Word: turtleback
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Dates: during 1960-1969
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...Turtleback Grading...
...addition, the field will be regraded turtleback" pattern, which calls for a slight rise in the center, gradually away on all sides. The 18 inch parently doesn't bother the football team, but greatly aids in field maintenance. Rainwater which collects on tarp can run off to the sides instead of collecting in the middle...