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trbance Category Inventory Land Category acres land bonded (Bonded Boundary) 214.82 ~Ily disturbed in Bonded Boundary 1 and processing areas plus any stage gat has not been released from bond.) 155.35 it undisturbed (Line 1 minus Line 2) 59.47 ntained in roads (only includes roads after reclamation) 0 eded but not released from bond 59.93 and (Line 4 plus Line 5) 59.93 ed in Land Board disturbance category value) 150 bance allowed in Land Board Cation (Line 7 minus Line 6) 90.07 ler of Line 3 or Line 8 59.47 __ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ __ . _ _ UNTERED: No lowland, stream channel sand was mined. Upland sand was all that was mined in the last yeaz. The deposits excavated were consistent with past deposits. The sand occurs in layers exhibiting a rather variable texture. (See photos at the end of this report.) Color also vanes from very light buff to a dark reddish yellow in a few seams. Layer thicknesses vary considerably, but generally are less than a few inches thick. In some azeas the sand contains remains of organic materials that stains the sand to a reddish color, but the organic material is actually a very dark brown to black and appears to be a low grade lignite. This appears to indicate periods when the stream channel was well vegetated. Boundaries between these darker layers and adjacent layers aze usually quite abrupt which could indicate a change in local climate or a shift in the channel. Most likely it is the latter. Some layers contain fairly coazse sand with adjacent layers being fine. In some azeas, thin clay seams also occur and these often occur as small, lens-like seams. In some locations, the sand and clay blend tends to have a color gradation with the upper sand darker and deeper sand gradually lighter. These aze probably paleosoils. Once in a while, large pieces of petrified wood are encountered and these are often associated with coazse sands. This probably indicates periods when erosion rates, most likely from the south, were quite high. Cleazly these pieces of petrified wood did not form at this location. In general, finer sands aze found lower on the hillsides with the more coazse and variable sands occurring towazd the higher elevations. Presumably the hilltop sands aze older. Sand there tends to have a more level bedding plane while sands lower on the hillsides tends to be somewhat sloped at an angle that dips slightly to the west. It appears the finer sands were deposited on the sides of hills that formed a core. These sands are mostly aeolian while other sands are mostly alluvial. Unfortunately, it is difficult to determine whether this sequence of deposition is real or an illusion. Status report for 2006 (July 15, 2006) Page 3 of 13