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Logan Wash Mine Annual Report <br />Permit No.: M- 1977 -424 <br />Sampling of retort mine drainage water and mine water (Outfall 00 1) was conducted semi- <br />annually (May and October 2013) to evaluate retort water quality with time in support of final <br />mine closure. The samples were collected from the retort drainage pipeline inside the Lower <br />Bench Vault. The analytical results for samples collected during the reporting period do not <br />indicate a significant improvement of retort water quality compared to past sampling events (see <br />Table 5). <br />3.3 Research Mine Manometer Monitoring <br />The manometer installed in the Research Mine Vault is monitored and recorded on a weekly basis <br />in the spring months of April and May, or until the peak reading begins to subside; the <br />manometer is monitored at least quarterly at all other times as access allows. If manometer <br />measurements were to indicate a very high (> 36 inches) reading for more than a week's time, the <br />water in the mine can be released and sampled according to the CDPS schedule. The manometer <br />level recorded during 2013 ranged from 0 inches to a high of 10.75 inches. <br />3.4 Evaporation Pond Leak Detection System <br />Monitoring of the Evaporation Pond Leak Detection Vault is conducted by continuous <br />measurement of water pressure (depth) in the vault sump using an installed pressure transducer. <br />On -site monitoring is conducted twice monthly as access conditions allow. Figure 4 shows the <br />pressure transducer water depth results for the period October 2011 to February 2014. During the <br />reporting period, the pressure transducer log indicated that the Leak Detection Vault received <br />water and was automatically pumped down on November 18, 2012. Based on observations of <br />suspended buckets under the three collection pipes, it appeared water had entered the vault <br />through the east drainage pipe. An inspection in January, 2013 showed the Detection Vault sump <br />to be full of water — the automated pump had malfunctioned and had not evacuated the sump. A <br />follow -up visit to repair the pump indicated that the float switch had not switched on; the pump <br />was adjusted and the sump was evacuated of water. In February, 2013, a similar event occurred <br />and the pump had to be adjusted again. In March, 2013, the old pump was replaced, and the solar <br />batteries were re- charged after showing insufficient voltage. The automated pump system is now <br />working correctly. <br />Periodic inspections of the liner has not revealed any new open holes, cuts or cracks near the <br />water line. It should be noted that water occurrences of significant depth have occurred in the <br />vault during the early winter to late winter season. <br />4.0 Reclamation Activities in 2013 <br />Reclamation activities conducted at the Logan Wash Mine in 2013 are discussed in the following <br />sections. <br />4.1 Revegetation Maintenance <br />During the reporting period the irrigation system for planted saplings on the Upper and Lower <br />Mine Dumps was not deployed. It is anticipated that irrigation system will not be used in the <br />future. No other revegetation work was conducted. <br />4.2 Well Abandonment <br />No monitoring wells were abandoned during the reporting period. <br />Western Water & Land, Inc. 6 <br />