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DRAWING 4 , <br /> { ` o.N <br /> c p <br /> Figure 14.—Construction plans <br /> for a single-fence rock <br /> 9 check dam. <br /> e A, Section of the dam <br /> h parallel to the center- <br /> f h line of the gully. <br /> 8, Section of the dam at <br /> the cross section of the <br /> gully. a = original gully <br /> B bottom; b = original <br /> gully cross section; c <br /> = spillway; d = crest <br /> of freeboard; e = exca- <br /> vation for key; f = ex- <br /> cavation for apron; g = <br /> b �° end sill; h = steel <br /> fencepost; k = guys; <br /> d c d j = rebar, 13 mm in <br /> diameter. <br /> e <br /> h <br />