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View Looking llpstrearr� <br />`//;//��/��� ' - °� oo°� <br />NOTE: <br />Key stone into channel banks and <br />extend it beyond the abutments a <br />minimum of 18" (0.5m) to prevent <br />flow around dam. <br />Section A - A <br />FI nini � <br />18" (0.5m) — <br />� ' <br />� 12" (150mm) <br />I <br />� o�o ��e�a C�O � C <br />114-- nC� ° c� lno�2�°0� <br />� � %���%� �/ <br />24" (0.6m) <br />— �- <br />�-- — _ _ 8' (2.4m) - — -- <br />Spacing Between Check Dams <br />�L' = the distance such that points �A' and <br />'B' are of equal elevation. <br />-- -- -- -�, _ _ <br />o�_ o I, <br />��°�o��a o��� o � � <br />�a- � <br />m�6������000 ������..,�o <br />oo�'��=���> ���� �� POINT �A' <br />% // /. / ,. °?o��� '•� --- -- -- � <br />\. \ \ \ \ Qo� `� <br />�\�/i\�/i\�/i\�/�\�/�\�/i �/i �/i� /i�. i� i� � . ����� aa <br />�'���%��%��%\�/���/�\�%���!`��' ��/ <br />Figure 4.13 — Check Dams <br />POINT �B' <br />����;ii;ii; <br />NOT TO SCALE <br />February 2005 Volume ll — Construction Stormwater Po/lution Prevention 4-77 <br />