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Permit Number CO-0071, 7/84 Page 5 of 10 ATTACHMENT A State Special Conditions Condition No. 1 Within 30 days of issuance of the proposed decision, the permittee will submit pond sizing calculations for incorporation into the permit application package. Storage capacity for sediment and water pumped from the mines must be addressed. If the pond is determined to be not in compliance with the regulations, it will be upgraded as necessary within 3 months of permit issuance, and prior to resumption of active mining status at Red Canyon. Condition No. 2 Within 90 days of permit issuance, the permittee will submit a revised stream channel reconstruction plan to the Colorado Mined Land Reclamation Division for review. In addition to the information previously submitted, the stream channel reconstruction plan shall identify the width of the natural stream channel downstream of the disturbance, the maximum width of the reconstructed channel, the depth of the reconstructed channel, and the nature of the bed and bank material to be used for channel reconstruction. The applicant should provide calculations for the design event and for flow velocities in both the 5 ft. wide and 10 ft. wide channel segments. The applicant will identify stream segments where riprap or other erosion protection (\ will be used. A stream profile should be submitted through the entire ~- length of the area proposed for reconstruction showing the original slope and the proposed reconstructed slope. If riprap is used, the plan will include a discussion concerning the sizing, gradation, and placement of riprap. In addition, it vill discuss how the durability of the material used for riprap will be determined. Condition No. 3 Within 30 days of permit issuance, the permittee will submit a plan addressing sediment control measures for the area east of the railroad tracks at the Delta load-out. The plan must contain design drawings, specifications, and calculations sufficient to demonstrate that any drainage meets applicable effluent limitations.