Section 312IAC10-2-20. "Drainage area" defined

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"Drainage area" means the total land area measured in a horizontal plane and enclosed by a topographic divide from which surface run-off from precipitation normally drains by gravity into a waterway above a specified location. The term includes an area that is ineffective due to karst topography, subsurface drains, or diversions. (Natural Resources Commission; 312 IAC 10-2-20; filed Jul 5, 2001, 9:12 a.m.: 24 IR 3386, eff Jan 1, 2002; readopted filed Jul 21, 2008, 12:00 p.m.: 20080813-IR-312080072RFA; readopted filed Sep 22, 2014, 12:34 p.m.: 20141022-IR-312140065RFA)

                    
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