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• <br />• <br />• <br />acres (84,506 sq. ft.). This wetland survey is shown on the Site Map, Figure 2 above. A <br />Jurisdictional Determination was approved by US Army Corps of Engineer on February 7, 2008, <br />and the approval letter is provided in Attachment II. <br />(d) Removing temporary or large siltation structures form drainageways <br />after disturbed areas are revegetated and stabilized, if required by the <br />Reclamation Plan: <br />Pond one will be removed and the pond liner disposed off -site at an approved facility. <br />(Requested by Boulder County) Pond two may be left at the request of the landowner. If it is <br />removed, it will be removed and reclaimed in the same manner as Pond #1. Any sediment on the <br />liners will be sampled and removed if required by regulatory requirements and disposed of in an <br />approved facility. The pond areas will be regraded, covered with a plant growth medium and <br />revegetated in the same manner as other disturbed areas at the site. Regrading will occur to <br />provide positive drainage, preventing ponding. <br />(2) Earth dams, if necessary to impound water, may be constructed if the <br />formation of such impoundments will not damage adjoining property or conflict <br />with water pollution laws, rules or regulations of the federal government, the state <br />of Colorado or with any local government pollution ordinances: <br />No new earthen dams will be constructed under this Amendment. <br />(3) All surface areas of the affected land, including spoil piles, shall be stabilized <br />and protected so as to effectively control erosion: <br />All topsoil piles will be seeded with the approved seed mix as discussed above in Section <br />6.3.3(1). The waste rock piles will likely be temporary (less than the life of the mining <br />operation). Alternatively, a waste rock pile may be left post mining as a source of construction <br />aggregate for use by local governments. Appropriate storm water controls will used to retain and <br />filter runoff sediment from the piles. Any exposed areas not disturbed by on -going mining <br />operations will be seeded with the topsoil mix (i.e. road berms as requested by Boulder County). <br />All roads and parking areas will be surfaced with appropriate sized waste rock or purchased <br />crushed rock. <br />(4) The Office may require the submission of baseline site characterization data, <br />sufficient to ensure that impacts from mining will be detected, prior to the initiation <br />of mining, including but not limited to, ambient ground water and surface water <br />quality data sufficient to characterize potential impacted waters: <br />No change from the approved application. Available surface water quality data is provided in <br />Attachment I. No site specific surface water quality data is available. Calais has discussed <br />surface and ground water monitoring programs with the DRMS and is preparing programs to <br />Page 44 <br />