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The amount of land in each category will be monitored periodically and will be reported <br />in the annual report. Thus both the permittee and the Division can be assured the <br />limitations are not being exceeded. In the event the acreage limitations need to be <br />exceeded then the limitations will be increased and addition bond provided through the <br />technical revision process. <br />Timetable: <br />Phasine: The operation does not have a discrete phasing arrangement because of the use <br />of disturbance categories to define the limits to the area that can be worked at any on <br />time. Essentially, the pit is operated on a continuous basis within the defined limits. <br />Directional Trend: In the past the operation worked from east to west along the northern <br />ridge of the gravel. Through a drilling program the current configuration has been <br />defined. At present the operation has turned and begun a north to south operation. This <br />direction will continue down the ridge until the operation daylights at the drainage to the <br />south. Once this occurs the mining direction will continue to the west until the permit <br />boundary is reached. <br />Nature, Depth, and Thickness of Gravel Deposit: The gravels in this area tend to be <br />extremely spotty and exhibit configurations that indicate old stream channels and <br />deposition on an old erosion surface. The material itself tends to be extremely variable <br />over even short distances. The valleys in the current topography tend to be associated <br />with more sandy material while the ridges often represent gravel seams. However, this <br />pattern is not always consistent and occasionally sand is found on hill tops and gravel in <br />the valley bottoms. <br />The material to be mined on this site ranges in thickness from a few feet to many tens of <br />feet. Well logs in this area show occasional pockets of sand and gravel layering that can <br />be well over 100 feet thick. In general, the depth of mining on this site will be restricted <br />to about a maximum of 40 to 50 feet with an average of 30 feet. <br />Interspersed with the gravel and sand layers are clay seams that can be a foot or more <br />thick. These apparently represent altered during depositional stages of the erosion cycle <br />that produced the deposits. These clay seams are important to the overall quality of the <br />material on this site. The El Paso County Road specifications, allows for the clay in the <br />sand and gravel blend to provide a binder when the material is applied to the roads. <br />