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• Chemical analysis from core samples are shown in Appendix D-I of the anginalapplicatian. 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. Most of the overburden present was shale with an approximate weight of 2800 lbs. per bank cubic yazd and an approximate swell factor of 33%. The shale has a silty texture with a hazdness 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 interbutden aze shown in Appendix D-I, VOLUME II. 2.04.7 Hydrology Description The entire text of the Hydrology section 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 pemit application. In 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 appliartion. Additional hydrology information including the most recent hydrologic impact analysis can be found in Exhibit 7 of the Phase II/Phase III Bond Release Application, and the DMG's findings included in the bond release approval. 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 pemut application. 2.04.10 Vegetation Information Vegetation resources in the mine permit azea 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; aspen, oak, sagebmsh-snowberry, chokecherry-snowberry, and serviceberry-sagebmsh. A sixth plant community, the wet meadow, was also identified and mapped but not studied in detail because it was outside the anticipated azea of disturbance. A seazch for threatened and endangered species (T & E) did not identify any listed species. However, four plants identified only to the genus level belonged to genera which had one or more listed speues at that time. In 1980, Morrison-Knudsen Company (M-K) performed a vegetation reference aeeas study to comply with MLRD regulations regazding the establishment of reference aeeas to provide baseline data for revegetation evaluation. The objective of the study was to select, in consultation with MLRD staff, suitable reference areas to serve as standazds of comparison between pre and post mining vegetation conditions. M-K's evaluation identified four major plant communities within the azea to be affected: the aspen type, Gambel oak type, sagebrush type, and the chokecherry type. Reference aeeas were established for each of these four major vegetative communities. Sampling was conducted within each vegetation type to obtain the following measurements: standing crop biomass, herbaceous foliage cover and density of woody vegetation. Sampling 2.04-G Revised - 06/01