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bench configuration can be achieved. To reduce shock from blasting, benches will only be about <br />20 feet high rather than the originally expected 30 foot benches. Bench steps will be 30 to 40 feet <br />wide which is excellent for the reestablishment of vegetation. This allows for a large unit growth <br />area. Using only 20 foot high benches means that more of the bench wall can be obscured which <br />will improve visual characteristics with subsequent tree growth easily obscuring whatever <br />remaining wall results after backfilling benches. Therefore, it is desired that the mining direction <br />for the northern portions of Phase AP be reversed to a north to south direction. <br />Extent of Affected Land: Investigations over the last few years has found that land east of the <br />old north to south road contains too much sandstone to make mining economical. In a few places, <br />limestone does extend a short distance east of the road, but it then dives under the sandstone <br />which thickens rapidly. Although the affected land boundary is well east of the road, it is unlikely <br />that mining will extend that far to the east. Most if not all of the future disturbance will not <br />extend far beyond the eastern edge of the existing road corridor. <br />Two Lane Road: To facilitate access to the north and for haulage, a two lane road will be <br />constructed within the existing north-south road corridor. This will greatly limit disturbance of <br />land east of the road which is visually sensitive. As mining progresses southward the existing <br />road will be eliminated unless Cedar Heights wishes to utilize the road as a "backdoor" access. <br />Although it is never used for that, it is currently understood that the road is one emergency <br />escape route in case of wildfire. <br />Initial and Subsequent Sediment Control: During the initial stages of opening the mining on <br />the north end, the vegetation in the drainage channel should control sediment quite well. But as <br />extra insurance, silt fencing will be placed at intervals along the drainage. In the early summer of <br />2009 the sediment basin will be established so it will be functioning by July when often the very <br />heavy rains can come. It is not likely that existing vegetation, even with silt fencing, would <br />control sediment sufficiently during heavy rains in the later summer monsoon season. Once the <br />sediment basin is installed, it will be maintained so as to keep sufficient capacity to handle <br />sediment loads. As the mining expands southward the sediment basin will need to be enlarged as <br />described in the permit because the amount of land that will create sediment discharge will grow. <br />However, as reclamation is done behind the mining, the sediment discharge will achieve a fairly <br />stable level. This is another benefit from reversing the mining direction. In effect, the stable level <br />of sediment discharge will be at a somewhat lower level than would occur if mining proceeded <br />from south to north. <br />Maps: Included with this revision are two maps. One map shows the entire site and the <br />surrounding land with a legend. The other map is an enlargement of the specific primary permit <br />area shown on the first map. The second map provides a bit better visibility of the features within <br />the actual permit area. <br />Technical Revision 02/12/09 Snyder Quarry Page 2 of 3