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In summary, all channels met the minimum design criteria, and many of the channels were overbuilt <br />with regard to size (bottom width and side slopes), and riprap requirements. The channels are <br />stabilizing. Annual maintenance will be necessary to promote further stabilization in certain <br />locations. Additional grading and repairs are needed along segments of Channels 006-NE2 and 006 <br />Gulch (immediately upstream of the 006-NE2 confluence), and these segments will be excluded from <br />the SL-2 proposed decision. <br />Ponds <br />Drainage and sediment control at the Seneca II-W mine is accomplished by the use of sediment <br />ponds, stock ponds and small area exemptions. The pond inlets, discharge structures and <br />embankments are stable at all pond locations. Pond side slopes and surrounding areas are vegetated <br />and stabilized. Seneca has not yet requested permanent retention for any of the sediment or stock <br />ponds, although they have indicated a revision requesting permanent pond retention will be submitted <br />in the future. <br />The northern part of the original permit area ("D" and "C" Pit areas) drains to the west via the 005 <br />drainage system and is treated by Sediment Pond 005. Small areas along the eastern ridgeline in the <br />northern portion of the original permit area drain to the east, and are treated by Sedimentation Pond <br />009. The pond has historically been stable and functional, and has consistently met CDPS permit <br />discharge limits for settleable solids. <br />The southern part the original permit area ("A" and "B" pits areas) drains to the west via the 006 <br />drainage system, and is treated by Sediment Pond 006. The pond discharge has consistently met <br />CDPS permit discharge limits for settleable solids. A small acreage along the eastern side of the <br />eastern ridgeline in the central portion of the original permit area drains into Sedimentation Pond 009, <br />while a small area along the east side of the ridgeline at the southern end of the original permit area <br />drains into Sedimentation Pond 015. The pond has historically been stable and functional, and has <br />consistently met CDPS permit discharge limits for settleable solids. <br />Facilities <br />Roads <br />Proposed permanent roads in the original permit area that were included within the SL-2 application <br />include Road "G", the Ridgeline Access Road, the Oil Well Access Road, a Section of Road "J", and <br />all or portions of permanent light use roads LU-1, LU-3, and LU-4. These roads are denoted on <br />Figure 2 and Exhibit B (Phase I Bond Release Postmine Topography and Drainage) of the SL-2 <br />application. The approved permit contains permanent retention documentation including landowner <br />letters and As-Built drawings for Road "G" and the Ridgeline Access Road. Landowner request <br />letters have been provided for the various light use road segments, the Oil Well Road segment of <br />RCR 53C, and for the segment of Road "J" within the original permit area. <br />However, As-Built drawings documenting conformance with applicable performance standards and <br />permit specifications for permanent roads has not been provided for these road segments. Permit <br />14