2009-07-30_REVISION - C1991078 - Laserfiche WebLink

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Talvitie Ju1? 0, ??0? Page 2 occur. we recommend that the operator contact the local Division of water Resources office in Montrose Gunnison River basin, water Division 4} to obtain the proper approval for this structure in accordance with applicable state Engineer requirements. ? written con?rnents from the landowner rndlcat?ng their preference that existing sedimentation Pond B be lei as a permanent feature following final reclamation is provided in Exhibit 8 of the permit application package. ?o further action required for this iterri. 2. The operator will need to document that provisions far future maintenance of the pond have been nude and incorporate this into the permit document. "where a silt dam is to be retained as a permanent impoundment as described in 4.5.6 and 4.?5.?, more than sixty ??0? percent of the bond may be released only so long as provisions for sound future maintenance by the permittee ar the landowner have been rrrade with the ?]ivision" [Rule 3.a3.1?3}?c}?• The water quality discussion provided for Pond ? is brief and only generally addresses the permanent impoundment requirements of Rule 4.05.9?13??a}. Haneywood did not adequately demonstrate that water quality in the pond and in the discharge from the pond meet the provisions and criteria of 4.5.9 ?13??a}. There was no specific discussion of surface water quality provided 1n the rev1s1on application. Please provide a denrzonstration for Pond B that includes an evaluatlan of the water quality Yn the pond, a comparison of pond effluent to appropriate stzea?n segment standards, and description of compliance andlor noncompliance with CDP? effluent limits. Por the evaluation ofwater quality m the pond, the CDPHE, water duality control commission -,Agricultural standards for surface water should be used as the testing parameters. These are deemed to be the most appropriate and applicable standards f or a perrnane?at stock pond that i intended to be primarily used for livestock watering..Agriculture estate use classified} surface waters are defined as suitable or intended to become suitable waters for irrigation of crops usually grown in Colorado and which are not hazardous as drinking water for livestock. To show compliance with 4.?5.9?13} ?a}, the operator should demonstrate that the impounded water is of suitable quality for livestock watering. Please provide a laboratory analysis cif this has not already been previously provided and a comparison of the pond water quality with the Agricultural standards for surface water. Please incorporate the requested information into the revision application materials. ?. since Pond B is now being requested as a permanent postmine feature, the operator should aggressively i?nplerr?ent the approved weed control plan and control the growth of Tanaar?sk and o.er weeds that have been recently reported in DRN? inspections of the area in and around Pond B. Let me know 1f you have questions or require addlt?anal ?nformatlon. c: andy drown