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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />page X-2I, Equation X,22 and in definition of symbols following change "H" to <br />"Hd". <br /> <br />page X-22, first paragraph, 2nd line, change "altemtive" to <br />"alternative" , <br /> <br />pages X-37 through X-40, In the last caption line of each figure change "Notes" to <br />"Noted", <br /> <br />Section XI <br /> <br />page XI-2, Delete Figure XI-2 and Insert Table XI-I as explained in the Addendum Section, <br /> <br />TABLE XI..l <br />MINIMUM DESIGN GUIDELINE FOR <br />GROUTED SLOPING BOULDER DROPS <br />FOR GRASS LINED CHANNELS <br /> <br />Design <br />Parameter <br /> <br />Drop Height <br />3ft. or Less <br /> <br />Drop Height <br />Greater than 3ft. <br /> <br />Uniform Rock Size - <br />Minimum Dimension <br /> <br />Minimum Grout - Thickness <br /> <br />1.5 ft. <br />1.0 ft. <br /> <br />2.0 ft. * <br />1.5 ft. <br /> <br />* <br /> <br />May use 1.5 ft. rock and 1.0 ft. grout for upstream normal flow depth less than 3 ft. <br /> <br />Note that the overall drop structure dimensions such as basin length, or basin depression depth <br />are determined by applying water surface profile or specific force calculations, These <br />hydraulic calculations may be simplified to a unit flow basis as described on page X-27, <br /> <br />page XI-3, change equation XI.l to read: <br /> <br />= <br /> <br />ySe <br /> <br />XI-I <br /> <br />2..4 <br />