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MINING PLAN EXHIBIT D <br /> [Rules&Regs§6.4.4] <br /> CONSTRUCTION MATERIAL PERMIT N2 M 2001-.......... <br /> REGULAR 112 OPERATION <br /> " WEIMER ONE GRAVEL" <br /> Januaary 2001 <br /> [a] Open pit mining operations shall be employed at this site, utilizing wheeled front loaders to <br /> extract the gravel resources and at the same time to load the processing equipment hopper. <br /> Extraction shall be at full depth of the gravel deposit resource, and at full width of the unit being <br /> currently mined, beginning from the previously mined central portion of the permit area and <br /> progressing first to the west, then to the north. <br /> An existing ranch access road serves the south and north boundaries of the current permitted mining <br /> operation. A deeper excavation exists at the easterly end of the permit area, having a re-sloped 2:1 <br /> south-facing headwall. The central mined portion of the excavation has a bench about 10 to 12 feet <br /> higher. Both the north- and south-central perimeters have existing overburden stockpiles. <br /> Processing activities shall be performed in the shallower west-central portion of the former mining <br /> excavation, and products stockpiled in the eastern deeper portion. Mining, when resumed, shall be <br /> extended southerly and westerly from the present excavation. The existing access road from the <br /> county road to the south boundary of the site is approximately 15 feet wide, and shall be used for <br /> operations access in its present orientation and condition without widening nor up-grading. The <br /> majority of site storm water runoff shall drain internally into the excavation. Runoff outfall at the <br /> northeast comer of the site, if any occurs, shall be controlled by filtration dikes of silt fence, straw <br /> bale dikes, or by directing it into the field irrigation system of the Weimer Ranch where it is to be <br /> absorbed into the soil. <br /> No acid, toxic, nor waste products shall be involved in the proposed action. <br /> Crushing, screening, washing, stockpiling, and asphalt-mix batching operations of excavated gravel <br /> resources shall be done in the east and central portions of the site within previously excavated pit <br /> areas. Any borrow material removed as an incidental product shall be taken from stockpiles at the <br /> site's south and west perimeters or from areas to be stripped for gravel mining. No processing of <br /> earth borrow material is necessary at the site. A truck weight scale shall be located convenient to the <br /> access/haul route within the site. There are presently not, and shall not be any shop or maintenance <br /> buildings, adits, ventilation shafts, or other mining structures at the site, aside from the production <br /> equipment. <br /> [b] Topsoil averaging 3 inches depth, together with surface vegetation shall be first stripped from <br /> mining areas and temporarily stockpiled, using wheeled front-loaders or tracked bulldozers, and <br /> placed in stockpiles within and along the south and west borders of the site. Such stockpiles shall be <br /> seeded for vegetative cover stabilization with the specified site re-vegetation seed mix. Overburden <br /> from beneath the topsoil in depths of from six inches to two feet shall then be stripped and disposed <br /> of by back-filling completed steep headwall portions of the worked-out pit excavation. <br /> Excess overburden not needed for such slope reduction shall be placed in a permanent embankment <br /> fill within the depression at the northeast quarter of the site. The top elevation of the embankment <br /> 12 <br />