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2. The untreated drainage from the disturbed area ceases to contribute additional suspended <br />solids above natural conditions, and <br />3. The drainage leaving the pond meets applicable State and Federal water quality <br />requirements, if any, for the receiving streams. The ponds will be removed when the <br />appropriate sections of the regulations are satisfied. <br />When the ponds are removed, the affected land will be regraded and revegetated pursuant to the <br />CDRMS's regulations, Section 4.05.17 and the approved WFC Reclamation Plan. <br />Pond 008 was constructed in an area which contained three small stock ponds on the Burbridge <br />property. The landowner has provided a letter stating that he would like Pond 008 to remain to <br />replace the three ponds which existed in the pre -mining condition. This letter is provided in <br />Attachment 2.05.4(2)(C)-4. The demonstration to allow the permanent retention of Pond 008 is <br />included in Attachment 2.05.3(3)-19. <br />1. Dam Classification Criteria <br />The dam classification criteria follow the guidelines of the USDA Soil Conservation Service <br />Technical Release 60 regarding potential for loss of life and damage as a result of dam failure. <br />This classification criterion is shown below. <br />Class A: No realistic threat of damage to property or life in case of dam failure <br />Class B: Dams located in predominately rural or agricultural areas where failure may damage <br />isolated homes, main highways or minor railroads or cause interruption of use or service of <br />relatively important public utilities. <br />Class C: -- Dams located where failure may cause loss of life, serious damage to homes, <br />industrial and commercial buildings, important public utilities, main highways, or railroads. <br />Special demonstrations are needed for ponds that have Class B or C dams. It is demonstrated <br />below that each of the ponds meets the Class A criteria. <br />Pond 011 - As seen on Map 2.05.3(3)-1 Surface Hydrology, Pond 011 is located on the tributary <br />drainage to Tuttle Draw. The only buildings or structures which require evaluation are the <br />Enstrom buildings located approximately 670 feet northwest of the pond dam. In case of a dam <br />failure, water would have to drop from the base of dam elevation of 5621' and travel 670' to the <br />northwest but it cannot since the upper reach of the tributary channel is in between the dam and <br />Page 2.05.3(3)-16 October 2015 (TR -69) <br />