was successfully and efficiently accomplished without the use of a 

 retaining dike, and the use of such dikes in future construction 

 of artificial beaches is considered inadvisable. 



In order to provide continuous drainage for surface run-off, 

 depressions were left across the beach at the locations of outfalls and 

 a stockpile of material left adjacent thereto for backfill. The placing 

 and backfilling of the drainage outfall pipe followed the hydraulic 

 fill as closely as practicable. Draglines were employed to transfer 

 the surplus material from the stockpile, across the sea wall, for 

 backfill purposes and after all other work was finished the surface of 

 the beach was dressed to design cross section by bulldozer. 



Volume of sand required for the hydraulic beach fill was slightly 

 less than 6,000,000 cubic yards. Contract unit prices for dredging 

 were 22.ii30 for the section west of Gulfport and 2U.98^ between Gulf- 

 port and Biloxi. About 170,000 cubic yards were reqiiired to replace 

 backfill which had seeped from the rear of the sea wall. Recon- 

 struction of the drainage system involved laying of 10U,370 linear 

 feet of concrete sewer pipe of diameters from 8 to li2 inches, con- 

 struction of Ii06 junction boxes and manholes, driving 29,600 linear 

 feet of concrete sheet piling for the larger outfalls, and miscellaneous 

 appurtenant works. The final costs of the various features of the 

 project are summarized as follows: 



Structural repairs by gunite process - - - - — — »201,OU6 



Hydraulic fill (5,985,000 cu. yds.) - l,iill,671 



Reconstruction of drainage system --------- 1,109,909 



Backfill (169,000 cu. yds.) m2,007 



Subtotal, construction 2,86U,633 



Preparation of Plans and Specifications 83,lli7 



Engineering and Inspection on Construction - UU,630 



Government costs 1 



Supervision and inspection ---------- 6,5ii5 



General overhead 2,825 



Subtotal - Engineering, supervision, overhead, etc 137,lit7 

 GRAND TOTAL COST OF PROJECT $3,001,780 



Detail plans and specifications for the project were drawn up by 

 the Harrison County Engineering Department and submitted to the Corps 

 of Engineers for review and approval prior to initiation of the work, 

 in accordance with the terms of the Federal River & Harbor Act 



