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Worthing Pit Permit#M-1977-526 <br /> Technical Revision#04 <br /> December 19,2014 <br /> TIMING <br /> 1. The initial installation of the groundwater drain was <br /> completed in December 2012 . The drain will be cleaned and <br /> final elevations will be established once the new north <br /> outlet is completed. To be completed by February 28, 2015 . <br /> 2 . Installation is in the process at this time, construction <br /> began on December 12, 2014 . Construction will continue from <br /> west to the east so it is done under dry conditions. The <br /> next step is to install the road crossing culvert and then <br /> begin to relocate the north end of the topsoil pile so the <br /> outlet ditch can be excavated. To be completed by January <br /> 15, 2015 . <br /> 3 . We then propose using the next 6 months after the approval <br /> of this Technical Revision to determine what impacts these <br /> changes are having on off site groundwater elevations . If <br /> after that time, the groundwater is not returning to pre- <br /> mining elevations the south outlet structure will be <br /> installed. To be completed within 60 days of determining <br /> need. <br /> Estimated cost to install each drain approximately $4, 500 . 00, see <br /> work sheet attached. <br />