Laserfiche WebLink
.. <br />'~ 2.04.6 <br />RESPONSE continued <br />Creek is a 400 ft. thick shale sequence underlain by about 1000 <br />ft. of massive sandstones interbedded with sandy shale, shale <br />and marine Mancos shale. <br />Ground Water Aquifers <br />The principal ground water bearing zones in the Hayden Gulch <br />area are the coals and massive sandstones of the Williams Fork <br />and Iles formations. Ground water moves northeast following the <br />dip of the strata toward the axis of the Watering Trough syn- <br />cline. These zones are recharged at and near their south- <br />western outcrops along canyon walls. Discharge takes place at <br />seeps and springs along the valley floors where the aquifers <br />outcrop. The aquifers are dry near their outcrops to the south <br />of the site and contain increasingly more water to the northeast. <br />. (i) NATURE OF COAL AND_ OVERBURDEN <br />The Hayden Gulch property contains five coal seams that <br />dip at approximately 9 percent or 5° in a northeasterly direc- <br />tion. The seams vary in thickness from 1.2-7.0 feet with a <br />combined average of approximately 22 feet. The average over- <br />burden and interburden ranges from approximately 9.0-50.0 feet <br />between coal seams. <br />(ii) The cropline of the coal to be mined is contained on Exhibit <br />B. The dip of. the coal is approximately 9 percent (5°) to the <br />northeast. <br />(b) (i) Chemical analysis from core samples are shown in the <br />appendix D-I. <br />(A) Location of subsurface water zones <br />SEE APPENDIX R, VOLUME VII For Complete Details <br />. (B) Logs of drill holes showing the lithologic characteristics and <br />thickness of each stratum and each coal seam are shown in <br />Appendix D-II, VOLUME I. <br />