the original permit application is reproduced in Appendix D of this document for convenient reference purposes. Climatological data is found in Volume I, Section 2.04.08 of the August 1980 permit application. [n addition, the January 1987 Proposed Decision and Findings of Fact previously referenced (Appendix E) contains a more detailed description of ground and surface water resources in the mine vicinity. HGCC does not necessarily endorse the accuracy of the information or conclusions presented in the Proposed Decision and Findings of Fact document but acknowledges that it provides a more comprehensive discussion than contained in the original permit application. 2.04.9 Soils Resource Information A condensed version of the Soils Section contained in the original permit application is reproduced in Appendix B of this document for reference purposes. Complete information on soils may be found in Volume II, Appendix F of the August 1980 permit application. 2.04.10 Vegetation Information Vegetation resources in the mine permit area were initially described by 3R Corporation in the 1977 report "Baseline Vegetation Inventory for the Proposed Hayden Gulch Mine Routt County, Colorado ". This report, found in Appendix M, Volume V of the original application, contains data on vegetative cover, productivity and density of tree species for the entire permit area. The study also identified five "distinct and recognizable" plant communities; appen, oak, sagebrush- snowberry, chokecherry-snowberry, and serviceberry-sagebrush. A sixth plant community, the wet meadow, was also identified and mapped but not studied in detail because it was outside the anticipated area of disturbance. A search for threatened and endangered species (T & E) did not identify any listed species. However, four plants identified only co the genus level belonged to genera which had one or more listed species at that time. In 1980, Morrison-Knudsen Company (M-K) performed a vegetation reference areas study to comply with MLRD regulations regarding the establishment of reference areaz to provide baseline data for revegetation evaluation. The objective of the study waz to select, in consultation with MLRD staff, suitable reference areas to serve az standards of comparison between pre and post mining vegetation conditions. M-K's evaluation identified four major plant communities within • the area to be affected: the aspen type, Gambel oak type, sagebrush type, and the chokecherry type. Reference areas were established for each of these four major vegetative communittes. Sampling was conducted within each vegetation type to obtain the following measurements: standing crop biomazs, herbaceous foliage cover and density of woody vegetation. Sampling T~-63 9f`1~46 2.04-6 ll~is~96 S~Bm.7~Ai_