2015-12-21_PERMIT FILE - C1981041

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Final contours for the Cameo Borrow Area No. 2 are shown on Exhibit 9C, Tab 14. Cross - sections representing the existing and final grade are shown on Exhibit 53, Tab 13. The area will be graded to the final grade and approximately 6" of topsoil from Topsoil pile number 1 will be distributed on the surface. Coal Canyon Realignment As part of the design for CRDA -2, the Coal Canyon drainage channel was realigned to provide a more uniform, controlled flow between CRDA 1 and 2. The four rock check dams constructed in the channel have caused significant deposition and necessitated frequent maintenance. In order to assure the channel is in equilibrium with the flow regime, the rock check dams were removed and the excess sediment was harvested and used as refuse cover soil during the 2002 reclamation project. The drainage channel was graded to an approximate uniform grade to the cross sections presented on Exhibits 53 and 55. Berms located along the middle and lower sections were leveled so the channel blends naturally into the adjacent terrain. Berms are not utilized to provide the necessary flow capacity along the segment between the dip section concrete structure at the upper end and the two 81" by 59" culverts at the lower. Additionally, the Pond 6 embankment was built up and fortified with riprap. The rock from the check dams was used for the construction of rock groups placed on the reclaimed surface of CRDA -1 & 2 and other reclamation uses. Since material generated from the Coal Canyon Realignment was utilized for the reclamation of CRDA -2, the realignment was performed concurrently with the 2002 refuse pile reclamation project. During 2003, work was performed in Coal Canyon below the outlets of the large double culverts. Scour protection was provided at the outlet of the culverts. Approximately 700 -feet downstream of the double culverts, a transition zone was installed. See Exhibit 8B and Appendix 13 -2, pages Misc -13 through Misc -22 for details of the scour protection and transition zone. Scour protection was installed at the outlet of the upper dip section during 2002. After meeting with Carrie Sheate with the U S Corp or Engineers it was recommended that Coal Canyon drainage, which was previously approved for realignment during the reclamation of Ponds 6 and 10, remain in its current configuration. The re- routing of the Coal Canyon drainage would require a permit from the U S Corp of Engineers. Carrie Sheate proposed that realignment for the sake of routing the drainage back to its original contours would not be a justifiable reason for issuing a Corp Permit. Upon approval of PR -5 Ponds 6 and 10 will be backfilled PR -5 14 -13 (Rev. 05/12)