Spoil placement. 



D-21P In the case of flotation canals, the spoil materials from the 

 canal shall not be placed closer than ( desired distance ) meters 

 from the banks of navigable waterways crossed, nor disposed of 

 where they will enter ponds, lakes, canals, or other water- 

 courses. 



D-24P Spoil levees created as a result of canal dredging shall have 

 gaps cut in them at least ( desired width ) meters wide with 

 intervals of not less than ( desired distance ) meters between 

 gaps. If spoil from the canal is placed on both sides of the 

 canal, the gaps to be cut in the levees shall be directly 

 opposite each other. Spoil from the dredging of a canal shall 

 be placed within the construction right-of-way as directed by 

 the land manager. 



Line depth below surface. 



D-57 The top of the pipeline shall be placed at not less than 0.9 m 

 (3 ft) below the present surface of the land. 



Line placement. 



D-60 Flowlines should be laid across the marsh surface and allowed 

 to sink and settle naturally. They should not be buried since 

 vehicle movement as well as digging and backfilling would result 

 in further channelization and marsh alterations. 



D-17P To the greatest extent possible, new gas and oil pipelines will 



use existing pipeline easement areas to route the facility across 

 refuge lands. 



D-18P Unless site conditions are shown to be totally unsuitable, the 

 "push-ditch" or "shove" method of pipeline installation shall 

 be utilized. 



D-19P To the greatest extent possible, installation of all flowlines, 

 supply lines, and utility lines shall be confined to existing 

 levees, dredged canals, and existing line access routes. 



387 



