source material in the borrow area, exploratory borings were taken to 

 a depth of about 20 feet below mean sea level at intervals of 1,000 

 feet. Except for occasional isolated lenses of clay, all material in 

 the borrow area west of i^eauvoir, about midway between Gulfport and 

 Biloxi, was determined by sampling to be practically pure sand. 

 Opposite Beauvoir, clay was found at a depth of 18 feet and from there 

 eastward there was a continued gradual rise of the clay strata, which 

 reached the surface opposite Biloxi. Although the dredges avoided 

 clay areas as much as possible, its predominance opposite Biloxi is 

 manifested in the appearance of the finished beach in that area. 

 Median diameter of sand in the foreshore slope of the finished beach 

 was about 0.27 millimeter. Gradation of representative samples of 

 material in place is indicated in the f o]J.owing tabulation. Sample 

 No, 1 was taken when material was first pumped on the beach and Sample 

 No, 2 was taken from the foreshore slope about two months later. 



Sieve No. 



: Size 

 1 Opening 

 (mm) 



t Sample No. 1 

 : Percent 

 I Retained 



: Sample No. 2 

 I Percent 

 t Retained 



10 



t 2.00 



: 0.0 



! 0.0 



20 



O.eiiO 



; 0.6 



: O.U 



i;0 



0,I;20 



:» 9.9 



: 6.3 



60 , 



0.250 



: 51.0 



56.U 



100 ! 



0.1)49 



: 89.5 



95.U 



200 s 



0.07U 



J 98.0 



100,0 



In placing the material, an outer retaining dike with its crest 

 at an elevation of about 2 feet above mean sea level was first deposit- 

 ed for a distance of about 1,000 feet parallel to and slightly less 

 than 300 feet from the sea wall. The intervening space between the 

 retaining dike and the wall was then filled with sufficient material 

 to bring the beach to design grade and cross section, plus an excess to 

 be used to fill slack areas and to supply backfill for the rear of the 

 sea wall. This process was then repeated for the next 1,000 feet and 

 so on throughout the job. It was subsequently found, however, that use 

 of the retaining dike in beach construction was unnecessary. Actually, 

 the dike had prevented the run-off of undesirable fine material. 

 Restoration of the beach along the Biloxi waterfront, recently ccMipleted, 



