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haul road drainage systems are designed to reduce sedimentation or other con- <br />tamination that might affect the existing hydrologic balance. <br />The valley floor of the Yampa River meets geomorphic, vegetative, soil, and <br />hydrologic criteria to qualify as an alluvial valley floor along its full extent <br />within the study area. Although no actual mining activity takes place on or <br />adjacent to this alluvial valley floor, Sun Coal Company's existing office and <br />loadout facilities are located adjacent to or cross over the Yampa River. These <br />structures were constructed with a minimum of .disturbance to the valley floor. <br />All of these structures are designed to be protected from the 100-year flood <br />which, in turn, protects the river from any potential contamination during <br />flooding. In addition, the bridge and conveyor which cross the river have been <br />designed to prevent contamination by coal dust and mud. <br />These facilities were constructed in 1976 under permit #76-61, and no addi- <br />~j-tional facilities are planned. The facilities will be deeded to the landowner <br />or sold prior to obtaining bond release. <br />Upon review of the reconnaissance AVF study, CMLRD concurred with the <br />conclusion that no AVF areas exist outside of the Yampa River flood plain. A <br />question regarding the extent of alluvial deposits along Coal View Gulch and <br />their relationship to the Yampa River alluvium was raised. A small isolated <br />area of stream-laid deposits was found along Coal View Gulch. Drainage from the <br />Meadows No. 1 area and from the existing haul road will have little impact on <br />the Coal View Watershed; additionally, the small area delineated is not <br />regionally or locally significant to agricultural productivity. <br />- 394 - (Rev. 5/86) <br />