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<br /> <br />' 3. Water Supply and Disposal <br /> Water requirements during development and for full-scale <br /> commercial operation are shown in Figure 5. Water will be available from <br /> the primary source, mine dewatering. Commercial operation will require <br /> about 2500 gpm. Present information indicates that water supply and re- <br /> quirements will essentially be in balance. Any deficiency will be made <br />' up either from on-tract wells or from off-tract sources. <br /> If a surplus of water occurs, the excess will be stored <br /> and then either reinjected or treated and released. <br />' <br /> 4. Off-Tract Facilities <br /> A staging area for materials and supplies will be required <br /> for off-tract facilities. This facility will be located near a rail <br /> siding in either Rifle or Grand Valley, Colorado. <br /> With the expected arrival of Alaskan Crude on the West <br /> Coast, it is generally thought that the Four Corners area and the Texas- <br /> New Mexico crude oil lines will soon be filled with Alaskan crude and <br /> thus the proposed La Sal pipeline which would deliver shale oil into <br /> this area and on to a southern or a western market may not be attractive <br /> in the future. <br /> The C-b Shale Oil Venture is studying an additional alternate <br /> pipeline route which will go generally north and east to tie in with an <br /> existing pipeline system which is reported to have 70,000 to 80,000 <br /> <br />' bbl/day of available space in Casper or Guernsey, Wyoming. This will <br /> allowshale oil to be delivered into the crude oil deficient northern <br /> tier and central states. A generalized routing for these pipelines is <br />' shown in Figure 6. <br /> D. Post Operations <br />' Because the shale oil complex is expected to have an operating <br /> life of about 56 years, it is difficult to predict at this time the dis- <br /> position of the facility after the reserves within the current zone of <br /> interest are depleted. When the oil shale reserves have been depleted <br /> facilities will be removed, the area revegetated and shafts sealed to <br /> prevent injury to man and animals. <br />1 E <br />Resource Recovery <br /> . <br /> The shale interval from which oil will be extracted (310 feet) <br />' contains about 3.0 billion bbl in place. Of this, 1.2 billion bbls <br /> will be recovered by the In Situ Process. If the option is exercised to <br /> surface retort the mined out shale, the total recovery would be about <br /> 1.65 billion barrels. <br /> Mahcolite and dawsonite are present to a very minor extent in <br /> the oil shale zones of Tract C-b, but these deposits are so dispersed and <br /> represent such low concentrations that it is deemed uneconomic to recover <br /> them. <br />' -15- <br />