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Logan Wash Mine Annual Report <br />Perini! No.: M-1977.424 <br />boron, oil and grease, and phenols; and quarterly for TDS, TSS, pH, nitrate, sulfate, fluoride, <br />ammonia, COD, boron, arsenic, copper, lead, oil and grease, and phenols. This monitoring is <br />required when mine-water drainage from Logan Wash mine reaches a flume on the OOSI and <br />BLM property boundary (Outfall 1), and when flow is present in the pipe conveying mine water <br />from the Research Mine (Outfall 2). Sampling was not conducted at Outfall 001 because of no- <br />flow conditions at the designated outfall point. Sampling was also not conducted at Outfall 2 due <br />to no-flow conditions. Flow from Outfall 2 did not occur because mine water in the Research <br />Mine was retained in the mine with a small concrete sack dam constructed in the spring of 2003. <br />Discharge Monitoring Reports were submitted to CDPHE as required. <br />3.2 Mine-Water and Retort-Water Discharge <br />Measurements of clean (non-retort) mine-water discharge and retort-water discharge were <br />conducted on a weekly basis when possible. These data were collected by GSHI to support the <br />evaluation of alternatives for mine water treatment and mine closure. <br />3.3 Field Testing of Passive Water Treatment System <br />In November 2002, GSHI constructed a small passive-water-treatment field-test system (cell) <br />consisting of asulfate-reducing bioreactor {SRB Cell) {see Section 4). Monitoring of this system <br />consisted of weekly measurements of flow, pH, specific conductivity, temperature, oxidation- <br />reduction potential (ORP), and dissolved oxygen. The passive water treatment system sampling <br />program was terminated in the summer of 2003 because of poor results. <br />4.0 Reclamation Activities in 2003 <br />Reclamation activities conducted at the Logan Wash Mine in 2003 included: <br />1. Underground repair of the roof support structures in the L-1 Portal and side drifts (this <br />was conducted to initiate number 2 below). <br />2. Replacement of all retort water drain lines inside the mine, which included trenching and <br />installation of 2-inch diameter HDPE pipe. <br />3. Realignment construction of a new retort drain pipe (2-inch diameter HDPE) to Dry <br />Gulch (old alignment was located down the face of the lower dump). New drain line taps <br />into existing metal pipe line below the surface pipe trellis. <br />4. Realignment construction of new mine water drain (2-inch diameter HDPE) to Dry Gulch <br />(old alignment was located down the face of the lower dump). <br />5. Removal of all highwall rock support structures including bolt plates, banding, and chain <br />link netting. <br />6. Removal and disposal of the Ventilation Shaft Housing, closure of the Ventilation Shaft, <br />and revegetation of the disturbed area. <br />7. Removal and disposal of mine trash and debris from the upper and lower mine dumps. <br />8. Construction and hydroseeding of "micro" terraces on the lower mine dump slope. <br />9. Construction of "pockets" on the upper mine dump slope with partial hydroseeding. <br />10, Partial transplanting of the lower dump "micro" terzaces with native tublings. <br />11, Demolition and disposal ofthe portal canopies associated with the L-1, Daylight, and <br />Research Mine Portals. <br />] 2. Closure of the L-1, Daylight, and Research Mine Portals with 35 foot to 45 foot long <br />earth plugs (with mine bench materials). <br />13. Regrading and contouring of the upper and lower bench areas, and partial regrading of <br />the Research Mine bench. <br />