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1 <br />' grows very little vegetation. Useable materials may be found <br />among these materials, but it is unlikely the quantity will be <br />' very large. A sizeable portion of the material would be useful <br />t primarily for backfill. <br />An area of about 10 to 12 acres to the south of the northern <br />' clay pit was mined for gravel about 15 years ago. It appears that <br />the excavations were quite surficiel. No actual reclamation <br />' appears to have been performed. It appears that Yellow and White <br />' Sweetclovers were planted on the area after it was partially <br />smoothed. Topsoil apparently was not salvaged and replaced. In <br />' this area soil quality and quantity is extremely variable. It is <br />estimated that about 1.5 acres total has a soil comparable to the <br />' excellent soils to the south. About one acre has soil of four <br />' inches or less in depth and may be a better gravel source than <br />soil source. The rest of the area has soils with depths that vary <br />' from 4 to 8 inches with an average of perhaps 6 to 7 inches. This <br />soil is quite gravelly but is probably no worse than much of the <br />' overburden material. <br />' Generally, therefore, this area has a rather limited supply <br />of soil. What soil there is is not especially good, but it is <br />' worth saving primarily because it probably has a rather high <br />nitrogen content even though the grass growth is generally weak. <br />' Many years of clover growth has probably produced a rather high <br />' fertilizer value in this soil. <br />From the standpoint of ecological character, the recreational <br />' motorcycle facility is similar to the area mined for gravel. It <br />is severely disturbed by a wide range of activities and contains <br />1 <br />1 „ <br />