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Ray and everyone,
 
I am taking B here shortly but I have a lingering question about the slope steepness ratio method.  Norman Booth is writing it horizontal first, verical second 4:1(Basic Elements of Landscape Architectural Design, page 31).  Thomas Russ is writing it in reverse 1:4 (Site Planning and Design, Page 125) Is there a reason why they are different?
 
Thanks,
Tad