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water diversions away from the disturbed areas (4.05.3(1)). <br /> C. Stream Channel Diversions <br /> ERMR has not proposed stream channel diversions at NHN. The two draws within <br /> the permit area are Nygren and Meehan. <br /> D. Sedimentation Ponds <br /> Two sedimentation ponds have been constructed within the permit area to treat <br /> runoff from all disturbed areas. The capacity of the ponds will be achieved with a <br /> combination of partial excavation below grade and constructed embankments. <br /> Pond NHN-001 has been constructed along the southern permit boundary, Pond <br /> NHN-002 is located in the northwest part of the permit area. The design <br /> information for the sedimentation ponds is located in Section 2.05.3(4) of the <br /> permit application package, and the locations of the sedimentation ponds are <br /> shown on Map 2.05.3(4)-1 of the permit application package. <br /> 1. None of the two sediment ponds are approved to be located within a <br /> perennial stream (4.05.6(1)(b)). <br /> 2. Alternative design criteria and specifications have not been proposed for use <br /> in sediment pond design and/or construction (4.05.6(11)). <br /> E. Acid-forming and Toxic-forming Spoil <br /> ERMR developed plans for sampling overburden during mining to identify the <br /> quantity and quality of deleterious material. Spoil and mine soil reconstruction <br /> plans that address acid and toxic-forming materials in the NHN permit area is <br /> given in Section 2.05.4(2)(d). Any acidic or toxic forming spoil was buried in the <br /> pit in accordance with the approved plan. <br /> F. Impoundments <br /> Other than the two sedimentation ponds, no impoundments are proposed for <br /> construction in conjunction with the NHN operation (4.05.9). <br /> G. Surface and Ground Water Monitoring <br /> ERMR established and conducted a surface water and groundwater monitoring <br /> program that gathered baseline and operational water quantity and water quality <br /> data in order to monitor the effects of the mining operation on the surface and <br /> subsurface water within and/or adjacent to the permit area. The Hydrologic <br /> Monitoring Plan is described in Section 2.05.6(3). <br /> 1. The applicant will conduct monitoring of ground water in a manner approved <br /> 21 <br />