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Pond 004. This pond is located below the Ps portal, across an existing small drainageway. The drainage will be re-routed around the pond. The existing drainage has eroded the soils in the area, forming a relatively steep, incised channel with columnar type structures. Visual observation of the structures indicates the columns form beneath a flat cobble or boulder which reduces erosion in the localized area. Erosion proceeds down below the cobble or boulder leaving a near vertical column in place. At the time of our observations the drainage was dry. The soils appeared to be cemented. We believe the vertical channel walls and columnar structures are due to cementation of the soil and not due to a loess (or collapse prone) soil condition. Pond 006. This pond is located below the proposed P3 temporary overburden stockpile in a mildly sloping, colluvial soil area, located below a very small drainage. At the time of our observations, the area was covered with native grasses. Pond 010. This pond is located near the coal load-out area. The pond is located near the Lorencito Canyon drainage in a very mildly sloping area. The soils in the area are alluvial in nature. • Pond 011. This pond is located near the P1/P2 Portal and is adjacent to the Lorencito Canyon drainage. The area of the proposed pond is mildly sloping downward toward the drainageway. The soils are alluvial in nature but finer grained than those found at the raw coal load-out (Pond 010), likely due to the location further from the drainageway. Pond 012. This pond is located near the proposed Pi/P2 overburden stockpile. This area is adjacent to the Lorencito Canyon drainage in a mildly sloping area. The soils in the lower elevation (closer to the drainage) are alluvial in nature. In the northern and western portion of the pond (nearer the access road) the surficial soils appeared to be clays. In the northern portion of the pond, small eroded channels from a minor tributary to the west exposed clay soils. Pond 013. This pond is located adjacent to the Cow Canyon drainage near the R1/R2 temporary overburden stockpile. This pond is located at a relatively high elevation where the Cow Canyon drainage is not well developed. The area of the pond is located above the. drainage in a moderately sloping area (approximately 10 to 20 percent) and visual observations indicate shallow bedrock would be expected in these areas; this was confirmed by the test pit. LORENCITO COAL COMPANY, LLC SMALL SEDIMENTATION EMBANKMENTS CTLR 26,559 4