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<br />• <br />• <br />perhaps by mining activity. The right aide ie a 21-foot cliff of <br />sandstone and shale. <br />Mining has been the principal land use along South Oak Creek <br />and old mining pits and mine dumps have completely destroyed the <br />natural channel between the confluence with unnamed tributary and <br />Twin Pines No. 1 Mine (see Surface Geology and Top of Brookside <br />Coal droving). There is no evidence of subirrlgation and none of <br />flood irrigation having been practiced along this valley. <br />JFSA-78 <br />