1986-11-01_PERMIT FILE - C1981008A (4)

Home Browse Search

C-008-81 , included a portion of Mining Area 3 (see Exhibit 12-1, Operations Plan, and Exhibit 9-1, Soil Types) . Second, the Shop Area soil survey addition, completed in November, 1980, is located in the immediate vicinity of the Nucla Mine office within the E 1/2 SW 1/4 SE 1/4, Section 25 and W 1/2 SE 1/4 SE 1/4 of Section 25, T47h, R16W. This survey information, presented as Attachment 9-2C to Tab 9, SMP C-008-81 , included all of Mining Areas 4 and 5 (see Exhibit 12-1 , Operations Plan, and Exhibit 9-1, Soil Types) . INTERPRETIVE STUDY OF THE SCRAPER PIT AREA Soils within the scraper pit area (Vining Areas 2 and 3 as shown on Exhibit 12-1 , Operations Plan) at Nucla Mine are diverse and highly variable. The following categories of map units were anticipated prior to completing the survey for Areas 2 and 3: 1. Native undisturbed soils 2. Partially disturbed (A and B horizons removed or replaced) native soils 3. Topsoiled regraded spoils 4. Subsoiled regraded spoils 5. Nontopsoiled regraded spoils. An office photo interpretive study was initially completed for Areas 2 and 3 prior to the field survey to delineate and differentiate undisturbed soils from reclaimed land. This was accomplished by utilizing a magnification stereoscope, 1" = 400' and 1" = 1000' scale black and white aerial photographs dated April 19, 1986, a 1" = 400' scale topographic map dated February, 1984, the 1975 SCS soils map (SMP 75-36, Exhibit C-5, Soils Map) , the 1980 East Area Soils Map (SMP C-008-81 , Exhibit 9-1, Soil Types) , and the monthly 1" = 400' scale 1983 reclamation progress maps. Following the photo interpretive study, preliminary map units were delineated on the 1" = 400' aerial photo base map and proposed soil sample locations were strategically placed to confirm these soil map unit boundaries. 9-4-6 Pevisec 11/01/S6