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Figure 11-4.2.7 Rock Check Dam <br />View Looking Upstream <br />Note: <br />Key stone into channel banks and extend it <br />beyond the abutments a minimum of 18" <br />(0.5m) to prevent flow around dam. <br />-A 18„ <br />12" <br />050mm) <br />M <br />i <br />24" (0.6m) <br />O ,h <br />8' <br />Spacing Between Check Dams <br />U= the distance such that points <br />'A' and 'B' are of equal elevation. <br />NOT TO SCALE I <br />Figure II-4.2.7 <br />Rock Check Dam <br />D EPA RT M E N�T+O�/F Revised July 2015 <br />E C O L O V I Please see http.1Avww.ecy.wa.gov/copyright.htm/for copyright notice including permissions, <br />State of Washington limitation of liability, and disclaimer. <br />2014 Stonnwater Management Manual for Western Washington <br />Volume 11 - Chapter 4 - Page 354 <br />