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INTRODUCTION 



The Civil Engineering Laboratory (CEL) began its work on OTEC 

 anchor systems in May 1975. The Phase I effort was directed toward 

 identifying those anchor types best-suited for mooring OTEC. First, a 

 state~of-the-art review was conducted, collecting all available informa- 

 tion accessary to analytically scale the existing anchor types up to the 

 sizes required to moor OTEC [1]. Second, the existing anchor types were 

 scaled up to provide the required holding capacities in five possible 

 seafloor materials. Those anchor types proving unfeasible or impracti- 

 cal were omitted from further consideration. The configurations oi^the 

 remaining anchor types were optimized to provide a high ratio of lateral 

 holding capacity to weight [2). Recommendations of anchor types for 

 OTEC are presented in Reference 3. In September 1976, the Phase Ila 

 anchor effort was initiated to: (a) evaluate fabrication, transport, 

 lowering, and seafloor construction techniques and their impact on the 

 proposed anchor designs; (b) select those anchor designs offering an- - 

 optimal balance between technical feasibility and cost; and (c) prepare 

 a plan for development, outlining the shortcomings in present analytical 

 techniques and construction/installation equipment capability and recom- 

 mendipg a course of action necessary to overcome these problems. Phase 

 Ila is now complete and is reported herein. 



