needed is discussed. The advantages of an undersea aqueduct, as compared with an overland 

 aqueduct, are discussed briefly. Possible pipe materials, anchoring systems, pipeline 

 fabrication and installation procedures, inspection, maintenance, and ecological considera- 

 tions are also discussed. 



62. ARON, H., "Large Bore HD Polyethylene Pipe," Pipes and Pipelines International, 

 London, Vol 13, No. 4, Apr. 1968, pp. 39-43. 



63. ARRIENS, J. L., "Progress in Offshore Pipelines," Pipes and Pipelines International, 

 London, Vol 11, No. 7, July 1966, pp. 28-33. 



64. ATTERBURY, T. J., and SORENSON, J. E., "The Technology of Offshore Pipelines," 

 Littoral Lines, Vol II, No. 3, Mar. 1967. 



Keywords: Lay barge. Offshore pipeline 



Some problems involved in laying offshore ^jipelines are discussed, including the 

 problem of high-bending stresses that develop during the laying operations from a lay barge 

 with a stinger. Concrete weight coats and trenching are also mentioned. 



65. BATTELLE MEMORIAL INSTITUTE, "The Technology of Offshore PipeUnes," 

 Littoral Lines, Vol II, No. 3, Mar. 1967. 



Keywords: Lay barge. Offshore pipeline 



Article briefly discusses some problems involved in laying offshore pipelines, including 

 the problem of high-bending stresses that develop during the laying operations from a lay 

 barge with a stinger. Concrete weight coats and trenching are also mentioned. 



66. BEATTIE, J. F., and BROWN, L. P., "Lift and Drag Forces on a Submerged Circular 

 CyUnder," Offshore Technology Conference, Vol I, Apr. 1971, pp. 1319-1328. 



Keywords: Circular cylinder, Lift and drag forces 



Paper discusses the results of a laboratory investigation of the Uft and drag forces on a 

 submerged circular cylinder located adjacent to a plane wall. Circular cylinders ranging in 

 diameter from 6 to 30 inches were tested in a semi-infinite llow stream in both wind and 

 water tunnels. Cylinders of both smooth and rough surfaces were tested in horizontal and 

 vertical positions. The lift and drag coefficients were empirically correlated with the 

 Reynolds number, and the experimental results are presented in several graphs. 



67. BECKMAN, H., "An Investigation of Forces Acting on Offshore Pipe Lines Due to 

 Wave Action," Rice University, Houston, Tex. 



