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lowest ponding dike from south end, 6-inch
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second 6-inch ponding dike from south end
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third 6-inch ponding dike from south end
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fourth 6-inch ponding dike from south end
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fifth 6-inch ponding dike (top) from south end
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first (lowest) 3-inch ponding dikes from south end
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second 3-inch ponding dike from south end
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third 3-inch ponding dike from south end
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fourth 3-inch ponding dike from south end