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<br />'. <br />i <br /> <br />V.."'. <br />J' <br /> <br />'- <br /> <br />8-19. Fill materials. 11aterial use in the levee sections is shown on <br />typical levee sections, plate 18. COwpacted fill will be used to provide <br />maximum protection thru a urban area. Fill materials are described in the <br />follmving subparagraphs. <br /> <br />a. Random fill. Random fill will be fine grained and/or granular <br />material from the borrow areas and suitable fill materials from required <br />excavation. Subsurface investigations in the borrow areas indicated that all <br />material in the areas, after shallm, stripping to remove vegetation and <br />topsoil, will be suitable for random fill. Thickness of layers before com- <br />paction will not be more than 9 inches for tamping roller or more than 12 <br />inches for rubber-tired roller. Moisture content of random fill during com- <br />paction will be between 2 percent wet to 2 percent dry of optimum. Eight <br />complete passes of tamping or 4 complete passes of 4ubber-tired roller will <br />be required for each lift of random fill. A ~inimum of 95 percent standard <br />density is required in the random fill sect~on. TIle more impervious random <br />fill will be placed riverward in order that permeability.will.increase <br />toward the lands ide sloDe. Total random fill quantity required is 1,366 ,GOO <br />cubic yards of which 219,000 cubic yards will be used for the north levee <br />and 1,147,000 cubic yards will be used for the south levee. <br /> <br />b. Uncompacted fill. Uncompacted fill is required to load the <br />thin clay layers between stations 386+00 to 463+00 on the south levee. Un- <br />compacted fill will be material which would be suitable for random fill. <br />Required excavation of the drainage ditch in the uncompacted fill area will <br />provide adequate quantities of material. Uncompacted fill will be placed <br />in layers not exceeding 24 inches in thickness. Material may be placed at <br />natural moisture content and compaction other than that from haul equipment <br />will not be required. Surfaces of uncompacted fill will be sloped to drain. <br />About 25,700 cubic yards of uncompacted fill will be required. <br /> <br /> <br />c. Required waste fill. Fill is required at station 72+00 to <br />station E2tOO to prevent dead otorage and ponding of interior drainage waters. <br />As quality or density of fill materials in the above areas is not important, <br />fill is designated as required waste fill. The required waste fill will be <br />placed in layers not exceeding 24 inches in thickness. Compaction other <br />than from haul equipment will not be required. Surfaces of required waste <br />fill will be sloped to drain. About 10,800 cubic yards are needed for the <br />required waste fill area. Approximately l7~ ,000 cubic yards of ,mste fill <br />will be available from borrow areas and requ~red exca\ution. Kemaining <br />waste fill would be deposited upstream or dmmstream of the channelized reaches <br />of the river channel or redeposited in the excavated portions of the borrml <br />areas. <br /> <br />d. Processed drain material. A total of approximately 14,000 <br />cubic yards of processed urain material will be required for lanuward toe <br />protection. Processed drain material viII be sand and gravel, processed <br />or ir.lported having the gradation shmm on plate 33. Concrete aggregate sources <br />listed in para:;raph 3-1ge are suitable sources for drain material. <br /> <br />24 <br />