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Oil Pipeline. A high- pressure, oil pipeline owned by AMOCO Pipeline Company traverses the permit area from the <br />southwest to the northeast, approximately paralleling County Road 107. The pipeline is constructed of 6 -inch <br />diameter, welded steel pipe and is buried approximately 4 feet deep. <br />Count Road 107. County Road 107, which traverses the property from the southwest to the northeast, is an <br />unimproved gravel road that is maintained by MCM. A portion of the road lying in the southeast section of the mine <br />complex has been abandoned by Moffat County and vacated to MCM. The vacation document is presented in Exhibit <br />6, County Road Vacation Document. <br />State Highway 13. State Highway 13 is a two (2) lane, asphalt highway which links Craig and Meeker, Colorado. <br />The highway receives only moderate use. State Highway 13 traverses proposed life -of -mine underground mining <br />operations. Refer to the Life -of -Mine Plan Map (Map 22). <br />Railroad. A Denver and Rio Grande Western Railroad spur traverses the permit area. This railroad is a spur line, <br />which services Colowyo Coal Company and MCM coal loading facilities. The railroad bed is located in the river <br />bottoms of both the Yampa and Williams Fork Rivers. <br />Irrigation Ditches. Numerous irrigation ditches are located in the river bottoms within the permit area. These ditches <br />are used for irrigating grass, hay, and wheat fields. <br />Renewable Resource Lands <br />The following renewable resource lands have been identified within and adjacent to the permit area: <br />• Alluvial Valley Floor <br />• Yampa River <br />• Williams Fork River <br />• Sandstone Aquifers <br />Alluvial Valley Floor. The river valley bottoms of both the Yampa and Williams Fork Rivers are classified as alluvial <br />valley floors (AVF). The ground surface in these alluvial valleys supports sheep and cattle ranching operations. The <br />direction of ground water flow in the alluvium is generally parallel with river valley trends as well as towards the <br />river. A detailed discussion of the hydrologic characteristics of the alluvial valley floors is presented in Section <br />2.04.7, Hydrology Information. <br />Yampa River. The Yampa River meanders across the permit area from the northeast to the southwest. The Yampa <br />River is a snowmelt stream and is dependent on the winter snowpack for much of its annual flow. Runoff from <br />thunderstorms accounts for its peak flow during the summer and fall months. A detailed discussion of surface <br />hydrology is presented in Section 2.04.7, Hydrology Information. <br />Williams Fork River. The Williams Fork River is a major tributary to the Yampa River. The Williams Fork River <br />traverses the southern part of the permit area where it joins the Yampa River. The Williams Fork River is a snowmelt <br />stream and is dependent on the winter snowpack for a majority of its annual flow. Thunderstorms account for much <br />of its peak flows during the summer and fall months. Refer to Hydrology Information, Section 2.04.7 for more <br />information on surface water. <br />Sandstone Aquifers. The term "aquifers" as defined by 30CFR817.126 and by Rule 4.20.4 are renewable resource <br />lands that serve as a "significant source of water supply to any public water system ". However, as discussed in <br />Section 2.04.7, Hydrology Information, the sandstone aquifers which underlie the MCM permit area do not serve as a <br />"significant source" or even a minor source of water supply to a public system and as such cannot be classified as a <br />renewable resource land. The four (4) major sandstone aquifers within the permit area are 1) Trout Creek Sandstone, <br />2) Twentymile Sandstone, 3) Middle Sandstone, and 4) White Sandstone. The depth of the sandstone aquifers varies <br />throughout the mine area. The average thickness for the major sandstone aquifers is as follows: 1) Trout Creek <br />TR14 -36 2.05 -49 Revised 03/10/14 <br />