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" I , ,,, J I. I ~ ~ \ t , , G - "- J.. l. ,.~ STEEL PIPE 79 section was submitted to rigid hydrostatic test, checked for round- ness, fitted with inside braces to maintain its shape and then trncked to the Macco yard in Clearwater. Here the specified coating was applied, inside and outside, and cured. These operations covered a minimum period of abont 15 days, after which the pipe was trucked directiy to the iine, and using a crawler-type crane with 50-foot boom, was laid in the trench, ready for welding. Laying was done on the day shift only. From 18 to 24 sections were laid daily throughout most of this job, with a maximnm on one day of 33. Arc welding of joints, by certified welders working in pairs, one inside and one outside. followed as closely behind the laying operations as possible. At no time was welding done simultaneously on the inside and ontside of the same joint. After welding, every joint was tested with a liqnid soap solution pumped into the lapped space between the inside and ontside weids under a pressure of about 80 pounds per square inch. When all welding and testing had been completed the joints were cleaned, enameled, if required. and gunited to make all coating continnous on both inside and outside surfaces. During the backfilling of the trench the pipe was filled with water between temporary steel bulkheads welded in place at about I,OOO-foot intervals and a pressure of 50 pounds per square inch applied. The backfill was placed carefully without injury to the pipe and jetted for thorough compaction. In private right of way the original gronnd surface was restored, and in public streets the paving was replaced in accord with city or county requirements. The final tests prior to acceptance of the work showed a leakage well within the specified iimits. All construction of pipe lines, including necessary iateral turnont, relief valve, pressure-regulating valve, blowoff valve, manhole, and other structures was completed on October 31, 1939. The third contract for the laterals to Long Beach, Torrance, and Compton, scheduies 2l,SC, 27SC, and 28SC, respectively, was awarded December 30, 1938 to Western Pipe and Steel Company, of Los Angeles, on its low bid for welded steel pipe with spun-mortar lining and gunite exterior coating. Except for the diameters these pipe lines are identicai with the Palos Verdes feeder, of which they are branches. The general contractor fabricated all steel pipe and specials and did the field welding of all joints. The hauling and coating of the pipe were subcontracted to Macco Construction Company, which