d) Pipe tied in by welding 



e) Joints prepared as in IV.A.l.a.8.a.2, 

 IV.A.l.a.8.a.4, or IV.A.l.a.S.b 



11) Backfilling area 



a) Side boom with Mormon board, dozer or dragline 

 pulls material back to ditch 



b) Excess material is place^ in mound over ditch to 

 compensate for settling and compaction 



12) Cleanup 



a) Area graded to natural contours by dozers 



b) Debris is removed 



c) In some cases topsoil may be replaced 



(1) Soil trucked in 



(2) Soil spread over area by tractor 



d) Pipeline right of way may be fertilized and seeded 



e) Exposed valve heads, vents, expansicn joints 



(1) Area where pipe is exposed may be fenced 

 ofl 



(2) Shell or concrete floor may be constructed 

 in small fenced area 



13) Cathode devices 



a) Cathode box is placed near power line 



b) Electrodes or ground bed anode material placed 

 near pipe in ground 



c) Anode line connected to electrodes 



(1) Line ploughed into ground or surface connec- 

 tion 

 Moderately firm marsh soils - push method 



1) Survey canal and slip for push barge (1-2 days) 



d) Cathode line connected to pipeline {e\/ery 1.6-8 km) 

 (1) Line ploughed into ground or surface connec- 

 tion 



a) Surveyor entry - truck, marsh buggies 



b) Stake or marker placement while traversing route 



c) Return of vehicles to exit 



2) Dredged entrance to marsh (1-2 days) 



a) Barge mounted dragline or suction dredge and 

 auxiliary vessels enter from Intracoastal Water- 

 way or existing canals 



b) Dredge to edge of marsh 



c) Place spoil on land, submerged next to access 

 canal, or on existing disposal sites 



3) Dredge to push site (40-300 m/day) 



a) Locate and mark spoil disposal sites 



b) Possible placement of spoil containment struc- 

 tures 



c) Dredge out channel to push slip and slip itself 



d) Place spoil in designated areas 



(1) Continuous levee 



(2) Distinct mounds 



(3) Broadcast over large area 



(4) Barge for dewatering and transport away 



e) Stabilize mounds or levees 



f) Push barge, auxiliary barges, pushed in by tug 



g) Manage machine, human, and process wastes 



434 



