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or Chapter 4 - Best Management Practices for Erosion and Sediment Control <br /> Excavate, if Necessary, for Storage <br /> no .o r_ <br /> IN <br /> 0 - o1JYW 71 <br /> no ad no <br /> on <br /> r l •�-•. j.� ' 0t.L <br /> Congo .:% .4 •Zd+ . J` <br /> and. <br /> r ` <br /> Flow anon <br /> a :« .5an <br /> T + <br /> Pon <br /> T : � Not n. . <br /> W. on <br /> sat <br /> • . . <br /> I— Von <br /> on a <br /> on <br /> on <br /> r . a . <br /> on <br /> :�.. s . <br /> • �• •Y yjqP <br /> 91 �- <br /> i J :,o 9 i , . .� . �., y <br /> Earth Embankinenl <br /> w . J, . , .; �c <br /> on <br /> an <br /> r <br /> Outlet Protection J` <br /> rr 4• <br /> All Slopes 2 : 1 or Flatteronnanr �� ��, — — <br /> TwV Min . <br /> ow Poe .. " 7 <br /> . an 5, Max. a VPertorated Riser <br /> �. `�wy <br /> Welded All Around ..- <br /> tr <br /> Embankment Section Thru Riser <br /> Construction Specifications <br /> 1 . Ikea under embankment shall be cleared , grubbed and stripped of any vegetatior, and root mat. The <br /> pool area shall be. cleared. ' <br /> 2. The fill material for the embankment shall be free o: roots or other woody vegetation as well as cve := <br /> am sized atones, rocks. organic material, or other objectionable mater iaL The ambankment shall ue <br /> comparted guy traversing with agUpmerit while it is being constructed. <br /> 3. Sediment shall be remova d and trap restored to its origlna: dimensions when the sediment has <br /> accunuIatedto 112 the design depth of the trap. Removed sed:.ment shall be deposited in a suitable <br /> :rr area and in such a m. nnerthat it will not erode. <br /> 4 , The structure shall be Inspected after each rain and repairs made as needed. <br /> S . Construction operations shall be carried out i1 such a manner that erosion and watar poIiutian are <br /> minimized. <br /> 6 . 'I•ile Structure shall be removed and area stabilized when the drainage area has been properly stabilized. <br /> 7. All cut and fill slopes shall be 2: 1 orflatter. <br /> 8. All pipe connections shall be watertight. <br /> 9 . At least the Zop 213 of the riser shall be perforated with 112-inch diameter holes spaced a in es <br /> vertically and 10 - 12 irches horizontally. <br /> 10. Fill traatartail around pipe spillway steal be hand compacted in 4-Inch layers . A minimum of two 'root of <br /> hand •compacted backfill shall be placed aver the pipe spillway before crossing it with construction equip - <br /> Plate 4 . 25b Pipe Outlet Sediment Trap <br /> Source : NRCS <br /> 4-71 <br />