Coeur Rochester, Inc. (CRI) has been conducting notice-level exploration at the South Mystic Springs project, located near the Nevada-Packard mine area, under case file number N-89745. Under the South Mystic Springs notice, CRI drilled two drill sites within non-contributing elements of the Rochester District National Register Eligible District. A qualified archeologist was on site during the construction of the drill sites to ensure that no contributing elements were damaged or destroyed. During a routine compliance inspection conducted on August 1, 2012, BLM identified two instrumentation boreholes on these two existing drill sites. After drilling the approved holes, CRI left the metal casing in the ground to be used for groundwater monitoring. These instrumentation boreholes were not proposed or authorized under the notice and in order to avoid a noncompliance order CRI submitted an amended notice and occupancy request on October 25, 2012. This NEPA document satisfies the requirements of the occupancy regulations at 43 CFR 3715.