34 BASIN BOUNDARY CONTROL STRUCTURE (S) HGS LAKE ^ OKEECHOBEE L-I L-2 L-6 L-3 L-4 S-8\\ L-5 S-7 Figure 16. Location map of the Everglades Agricultural Area. (Modi- fied from Snyder, et al., 1978). Lake Okeechobee is not coincidence (Figure 16). Before the activities of man altered the tendency of Lake Okeechobee to overflow along its southern edge, silt, clay, and organic colloids were mixed with dead plants to form muck. In this way, the mucks became enriched in the microelements that peat lacks (Stephens, 1974), enchancing the mucks as an agricultural growth medium. BUREAU OF GEOLOGY PRIVATELY BACKPUMPED LANDS STATE OWNED LANDS CANAL LEVEE (L) G3 LIIZ"'