B B' 20 19 18 17 IK -GROUND ELEV. 1912 (ORIGINAL CANAL SURVEYS) 16 GROUND ELEV 1940 13 ESTIMATED GROUND ELEV. 1970 12 - S ROCK 0 .. ESTIMATED GROUND ELEV. 2000 9 IROCK0 0 8 > <7 MILES _- 5 0 15 20 25 30 Figure 19. Profile B-B' across the lower Everglades Agricultural Area showing the original surface elevation in 1912 and the ground elevation in 1940, from topographical surveys. Profiles for the years 1970 and 2000 are estimated. (Modified from Stephens and Johnson, 1951). hi 3 I 2 0 WMLES 0 5 10 15 20 25 30 Figure 19. Profile B-B' across the lower Everglades Agricultural Area showing the original surface elevation in 1912 and the ground elevation in 1940, from topographical surveys. Profiles for the years 1970 and 2000 are estimated. (Modified from Stephens and Johnson, 1951).