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Jun,16 03 12:18p Cit~Taylor Lake Village 28132456 p.2 <br />SPILMAN ISLAND DEVELOPMENT <br />Much of Spilman Island is built on old bay bottom. Except for the levees which are generally <br />constructed of dried maintenance material and clay material from dredging new material, the <br />area is soft material dredged from the Houston Ship Channel, in order to develop any portion <br />of Spilman Island, the soft wet material deposited over the years Heads to have the water <br />removed, thus allowing the material to consolidate and improve its strength characteris#ics. <br />Consolidation and moisture removal could be achieved by pre-loading. A reasonable area for <br />pre-loading would be approximately 5 acres in size. Approximately 20 feet of sand would be <br />placed and wick drains installed to allow the water presently trapped in the dredge material to <br />• escape as the sand consolidates the material. A S acre area woutd general be expected to <br />consolidate to an acceptable level over a 1 to 1-1/2 year period. The sand would then be <br />''`moved to a second 5 acre area and the process repeated until whatever total area desired has <br />been consolidated to a useable condition. Sand is the proper material to use to load the area <br />because it is more economical to place and move and does not pose the problems <br />encountered when woiicing with clay in wet conditions. Wortcing on 5 acre areas at 1-1/2 year <br />intervals would yield 20 acres. total for potential development after approximately 6 years. <br />Using 20 feet of sand over 5 acres, would require approximately 205,000 cubic yards of sand. <br />Potential source of sand is dredging from bay area south of 13allester Street and pumping to <br />Spilman Island. <br />A soil boring program would need to be instituted to determine if a source of sand is available <br />and define an area to be used as a source for the sand. Additionally, an extensive <br />• <br />