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MESA GRAVELLY • LOOA• 2 to 5 percent slopes,~Glasa ~e Land (Me) This soil is derived from old alluvium consisting mainly of materials veathered from acid igneous and mixed igneous rocks, largely granite and basalt, but includes smaller quantities of material from sand- stone and shale. The alluvial mantle, for the most psrt,l ranges from 5 to 8 feet deep but it is deeper in places. The 8- or 10-inch surface soil in cultivated fields is light brown when dry and brown xhen moist; its organic-matter content ie very low. The subsurface layer is light-brown or pale-brown clay loam containing a considerable amount of cobblestones, rounded pieces of gravel, and chert fragments. Beginning at depths below 12 to 1~ inches the sub- soil is very pale brown to reddish yellow and shoos a considerable amount of white lime splotching. Lime encrustations appear on the lower sides of the pieces of gravel, cobblestones, and stones that make up about 50 percent of the soil mass. In some places the cobbly material is more abundant than the gravelly, but in others smaller cobblestones and gravel are more abundant. In a feu places the sub- soil material is veakly cemented into s semihardpan. Generally, hovever, it is permeable enough to permit the dovnvard grovth of deep-rooted plants. ! Surface runoff is medium, and underdrainage is adequate. The excess of gravel, cobblestones, and stones makes uorlmbility less favor- able than on Mesa clay loam soils. Saline areas occur only in a very fev places bordering shale soils. Soil limitations are classified as severe for sanitary land fill (poor .bank stability, rapid permeability), and sewage lagoons (rapid permeability below 14"). { }-v !~ Gc j M< ~ ~ Mc M Ge ~ \~( He Md ~ He MI M MC u ~ Me l lel 1~ Mc MI ~Mn/~//'~/~ /n/~N~J~1~{~lCT~IJ MI Mc' R< ~ ~ Md Exhibit I (R-1) `~ ~~` (Re: Reply G. 1&2)