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File: Appd Item Download 2022-09-16 22-08-16
appendix d 1 2 appendix d 3 anchoring plan 4 disposition of offshore cooling water conduits february 18 2005 d 1 songs unit 1 eir appendix d 1 2 3 ...

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                                                                                                  Appendix D  
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          2                                         Appendix D 
          3                                      Anchoring Plan 
          4     
                 Disposition of Offshore Cooling Water Conduits 
               February 18, 2005                            D-1                             SONGS Unit 1 EIR 
                                                                                                  Appendix D  
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                 Disposition of Offshore Cooling Water Conduits 
               February 18, 2005                            D-2                             SONGS Unit 1 EIR 
                    Southern California Edison Company                                                                                            
                    SONGS 1 Intake and Discharge Conduit Dispositioning Project                                                Work Execution Plan 
                                                         SECTION FIFTEEN - ANCHORING PLAN 
                     
                    15.1 Overview 
                             All nearshore and offshore activities will take place from a support vessel or derrick barge, or a 
                             surf sled vehicle (SSV). The support vessel or derrick barge will be moored in three or four-point 
                             anchorages. The SSV will be pulled ashore by a beach winch anchored by a deadman. The 
                             following anchoring protocols and plans will be employed in deploying, utilizing and recovering 
                             anchorages. 
                              
                    15.2 Anchoring Requirements 
                             The disposition work will generate the following anchoring requirements: 
                              
                             15.2.1  Support Vessel or Derrick Barge Anchoring 
                                       A support vessel or derrick barge will be used to support the SSV operations and to 
                                       support all offshore dispositioning operations.  The support vessel or derrick barge will be 
                                       moored over the planned work locations utilizing four anchorages (Anchor Set). Anchor 
                                       Sets 1 through 3 will consist of 4-point anchorages while Anchor Set 4 will consist of a 3-
                                       point anchorage. 
                                         
                             15.2.2  Beach Winch Anchoring    
                                       The SSV will be pulled shoreward from its launching position by a beach winch anchored 
                                       to the beach with a buried deadman. 
                     
                    15.3     Definition of an Anchor Set 
                             For purposes of this WEP, an “anchor set” is defined as any combination of anchors set at 
                             predetermined locations to provide anchorage within a defined work area. For example, a four-
                             point anchor set involves the deployment of one anchor from each of the four corners of the 
                             derrick barge or support vessel. 
                              
                             15.3.1  Predefined Anchor Set 
                                       Four anchor sets have been predefined for the nearshore and offshore dispositioning. 
                                       These anchor sets have been plotted in attached Appendix C - Anchor Pre-Plot. The final 
                                       locations and sizes of the anchor sets may be adjusted in the final Work Execution Plan 
                                       as needed to suit the site conditions in existence when the dispositioning work is actually 
                                       performed. 
                     
                    Final Draft 120804 Page 92 
                    Associated Pacific Constructors, Inc. 
                    Southern California Edison Company                                                                                            
                    SONGS 1 Intake and Discharge Conduit Dispositioning Project                                                Work Execution Plan 
                              
                              
                             15.3.2 Safety Zone 
                                       A safety zone is proposed around the anchor set. This safety zone will be defined as an 
                                       imaginary boundary drawn between each anchor crown buoy of the anchor set.  The 
                                       purpose of this safety zone is to provide a boundary around the marine work site that 
                                       helps commercial and recreational vessels in identifying the marine work site and 
                                       remaining outside of the work areas. The safety zone will be physically discernable at the 
                                       work sites by visually sighting between the crown buoys of the anchor set. The crown 
                                       buoys will be marked with appropriate colors, striping and lettering, and will be also be 
                                       marked with strobe lights. 
                     
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                        Figure 15-1        Typical Anchor Set Diagram 
                     
                     
                    Final Draft 120804 Page 93 
                    Associated Pacific Constructors, Inc. 
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