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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />9.0 GLOSSARY <br /> <br />Bed rock <br /> <br />The continuous solid rock of the continental crust. <br /> <br />Colluvium <br /> <br />Sediment deposited by a process of mass-wasting or by overland flow. <br /> <br />Dip <br /> <br />The angle between a horizontal plane and an inclined plane, measured from <br />the horiwntal in a plane perpendicular to the strike. <br /> <br />Groundwater Free water residing in pore spaces and voids below the ground surface. <br /> <br />Hydraulic Head <br />(Head) <br /> <br />Water pressure - usually expressed as an equivalent height of a column <br />of water. <br /> <br />Invert <br /> <br />The lowest point in the floor of the tunnel. <br /> <br />Muck <br /> <br />Waste rock or soil resulting from excavation of the tunnel. <br /> <br />Portal <br /> <br />The tunnel entrance. <br /> <br />Strike <br /> <br />The compass direction of the horizontal line in an inclined plane of a <br />structural feature. <br /> <br />10.0 REFERENCES <br /> <br />ASCE Manuals and Reports on Engineering Practice - No. 46, (1965), Reoort on Pioeline Location. <br /> <br />ASCE Report by Committee on Pipeline Planning (1975), Pioeline Desil!n for Water and <br /> <br />Wastewater. <br /> <br />Cashion, W.B. (1973), Geolol!ic and Structure Mao of the Grand lunction Ouadranl!le. Colorado <br />and Utah: U.S. Geological Survey Miscellaneous Geol. Inv. Map 1-736, 1:250,000. <br /> <br />Chronic, Halka (1980), Roadside Geology of Colorado, Mountain Press Publishing Company, <br /> <br />Missoula, Montana. <br /> <br />Clark,lohn; Wiessman, Warren and Hammer, Mark 1., Water Suoolyand Pollution Control, Third <br />Edition. <br /> <br />49 <br />