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Homestake 2014 Geotechnical Observations <br />Pitch Reclamation Project Indian and Tie Camp Waste Rock Dumps <br />Table 1: Monthly Water Level Readings in Rock Dump Piezometers <br />Piezometer No. <br />IC10630 <br />IC10600 <br />IC10525 <br />IC10370R* <br />IC10360 <br />IC10300R* <br />TC10375 <br />Collar Elevation <br />10631.5 <br />10603.8 <br />10523.6 <br />10380.5 <br />10373.4 <br />10297.8 <br />10373.0 <br />01/21/14 <br />202.8 <br />252.8 <br />229.1 <br />205.3 <br />224.1 <br />191.0 <br />169.8 <br />02/13/14 <br />202.7 <br />252.6 <br />229.1 <br />206.4 <br />226.0 <br />191.5 <br />170.1 <br />03/05/14 <br />202.8 <br />252.6 <br />229.2 <br />206.4 <br />226.8 <br />192.2 <br />170.2 <br />04/15/14 <br />200.1 <br />249.3 <br />226.6 <br />206.4 <br />225.5 <br />193.5 <br />161.1 <br />05/08/14 <br />195.3 <br />248.4 <br />222.5 <br />195.3 <br />221.7 <br />178.7 <br />162.2 <br />06/02/14 <br />195.8 <br />241.0 <br />220.2 <br />195.0 <br />219.1 <br />175.6 <br />167.7 <br />07/14/14 <br />196.3 <br />243.3 <br />221.3 <br />195.6 <br />220.8 <br />187.0 <br />167.7 <br />08/02/14 <br />197.8 <br />244.3 <br />223.5 <br />195.9 <br />221.8 <br />187.6 <br />167.8 <br />09/15/14 <br />198.3 <br />246.8 <br />225.2 <br />196.7 <br />223.6 <br />187.9 <br />168.2 <br />10/08/14 <br />199.2 <br />248.0 <br />226.8 <br />197.0 <br />224.5 <br />187.8 <br />168.4 <br />11/12/14 <br />201.3 <br />249.9 <br />227.2 <br />198.1 <br />224.5 <br />188.2 <br />168.6 <br />12/06/14 <br />201.3 <br />249.9 <br />227.3 <br />198.1 <br />224.5 <br />188.2 <br />168.6 <br />Average depth <br />from ground surface <br />199.5 <br />248.2 <br />225.6 <br />199.7 <br />223.6 <br />187.4 <br />167.5 <br />2014 Maximum <br />Differential feet <br />7.5 <br />11.8 <br />9.0 <br />11.4 <br />7.7 <br />17.9 <br />9.1 <br />Notes: <br />Depth recorded in feet below ground surface (bgs) <br />* Piezometers 10370 and 10300 were replaced with piezometers 10370R and 1030OR in August 2011 <br />(Described in Pitch Reclamation Project - Piezometer Replacement Field Report, ARCADIS -US, Inc., October <br />21, 2011) <br />Homestake Pitch Reclamation Project Page 5 <br />2014 Annual Geotechnical Report December 23, 2014 <br />M- 1977 -004HR 2014AnnualGeotechnical Repo rtText _Final.doc <br />