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Logan Wash Mine Annual Report <br />Permit No.: M-1977-424 <br />For more information regarding the Research Mine portal closure and management of the <br />Research Mine drainage see Technical Revision (TR) No. 4 and TR No. 6 which present <br />significant revisions to Exhibit E, the Reclamation Plan for Logan Wash Mine. <br />3.2 Mine-Water and Retort-Water Discharge <br />Discharge measurements of clean (non-retort) mine-water discharge (Outfalls 001, and 002) and <br />retort-water discharge were conducted on a quarterly basis when possible. These data were <br />collected by OOSI to assess and evaluate mine closure effectiveness and to support operation and <br />maintenance of the evaporation pond. <br />Sampling of retort mine drainage water and mine water (Outfa11001) was conducted in October <br />2007 to evaluate retort water quality and contribute to long-term trend analysis. The samples <br />were collected from the retort drainage pipelines inside the Lower Bench Vault. The analytical <br />results indicated no significant improvement of retort water compared to past sampling events. <br />4.0 Reclamation Activities in 2007 <br />Reclamation activities conducted at the Logan Wash Mine in 2007 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 reemployed. Polyethylene tanks were set in place and piping was installed to <br />collect and store. mine water for irrigation of saplings on mine dump faces. Research Mine <br />discharge water (NPDES Outfa11002) was diverted to polyethylene tanks on the Lower Bench, <br />and L-1 Portal mine discharge water (NPDES Outfall 001) was captured in the Lower Bench <br />Vault through the use of a small polyethylene tank. Maintenance of the plant irrigation system <br />included general repairs or improvements and winterization in the fall. <br />Irrigation of saplings planted on the mine dump faces was conducted periodically in June and <br />July. Repairs were conducted to pumping and other irrigation system components when <br />necessary. <br />In mid-May, reseeding (second seeding) of the Upper Bench Road was conducted followed by <br />mechanical straw mulch spreading and crimping. <br />4.2 Well Abandonment <br />During the reporting period, monitoring Wells LW-102, LW-104, and LW-243, located at outside <br />the mine permit area, were abandoned in accordance with state rules and regulations. At well site <br />LW-243, OOSI also removed old stream gauging materials (corrugated metal pipe). At the <br />request of the land owner, Well LW-103 was not abandoned; well ownership will be transferred <br />to the private land owner. <br />5.0 Maintenance Activities <br />Maintenance activities included periodic inspections of mine roads, portals, mine water drainage <br />systems associated with the retorts and general mine workings, as well as inspection of general <br />Western Water 8~ Land, Inc. 5 <br />