Laserfiche WebLink
2015 Annual Report <br />Martin Marietta <br />Parkdale Project <br />Permit # M-1997-054 <br />Page 4 of 5 <br />112C ANNUAL RPORT SUPPLEMENTAL WRITTEN NARRATIVE <br />Mining Activity <br />Sandstone Mining Area <br />No mining activity was conducted in the sandstone mining portion of the quarry in 2015. <br />Granite Mining Area <br />Exploratory drilling in anticipation of production mining was conducted in the granite quarry area of the site in 2015. <br />Alluvial Mining Area <br />The depth of mining on the alluvial deposit portion of the site was controlled by and limited to the top of ground water <br />prior to the 2008 reclamation permit amendment. The 2008 Reclamation Permit Amendment allowed for mining of <br />alluvial material to bedrock. Most of the post -2008 mining activity has focused on removal of alluvial material from <br />areas previously mined to the top of ground water. As a result, there has been limited new surface disturbance. <br />Mining activity in 2015 included continued mining of residual material above bedrock along the western mining limit. <br />Mining was also continued along the southern mining limit in the area south of the plant area. Mining continued to <br />be conducted with minimal interference from groundwater infiltration into the pit. Mining will continue in the area <br />south of the plant area during 2016. <br />Sales volume in 2015 was approximately the same as those in 2014, well below the peak sales years of 2006 and <br />2007, and below the anticipated sales volumes projected in the 2008 Reclamation Permit Amendment documents <br />finalized in 2008. Consequentially, production volumes since 2008 have also below permitted and projected volumes. <br />Groundwater <br />Due to the unprecedented rains during the spring, and unusually high flows in Tallahassee Creek, to the north of the <br />pit, groundwater levels were higher than those experienced since 2009. The unusually high water levels in <br />Tallahassee Creek resulted in water moving through the There is some exposed surface water impounded in fresh <br />water and settling ponds excavated within the permitted alluvial mining limit. The fresh water and settling ponds are <br />actively used to support washed aggregate processing. The water in the settling ponds is primarily reclaimed wash <br />water. A substitute water supply plan is in place to account for the limited groundwater consumption that takes place <br />on the site. 158,500,300 gallons of excess water was discharged in 2015. <br />Overburden and Topsoil Stockpiles <br />The slopes on the topsoil and overburden stockpiles from 2011 and 2012 continue to be maintained, and vegetation <br />continues to spread, in spite of the arid conditions that prevail on the site. Some additional material was added to <br />the stockpiles in 2015. Sloping and stabilization of the additional material is performed as the material is placed in <br />order to minimize erosion from the periodic rains in the area. <br />Reclamation <br />Cleanup and leveling of the pit floor was started in 2014 and stabilization and sloping of the western perimeter started <br />in 2013. However, due to the unusually high groundwater levels in the area, minimal leveling of the pit floor and <br />sloping of the walls could be conducted in 2015. We anticipate that leveling of the pit floor and sloping of the walls <br />will continue during 2016. This site is permitted as a water storage vessel, so final construction of the reclamation <br />