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View Looking Upstream <br /> 18" (0.5m) <br /> I — A <br /> 1,I�� 12" (150mm) <br /> ,II I I H I ili II <br /> /\ \ '°'''foo a°O o a 00 lint, /< /,/,,//i <br /> \ \ � ' ' o oo /\ ., <br /> //�//, /// °o 0..c. C� 0 O 0o O �j..//// 24 (0.6m) <br /> NOTE: °o :!�S),;:-:62;:c)a �0° i <br /> Key stone into channel banks and \/\/\/\/\/ <br /> extend it beyond the abutments a \\/ � '\\ /, <br /> minimum of 18" (0.5m)to prevent <br /> —A <br /> flow around dam. <br /> Section A - A <br /> FLOW } __ <br /> 24" (0.6m) o,o°' �..o <br /> o0�4oc�� % o O <br /> \�/\// / \ \ d°�O/a\ <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 /> _••// ff-° '=C70°5',-°,6'.0-67., � POINT'A' POINT'B' <br /> \/\/\/\ \ .\ <br /> /'`/\\/\\/ \\/\\/�/\\/�/\///`//'//.\//\ \\", ''%/,\ <br /> NOT TO SCALE <br /> Figure 4.13–Check Dams <br /> February 2005 Volume ll– Construction Stormwater Pollution Prevention 4-77 <br />