2017-04-11_REPORT - M1977424 - Laserfiche WebLink

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Logan Wash Mine Annual Report Permit No. M-1977-424 within the permit area with an actual disturbance of 113.6 acres.This acreage has been revised to account for subsequent new disturbance and incorporation of the Evaporation Pond (Amendment No. 1) into the permit. See Table 1.0 for a summary of acreage reclamation status. Annual reports have shown since at least 1985 that Area 23, Evaporation Pond and Pipeline, was initially a 14.8-acre disturbance. The 1985 annual report shows that approximately 5.1 acres of this acreage was reclaimed prior to the report's published date in spring 1986. Table 1.0 shows the Evaporation Pond and Pipeline acreage as Area 23. Table 1.0 also shows the disturbed acreage for the Soil Barrow Area that was added in 2005. Based on this total acreage and reclamation performed,Table 1.0 shows that the estimated actual disturbed acreage was approximately 135.2 acres and of this amount, 61.7 acres are not to be reclaimed because Logan Wash Road is to remain in place for other users and a parcel of land was transferred to Chevron. This results in an approximate total of 73.5 acres requiring reclamation. Historical documentation appears incomplete on the warrantee release of all reclamation areas at the mine. However, site inspections show that some original reclamation areas would readily qualify for warranty release and, in fact, may have been released. Documented releases are discussed in Section 2.4. In a DRMS warrantee release letter of January, 2006, DRMS stated that areas remaining as not reclaimed and not released are Areas 1, 2, 3, 4, 10, portions of Area 13, and the Soil Barrow Area. DRMS stated that the total adjusted remaining acreage for roads was estimated to be 10 acres, including road fill sidecast material areas; and that the total remaining acreage requiring reclamation (affected area)was 38.25 acres, including the Evaporation Pond. Calculations for this report indicate a slightly greater unreclaimed acreage of 42.4 acres as shown in the following table. Area Acreage Area to be Requested for Release in 2017 1 —Mine Dump 13.36 Yes 2—Upper Mine Bench 0.74 Yes 3 —Lower Mine Bench 2.10 No 4—Research Mine Bench 4.26 Yes 10—Helo Pad 0.24 Yes Portions of Area 13* 10.9 Portions Soil Barrow Area 0.65 Yes Evaporation Pond 10.2 No Total 42.4 *See Section 2.2 Figures 4A and 4B illustrate the current reclamation status of disturbed areas and roads. The reclamation status of previously disturbed areas is discussed below. 2.1 Mine Areas Other than roads and the Evaporation Pond and associated retort pipeline,the Lower Bench is the only remaining mine area(Area 1)that is not reclaimed. This area consists of 2.1 acres and is currently being used as mine access to monitor hydrological stations and general revegetation progress at other parts of the mine property. Western Water & Land, Inc. 2