combination piers and these plans were placed on file in the field, available for immediate use. Such plans were utilized, not only for some new piers which it was found necessary to construct, but for enlargement of existing piers. The design for all piers was predicated upon at least two usages for experimentation purposes, As in the case of the Biijiri-Rojoa causeway, exceptionally rapid deterioration of all untreated wood in contact with sea water below highest tide, due to the attack of teredo and limnoria led to the requirement that all piles be specified for 16 pounds per cubic foot creosote treatment, and all diagonal bracing, pile caps, and stringers be creosote treatment to & pounds per cubic foot or 3/4 inch penetration by alternate vacum and pressure method, All bored holes in piles and diagonal bracing were thoroughly swabbed with creosote before insertion of halts or pins. Over all piles, 12 inch by 12 inch caps were used; 4 inch by 12 inch stringers were used on the lighter pliers and 4 inch by 16 inch stringers for the major piers which were subject to heavier loading. Port Orford cedar decking wes used for all piers for economy, workability, and wear. Bollards and cleats were firmly bolted to the decks for lashing boats alongside and these were supplemented by the driving of adjacent dolphins for the more important piers. The decision to use timber and pile construction was reached after study of the effect of storm water and currents on Sandstone moles, and after an economic study of different methods, Test piles were driven before materials were ardered and the program accepted. For the Sandstone experiments, solid jetties composed of Navy _ cubicles or other material at hand had been extended out into the lagoon, and shallow draft boats were lashed alongside for loading or unloading. In some cases these moles were repaired and utilized as the shore end of the new piers, the extension to deeper water being of the regulation pile and deck type. Figure 5.24-1 shows a typical cargo pier, and Figure 5.24-2 shows a combination personnel and cargo pier. 5-298