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2.04.7 Hydrology Description <br />completed in a sandstone water bearing zone located above the B -Seam <br />with a screened interval of 1,120 to 1,140 feet. This sandstone water <br />bearing zone above the B -Seam was identified at wells TC -03 -02 and TC -03- <br />03. <br />The PR -13 mine plan area, west of Terror Creek, has up gradient and down <br />gradient monitoring wells. CWI -58 and CWI -DH -60 are up gradient <br />monitoring wells and 2010 -1 B and 2010 -1 SS are down gradient monitoring <br />wells. See Map 9 for well locations. <br />The down gradient monitoring wells will be mined through during 2015 based <br />on current mine plan timing. Replacement down gradient monitoring wells <br />would need to be installed north of the West Fork of Terror Creek with <br />depths exceeding 1,500 feet. The Operator does not believe it is economical <br />or technically practicable to install replacement down gradient monitoring <br />wells at these depths. The discussion above documents the difficultly and <br />expense of installing deep bedrock monitoring wells. <br />It is highly unlikely the public will use the deep bedrock groundwater located <br />north of the west mine plan area west of Terror Creek. It is simply too <br />expensive to install a domestic or livestock well at such extreme depths. The <br />poorwater quality would also discourage public use. Additionally, the USDA - <br />FS manages the land to the north of the west mine plan area. It is unlikely <br />the USDA -FS would approve the installation of a deep bedrock water well on <br />the land it manages. It is over four miles to the nearest private land owner <br />which further reduces the likelihood of pubic use of the water. The lack of <br />deep bedrock groundwater monitoring data after 2015 is mitigated by the <br />highly unlikely public use of the water. <br />PR-13 2.04 - 32ii 02/13 <br />