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• SECTION 1-IMPOUNDMENTS <br />RULE REQUIREMENT <br />RULE 4.05.9(14), 4.05.9(14)(a), 4.05.9(17) and 4.05.9(18) <br />• 4.05.9(14) all impoundments shall be inspected by a qualified registered <br />professional engineer or other qualified professional specialist under the direction <br />of a professional engineer. The professional engineer or specialist shall be <br />experienced in the construction of impoundments. <br />0 4.05.9(14)(a) such inspections shall be made regularly during <br />construction, upon completion of construction, and at least yearly until <br />removal of the structure or release of the performance bond. <br />• 4.05.9(17) all impoundments shall be examined quarterly, by a qualified person <br />designated by the operator, for appeazance of structural weakness and other <br />hazardous conditions. The reports shall be retained at or near the mine site, and a <br />copy of the report shall be submitted to the Division on an annual basis (permit <br />page 4.05-7). <br />4.05.9(18) the Division may waive the requirements of 4.05.9(17) for certain <br />impoundments if the permittee adequately demonstrates, in writing, that failure of <br />the impoundments) will not create a threat to public health and safety or threaten <br />• significant environmental harm. The following provisions apply to the review <br />and approval of any waiver from the requirements of Rule 4.05.9(17). <br />Colowyo inspects all impoundments quarterly by a qualified person designated by the <br />operator, for appearance of structural weakness and other hazazdous conditions. The <br />reports are retained at the mine site, and copies of the reports are submitted to the <br />Division in Exhibit lA of this Annual Report. Colowyo submitted Technical Revision 55 <br />(TR-55) to the Division on December 11, 2002. TR-55 requested approval to waive the <br />requirement for quarterly impoundment inspections of impoundments which are not the <br />primary sediment control structure for a particular azea; aze constructed in reclaimed <br />areas of the mine to enhance the approved postmining land use; which are completely <br />incised, or which have a storage capacity no greater than two-acre feet and an <br />embankrnent no greater than five feet in height, while maintaining an annual inspection <br />as required by Rule 4.05.9(14). TR-55 was approved on June 5, 2002 and Colowyo will <br />now be performing annual inspections of these types (stockponds/small depressions) of <br />impoundments. <br />GENERAL DISCUSSION <br />CPDES Impoundments -During calendaz yeaz 2002, the ten CPDES impoundments <br />were inspected on a quarterly basis. Routine maintenance was performed when <br />necessary during the year. None of the impoundments displayed any structural <br />..' weakness or otherwise hazazdous conditions. <br />