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Florida Erosion and Sediment Control Inspectors Manual ` <br /> Excavate, if Necessary, for Storage <br /> Flow <br /> ,. yam. _ ![y. ! / � - _ • <br /> ;��-,: ., �, � •rv+yt�y _ it //�,, . <br /> �~ j4 5 <br /> Earth Embankment <br /> Outlet Protection ' r <br /> i <br /> 4' <br /> All Slopes 2:1 or Flatter r � _ <br /> 1; 1 '-6' Min. <br /> 5' Max. ' . Perforated Riser <br /> Welded All Around <br /> Embankment SectionThru Riser <br /> Construction Specifications <br /> 1 . Area under embankment shall be cleared, grubbed and stripped of any vegetation and root mat. The <br /> pool area shall be cleared. <br /> 2. The fill material for the embankment shall be free of roots or other woody vegetation as well as over- y <br /> sized stones, rocks, organic material, or other objectionable material. The embankment shall be <br /> compacted by traversing with equipment while it is being constructed. <br /> 3. Sediment shall be removed and trap restored to its original dimensions when the sediment has <br /> accumulated to 1 /2 the design depth of the trap. Removed sediment shall be deposited in a suitable <br /> area and in such a manner that it will not erode. <br /> 4. The structure shall be Inspected after each rain and repairs made as needed. <br /> 5. Construction operations shall be carried out in such a manner that erosion and water pollution are <br /> minimized. <br /> 6. Tile structure shall be removed and area stabilized when the drainage area has been property stabilized. <br /> 7. All cut and fill slopes shall be 2:1 or flatter. <br /> 8. All pipe connections shall be watertight. <br /> 9. At least the top 2/3 of the riser shall be perforated with 1 /2-inch diameter holes spaced 8 inches ■ <br /> vertically and 10 - 12 inches horizontally. <br /> 10. Fill matertail around pipe spillway shall be hand compacted in 4-Inch layers. A minimum of two feet of <br /> hand-compacted backfill shall be placed over the pipe spillway before crossing it with construction equip- <br /> ment. <br /> ■ <br /> Plate 4.25b Pipe Outlet Sediment Trap <br /> Source: NRCS ■ <br /> 4-70 <br /> ■ <br />