Laserfiche WebLink
Sector 3 Beach & Dune Restoration Project Attachment 1 to Chance Order No . 1 <br /> IL Native Beach Sands <br /> Characteristics of "native beach " sand in Sector 3 were assessed via sampling and analysis by (a) <br /> S . E . A , Inc . in 2000 , and (b) Coastal Tech in 2007 . Composite values of the "native beach <br />" <br /> characteristics are summarized in Table 1 . <br /> Table 1. — Native Beach Characteristics <br /> Analyst Mean Carbonate <br /> (Year) grain -size 1 Sorting Fines Gravel Content Munsell Color range <br /> white ( 1 OYR 8 / 1 ) to <br /> (20 0) 0 . 38 mm 1 . 26 9 <2 % 2 % 460%° light gray ( 10 YR <br /> 7 . 5 / 1 ) <br /> Coastal light gray ( 1 OYR 7/2 ) <br /> Tech 0 . 50 mm <br /> 1 . 11 cp ! < 1 % < l % 39 . 6 % to very pale brown <br /> (2007) j ( I OYR 8 /2 , IOYR <br /> 8 /3 , or 10YR 7/3 ) <br /> Note : (a) Fines correspond to that passing the #200 sieve (3 . 759) . <br /> (b) Gravel correspond to that retained on the 44 sieve (-2 . 25 (p) . <br /> Beach sediment sampling by S . E . A . was perform in 2000 prior to the Sector 1 & 2 Beach <br /> restoration Project, which was initially constructed in 2003 . Surface samples were collected by <br /> Coastal Tech in 2007 along shore-normal transects at DEP Monuments R17 , R20 , R23 , R26 , <br /> R29 , R32 , R35 , R38 , R41 , R44 , R47 , R50 and R53 . Along each transect, five samples were <br /> taken at the : ( 1 ) the toe of dune, (2) mid-berm, (3 ) mean high water, (4) mean low water, and (5 ) <br /> - 3 contour . For a complete review of these data, see "Indian River County , Sector 3 Beach and <br /> Dune Restoration Project, Design Document" , Coastal Tech, (January 2008 ) . Physical samples <br /> used to characterize the 2007 Sector 3 Native Beach are located in the Indian River County <br /> Coastal Engineering offices and are available for viewing upon request to the COUNTY . <br /> 1[11 . Borrow Area Material <br /> sefted , , <br /> County, see " Ifidian Rive <br /> , <br /> (Januafy 2008 ) . The fne ... . . ..e of berfew afea sediment is between 0 . 48 Fam ( Sub Afea 2 ) <br /> and 0 . 47 fnFa (Sub Area 3 ) . Both Sub Afeas 2 and 3 have a gr-avel (she ! !) eontent of 0 <br /> Area 2 eentains less than 0 fines (<#200 0 - <br /> , . <br /> Dr-y samples obtained ffofn South Befr-aw Sub Afeas 2 and 3 eer-es were Aatmd to be light gray <br /> 0 <br /> water-) eer-e samples wer-e found to be gr-ay ( I OYR 6,11 ) to ligh <br /> bfewnish gfay ( I OYR 6,12) . Chafaeter-isties E4 potential altefnate upland sand sourees afe yet to <br /> be deten:ained-. <br /> Sand for Proiect construction — via use of upland sand sources - is proposed to be obtained from <br /> two (2) sources : <br /> 1 . Ranch Road Lake Sand Mine <br /> 2 . Fischer 86th Mine <br /> The " in situ" material in the Ranch Road Lake Mine is characterized by fine - grained sand <br /> including layers of well sorted and poorly sorted sand , with an average of 7 . 57 % fines (#200 <br /> Page 16 of 26 <br /> March 16, 2010 <br />